V32_HVAC_Systems.pdf

SHELL NIGERIA EXPLORATION AND PRODUCTION COMPANY Ltd.

Bonga FPSO Plant Operating Procedures Manual Volume 32 HVAC SYSTEMS

OPRMOPRM-20032003-0332

Version: 1.2

This document is not confidential. The Copyright of this document is vested in Shell Nigeria Exploration and Production Company Limited. All rights reserved. Neither the whole nor any part of this document may be reproduced, stored in any retrieval system or transmitted in any form or by any means (electronic, mechanical, reprographic, recording or otherwise) without the prior written consent of the copyright owner.

Shell Nigeria E & P Company Ltd.

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Document Status Information 1.0. DOCUMENT CONTROL 1.1. Change History Date

Version

Author

Ref Indicator

30/09/04

1.0

ODL

–

First issue.

31/08/05

1.1

ODL

–

Amendments to Part 1 Section 1 Paragraphs 1.3.2 and 1.4.2.

Change Description

Amendments to Part 1 Section 2 Paragraphs 2.2.1, 2.3.1, 2.16.2, 2.16.3, 2.16.4, 3.4.4 and 3.5.1. Amendments to Part 2 Section 1 Procedure No 1/002: • Steps 5, 7, 13, and 14 removed Amendments to Part 2 Section 1 Procedure No 1/003: • Steps 18 and 20 altered Amendments to Part 2 Section 2 Procedure No 2/001: • Steps 7 and 9 altered Amendments to Part 2 Section 2 Procedure No 2/003: • Step 4 removed • Step 5 altered

30/04/06

1.2

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Amended to reflect changes to POPM titles.

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2.0 PURPOSE The purpose of this document is to provide guidance on the safe, efficient and environmentally aware operation of the Hull and Topsides HVAC Systems. It is one Volume within an overall suite of Volumes, which comprise the Bonga FPSO Plant Operating Procedures Manual (POPM). The full listing of Volumes is as follows: Volume 1 Volume 2A Volume 2B Volume 2C Volume 2D Volume 3 Volume 4 Volume 5 Volume 6 Volume 7 Volume 8 Volume 9 Volume 10 Volume 11 Volume 12 Volume 13 Topsides) Volume 14 Volume 15 Volume 16 Volume 17 Volume 18 Volume 19 Volume 20 Volume 21 Volume 22 Volume 23 Volume 24 Volume 25 Volume 26 Volume 27 Volume 28 Volume 29 Volume 30 Volume 31 Volume 32 Volume 33 Volume 34 Volume 35

OPRM-2003-0332

Field and Facilities Overview Subsea Production Facilities Subsea Waterflood System Subsea Control System Flow Assurance Guidelines Oil Separation and Treating Oil Storage, Handling and Ballast Systems Oil Metering and Export System Vapour Recovery Compression System Field Gas Compression System Gas Dehydration/Glycol Regeneration Systems Gas Export/Import/Lift Systems (incl Metering) Flare and Vent Systems Produced Water Treatment System Waterflood System Chemical Injection and Methanol Injection System (Hull and Fuel Gas System Heating Medium System Drainage Systems Sewage Treatment System Bilge and Sludge Systems Inert Gas System Nitrogen Generation System Seawater System (Hull) Fresh and Potable Water Systems Diesel Fuel System Aviation Fuel System Instrument and Utility Air System Hydraulic Power Systems (Hull) Fire Protection Systems and Equipment (Hull and Topsides) Safety and Lifesaving Equipment PSCS and ESS Power Generation and Distribution Systems (Hull and Topsides) Black Start Procedures HVAC Systems Deck Machinery and Mechanical Handling Systems (Cranes, etc) Telecommunications Ancillary Living Quarters (ALQ)

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SCOPE This document provides a detailed description of the plant and equipment, which comprise the Hull and Topsides HVAC System, and includes step-bystep guidance on the operation of the system and its equipment, under both normal and abnormal operation.

4.0

TARGET READERSHIP READERSHIP All SNEPCO staff, contractors and other third-party personnel who may be involved in the operation of the HVAC System onboard the Bonga FPSO.

5.0

SPECIAL NOTE Not applicable.

6.0

ABBREVIATIONS The abbreviations used within this document are listed at the end of these introductory pages.

7.0

REFERENCE INFORMATION/SUPPORTING DOCUMENTATION The primary reference/supporting documents, which have been either used or referred to in the development of this document, are listed at the end of these introductory pages. These are part of the available Operational Documentation that SNEPCO Offshore Operations (OO) has in place to support its day-to-day operations. These and many other documents are available within the SNEPCO Livelink System. Where appropriate, these documents have been cross-referenced within this document.

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Abbreviations 2oo2 2oo3

Two-out-of-two Two-out-of-three

AHU

Air Handling Unit

CCR CER CO2

Central Control Room Central Equipment Room Carbon Dioxide

DCS DES DP

Distributed Control System Direct Engineering Services Differential Pressure

EDG ESS

Emergency Diesel Generator Emergency Support System

FPSO

Floating Production, Storage and Offloading

HMI HP HVAC

Human/Machine Interface High Pressure Heating, Ventilation and Air Conditioning

IGG IR

Inert Gas Generator Infrared

kW

Kilowatt

LCP LEL LP LQ LV

Local Control Panel Lower Explosive Limit Low Pressure Living Quarters Low Voltage

MCC MSB MSBR

Motor Control Centre Main Switchboard Main Switchboard Room

NSV

North Sea Ventilation

OIM

Offshore Installation Manager

Pa PABX PAC PSCS

Pascall Telephone Exchange Room Package Air Conditioner Process Safety Control System

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Abbreviations (cont’ d) SLD SSDS

Single Line Diagram Safety Shutdown System

TER TR

Telecom Equipment Room Temporary Refuge

UCP UPS

Unit Control Panel Uninterruptible Power Supply

VAV

Variable Air Volume

WS

Workshop

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Reference Information/Supporting Documentation Project Data Document No/Ref

Document Title

BON-AME-3GN-J-16017001

Programming Functional Specification Heating, Ventilation and Air Conditioning (HVAC) – Hull

BON-AME-3GN-H-00117001

HVAC Design Philosophy

BON-AME-3PW-H-20117001

HVAC D&ID Power Module Main Switch Room System


HVAC D&ID Power Module Turbine Generator Rooms

BON-AME-3SS-H-20117003

HVAC D&ID Starboard Subsea Auxiliary Switch Room

BON-AME-3CC-H-20117004

HVAC D&ID Compressor Control Module

BON-AME-3CC-H-20117005

HVAC D&ID Compressor Control Module Battery Room


HVAC D&ID Power Module Battery Room

BON-AME-3SS-H-20117007

HVAC D&ID Starboard Subsea Module Battery Room

BON-AME-3PP-H-20117008

HVAC D&ID Port Process Module Water Laboratory

BON-AME-3GN-H-20117009

HVAC D&ID Cofferdam Area Main Deck.


Programming Functional Specification HVAC (Hull)


HVAC Equipment and Ductwork Specification

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Vendor Data Vendor

Document Number

Document Title

Direct Engineering Services

BON/1MA1792/DIRECT/00000 2

Central Unit For Air Conditioner

Hipres

BON/1SA1379/HIPRES/000001

M/Space Fans And Dampers


D-6540-003

Technical Manual

Direct Engineering Services

80471-MSL-01 to 012

HVAC Single Line Diagrams (HULL)


6540-PW-PID-001

P&ID Refrigeration Supply for Battery Room (PW) AHU A-1770A/B


6540-PW-PID-002

P&ID Refrigeration Supply for Battery Room (PW) AHU A-1775A/B

Vendor

Document Number

Document Title


6540-SS-PID-001

P&ID Refrigeration Supply for Battery Room (SS) AHU A-1771A/B


6540-SS-PID-002

P&ID Refrigeration Supply for Battery Room (SS) AHU A-1776A/B


6540-CC-PID-001

P&ID Refrigeration Supply for Battery Room (CC) AHU A-1772A/B


6540-CC-PID-002

P&ID Refrigeration Supply for Battery Room (CC) AHU A-1777A/B


6540-PP-PID-001

P&ID Refrigeration Supply for Port Process Water Lab AHU A-1774A/B

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HEMP Actions No 1

Description Check compressor crankcase lube oil level in applicable procedures. Inadequate compressor lubrication and/or operator error. Harm to operator, equipment damage, environmental impact.

OPRM-2003-0332

Control Measure Action: Write and incorporate applicable supplementary procedure for compressors crankcase lube oil level check and refer to this supplementary procedure where required.

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ODL Action Refer to Part 2 Section 2 Procedure No 2/002 Step 4.

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Main Table of Contents

Document Status Information Abbreviations Reference Information/Supporting Documentation Part 1 – Technical Technical Description Section 1

System Overview

Section 2

System Description – Hull HVAC

Section 3

System Description – Topsides HVAC

Part 2 – Operating Procedures Section 1

System Operating Procedures

Section 2

Equipment Operating Procedures

Section 3

Supplementary Supplementary Operating Procedures

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PART 1 TECHNICAL DESCRIPTION Section 1

System Overview.

Section 2

System Description – Hull HVAC

Section 3

System Description – Topsides HVAC

Part 1 Technical Description

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Part 1 Technical Description. Section 1 System Overview.

Table of Contents 1.0

2.0

HULL HVAC SYSTEMS ................................................................................................. 2 1.1

Introduction.......................................................................................................... 2

1.2

Forward Space HVAC System ............................................................................ 2

1.3

Machinery Spaces Ventilation System ................................................................ 3

1.4

Main HVAC System............................................................................................. 6

TOPSIDES HVAC SYSTEMS....................................................................................... 10 2.1

Introduction........................................................................................................ 10

2.2

Power Module Main Switchroom ....................................................................... 11

2.3

Power Module Battery Room............................................................................. 11

2.4

Turbine Generator Rooms................................................................................. 12

2.5

Starboard Subsea Module Auxiliary Switchroom .............................................. 12

2.6

Starboard Subsea Module Battery Room.......................................................... 12

2.7

Compressor Control Module.............................................................................. 13

2.8

Compressor Control Module Battery Room....................................................... 13

2.9

Chemical and Methanol Tank Cofferdam .......................................................... 14

2.10

Port Process Module Water Laboratory ............................................................ 14

2.11

Refrigeration Systems ....................................................................................... 15

Part 1 Section 1 System Overview

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HULL HVAC SYSTEMS The HVAC System consists of two main systems: the Hull Ventilation System and the Topsides Ventilation System.

1.1

Introduction The Hull HVAC System comprises the following subsystems: •

Forward Space HVAC System

•

Machinery Spaces Ventilation System

•

Main HVAC System (Accommodation)

1.2

Forward Space HVAC System

1.2.1

Introduction The forward fire pump rooms, forward foam room, forward lower void and the fresh air supply to Package Air Conditioner A-1713 are fitted with a forced ventilation system with Supply Fan K-1722 providing ducted air from the upper deck port side. The temporary refuge room, locker workshop, forward store, and port and starboard air locks are provided with a standalone air-cooled Package Air Conditioner (PAC) A-1713 to supply a mixture of outside air and recirculated air. Surplus air is expelled through outlet ducts on the forecastle deck. Air intakes and exhausts for the forward spaces forced ventilation system are fitted with pneumatically operated fire dampers, which are grouped and controlled by the Fire and Gas System. The deck store on the port side is equipped with Exhaust Fan K-1721. Refer to 80471-MSL-11 HVAC SLD Upper Deck Forward.

1.2.2

Flow Summary Supply Fan K-1722 provides fresh air directly to the following forward space areas: •

Forward Fire Pump Room 1

•

Forward Fire Pump Room 2

•

Forward Foam Room

•

Lower Void

•

Fresh Air to PAC A-1713

Each space vents to the forecastle through individual mushroom vents. Supply and vent trunks are fitted with fire dampers. The fire pump rooms are also supplied with a combustion air inlet.


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PAC A-1713, which is located in the forward store, supplies the following areas: •

Temporary refuge room

•

Locker workshop

•

Forward store

•

Port and starboard airlocks

Note: A-1713 is equipped with an inlet fire damper. The port and starboard airlocks have individual vents fitted with fire dampers leading to mushroom vents on the forecastle deck above. The other three spaces have a common vent duct, leading to a single mushroom vent fitted with a fire damper. The deck store on the port side is equipped with independent Exhaust Fan K-1721 and an inlet louvre. The louvre is fitted with a fire damper.

1.3

Machinery Spaces Ventilation System

1.3.1

Introduction The machinery spaces, with the exception of those areas supplied by Air Handling Unit (AHU) 3 for the 2nd Deck main switchboard rooms, workshops and stores, are provided with a forced ventilation system. The machinery spaces forced ventilation system consists of four sets of supply fans as follows: •

Non-reversible Supply Fans K-1731A/B are located in the machinery space 2nd Deck, starboard side

•

Reversible Fans K-1732A/B are located in the machinery casing, main deck level

The fans provide ducted air to all machinery space areas at the various deck levels. Surplus air exhausts naturally through two outlet trunks in the casing on B Deck. Supply Fans K-1732A/B can be operated in the reverse direction from the Distributed Control System (DCS) to exhaust the machinery spaces, if necessary, in the event of fire or smoke. The aft fire pump rooms are each fitted with supply fans as follows: •

Port fire pump room – K-1733A/B

•

Starboard fire pump room – K-1733C/D

The Inert Gas Generator (IGG) room is classified as independent of the machinery spaces, and is supplied by Supply Fans K-1718A/B on C Deck. All air intakes and exhausts for the machinery spaces forced ventilation system are fitted with pneumatically operated fire dampers, which are grouped and controlled by the Fire and Gas System. Air Handling Unit 3 (A-1704) is located on the 2nd Deck of the machinery space and provides pre-conditioned fresh air to the LV switchboard rooms, workshops and stores.


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Refer to:

1.3.2

•

80471-MSL-03 HVAC SLD 2nd Deck Aft

•

80471-MSL-04 HVAC SLD Upper Deck Aft

Flow Summaries Machinery Space Starboard Supply Fans K-1732A/B The fresh air intake for the machinery space Starboard Fans K-1732A/B is through the intake trunk on D Deck and is fitted with pneumatic Fire Dampers 17-FD-253/254. Machinery Space Port Supply Fans K-1731A/B Port Fans K-1731A/B air intake is from the B Deck level of the starboard intake trunk and is fitted with Fire Dampers 17-FD-251/252. These supply fans operate continuously on a duty or standby basis. Fresh air is supplied directly through trunking to all levels of the machinery space plus the following machinery space areas: •

Purifier room

•

Hydraulic power-pack rooms

•

Essential service generator room

•

Incinerator room

General surplus air routes through the machinery space deck inlets to the louvre for the Machinery Space Casing 17-FD-255/256 on B Deck which is fitted with pneumatic fire dampers. The machinery space rooms are provided with fans and dampers as follows: •

Essential Services Generator The essential service generator room is fitted with two pneumatic fire dampers to isolate the room in the event of a fire or smoke ingress.

•

Purifier Room The purifier room supply air ducting is fitted with a pneumatic fire damper. Exhaust Fan K-1736 removes exhaust air from the purifier room to a safe location on B Deck. The fan is located in ductwork on the fourth deck and fitted with a pneumatic fire damper.

•

Toilet and Welding Spaces The machinery space toilet and welding spaces are supplied with Exhaust Fans K-1735 and K-1734, respectively. Exhaust Fan K-1735 is located in the ceiling of the toilet and K-1734 is located on the wall of the welding space. Each fan is fitted with non-return flaps and exhausts through dedicated ducts into the machinery space casing on B Deck.


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Aft Firepump Rooms The port and starboard aft firepump rooms each have their own dedicated intake trunk on the port and starboard of B Deck. Each firepump room has two 100% supply fans, each fitted with a fire damper. Port and starboard Firepump Room Supply Fans K-1733A/B and K-1733C/D respectively are located on the upper deck. The exhaust from the aft firepump rooms passes through ductwork fitted with pneumatic fire dampers to mushroom vents on the upper deck.

•

IGG Room The IGG room is ventilated by Supply Fans K-1718A and K-1718B from mushroom vents on C Deck, passing into the IGG room through two pneumatic fire dampers. Used air is exhausted from the IGG room through a separate fire damper located at B Deck level.

•

Foam/Water Mist Room The foam/water mist room is ventilated by Supply Fan K-1719, which is fitted with a pneumatic fire damper located below the foam/water mist room. Used air is extracted to vent below the foam/water mist room, which is fitted with a pneumatic fire damper, by Exhaust Fan K-1720.

•

Emergency Diesel Generator (EDG) Room The EDG room is ventilated by Supply Fans K-1704 and K-1705 through individual fire dampers. When the EDG starts, three additional exhaust fire dampers open automatically.

•

Paint Store The paint store is ventilated by Supply Fan K-1702 through a supply fire damper. Used air is exhausted via a separate fire damper.

•

Chemical Locker The chemical locker is ventilated by Supply Fan K-1701 through a supply fire damper. Used air is exhausted via a separate fire damper.

•

Machinery Spaces Cofferdam The machinery spaces cofferdam, below the accommodation, is provided with an inlet fire damper. Exhaust Fans K-1703A/B ventilate the cofferdam space passing to atmosphere through a common exhaust fire damper.

•

LV Main Switchboard Room (MSBR), Workshops and Stores AHU A-1704 For a general introduction to the four main Air Handling Units: A-1702A/B, A-1703 and A-1704, refer to Paragraph 1.4. Air Handling Unit A-1704, located in the machinery space 2nd Deck is a 100% duty, single fan unit dedicated to providing cooled fresh air to the machinery spaces LV MSBR, workshops and stores. The system is designed to provide a mixture of outside air and recirculated air. The outside air is from a common riser shared with AHUs A-1702A/B and A-1703.


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On AHU A-1704 volume control dampers are provided on the return air and outside air inlets to ensure the correct ratio enters the units. Mixed air then passes through a bank of panel filters prior to cooling with chilled water. Conditioned air is discharged from the fan into the supply plenum and is then transferred to the switchboard room areas, workshop and stores on the 2nd Deck by way of a supply duct and a number of wire-mesh discharge grilles. Recycled air from the spaces is returned to the AHU through a number of return air grilles. Air passes through the ducting and enters the mixing chamber section of AHU A-1704. Recycled air from the LV MSBR passes through a fire damper before returning to the mixing chamber of the AHU. •

Package Air Conditioners Standalone freshwater-cooled Package Air Conditioner PAC-1710 is located within the LV MSBR. Standalone freshwater-cooled Package Air Conditioner PAC-1711 is located within the engineering workshop. Standalone freshwater-cooled Package Air Conditioner PAC-1712 is located within the engineering store.

1.4

Main HVAC System

1.4.1

Introduction The Main HVAC System for the accommodation block and machinery spaces of the Bonga FPSO is designed to maintain a relative humidity and temperature as follows: •

•

Summer −

Outside Temperature 35°C Relative Humidity 85%

−

Inside Temperature 23°C Relative Humidity 50%

Winter −

Outside Temperature 20°C Relative Humidity 70%

−

Inside Temperature 21°C Relative Humidity 65%

The spaces are maintained by the HVAC System controls at a positive pressure of 50Pa relative to the outside atmospheric pressure. This is achieved by manually adjusting the exhaust dampers during commissioning of the main HVAC System equipment, and also by modulating the return air dampers or pressure control dampers in the distribution ducting during service. The air conditioning for the accommodation block and machinery spaces is divided into three areas. •

Main accommodation, supplied by AHUs A-1702A and A-1702B

•

Central Equipment Room (CER), Central Control Room (CCR), data telecommunications room and Uninterruptible Power Supply (UPS) space, supplied by AHU A-1703

•

MSBRs, workshops and stores, supplied by AHU A-1704

Note: This unit is treated as being within the machinery spaces HVAC. Part 1 Section 1 System Overview

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All four AHUs take their supply air from the same common inlet duct which has two 100% intakes: one on C Deck and one on B Deck, at the aft end of the accommodation block. The salt eliminator/moisture removal coalescer facility is fitted between the fresh air intake louvres and the air handling unit. The air pressure, temperature and humidity in the various areas are controlled by local control panels. However, the AHU temperatures are remotely monitored and can be adjusted on the DCS. In addition to the ventilation from the main AHUs, there are also various areas and rooms within the accommodation which are also provided with dedicated ventilation systems. The areas and rooms are described in Paragraph 1.4.2. Refer to:

1.4.2

•

80471-MSL-05 – HVAC SLD A Deck Aft

•

80471-MSL-06 – HVAC SLD B Deck Aft

•

80471-MSL-07 – HVAC SLD C Deck Aft

•

80471-MSL-08 – HVAC SLD D Deck Aft

•

80471-MSL-09 – HVAC SLD E Deck Aft

•

80471-MSL-10 – HVAC SLD E Deck Top Aft

Flow Summaries Chilled Water System The two 100% duty/standby Chilled Water Units A-1704A and B are located in the machinery spaces 3rd Deck level to serve the AHUs for the main HVAC System. The chillers are coupled to two 100% duty/standby Chilled Water Pumps P-1703A and B located on the 3rd Deck. These provide circulation of chilled water through the evaporators and common recirculation pipework. Cooling medium for the chillers is provided from the low-temperature Cooling Freshwater System, which is controlled independently from the HVAC System. Chilled water is circulated through the cooling coils of the four main AHUs, each of which is fitted with a three-way temperature control valve. These temperature control valves allow water to pass through or bypass the respective AHU as necessary to maintain the desired temperature/humidity conditions of the supply air. Chilled water is also supplied to the respective PAC. AHUs A-1702A and A-1702B AHUs A-1702A and A-1702B, located in the A Deck air handling room, are 100% duty/standby units, with two supply fans each which provide pre-conditioned fresh air from the air inlet on the aft end of A Deck to the accommodation deck areas. The system is designed to provide a mixture of fresh and recirculated air. Fresh air is taken from a common riser shared with Air Handling Unit A-1703. Volume control dampers are provided on the return and fresh air inlets to ensure that the correct air ratio enters the various AHUs. The mixed airflow then passes through a bank of panel filters prior to being cooled with chilled water.


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Conditioned air is discharged from the AHU fans to the supply plenum and is transferred to the deck areas by a number of duct branches. From the duct branches, the air enters the individual spaces through a number of constant-volume units, variable-volume units and cabin units complete with discharge grilles. Where the air boxes are the variable-volume-type they are controlled by a local thermostat in the space, this drives the inlet damper closed in response to the space temperature falling below the predetermined set point. The cabin units have the facility to have their airflow adjusted by a lever on the diffuser to best suit the needs of the individual occupants. This facility is not provided on the larger constant-volume units and variable-volume boxes. Recycled air from the accommodation deck levels is returned to the AHUs through a number of return air grilles on each deck. Return air passes through the ducting and main riser and enters the plant room by way of a large mesh grille prior to entering the mixing chamber section of the AHUs. CER, CCR, PABX and UPS Air Handling Unit (AHU) A-1703 Air Handling Unit A-1703, which is located in the A Deck air handling room, is a 100% duty unit, with a single fan, providing cooled fresh air from the fresh air inlet on the aft end of A Deck to the CER, CCR, PABX and UPS areas. The system is designed to provide a mixture of fresh and recirculated air. The fresh air is taken from a common riser, which is shared with Air Handling Units A-1702A/B and A-1703. Volume control dampers are provided on the return and outside air inlet to ensure that the correct air ratio enters the units. The mixed air then passes through a bank of panel filters prior to being cooled by chilled water. Conditioned air is discharged from the fans into the supply plenum and is transferred to the CER/CCR/PABX/UPS areas by way of a supply duct and a number of variable volume units complete with discharge grilles. The variable-volume-type units are controlled by a local thermostat in the space, this drives the inlet damper closed in response to the space temperature falling below the predetermined set point. Recycled air from the spaces is returned to the AHU via a number of return air grilles. Air passes through the ducting and enters the mixing chamber section of the AHU. Package Air Conditioners • Standalone air-cooled Package Air Conditioner PAC-1705 is located within the CER •

Standalone air-cooled Package Air Conditioner PAC-1706 is located within the CCR

•

Standalone air-cooled Package Air Conditioner PAC-1707 is located within the PABX

•

Standalone air-cooled Package Air Conditioner PAC-1708 is located within the UPS

•

Standalone air-cooled Package Air Conditioner PAC-1709 is located within the Telecom Equipment Room (TER)


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In addition to being included in the main accommodation HVAC System, the following areas and rooms are provided with separate ventilation systems as described below. •

Galley The galley is provided with fresh air Supply Fans K-1712A/B, Exhaust Fans K-1712A/B and five fire dampers (one supply damper from the AHU, plus galley hood supply and three exhaust dampers).

•

Gymnasium The gymnasium is provided with Exhaust Fan K-1711 and one exhaust fire damper.

•

C Deck Smoking Lounge C Deck smoking lounge is provided with Exhaust Fan K-1717 and one exhaust fire damper.

•

A Deck Smoking Coffee Shop A deck smoking coffee shop is provided with Exhaust Fan K-1706 and one exhaust fire damper.

•

E Deck Hospital E Deck hospital is provided with Exhaust Fans K-1714A/B and one exhaust fire damper.

•

Accommodation Toilets The accommodation toilets are provided with Exhaust Fans, K-1715A/B and one fire damper.

•

A Deck Laundry Rooms The A Deck laundry rooms are provided with Air Supply Fans K-1707A/B and one supply damper, and Exhaust Fans K-1708A/B with one exhaust fire damper.

•

E Deck Battery Room E Deck battery room is provided with Exhaust Fans K-1710A/B and one exhaust fire damper.

•

Lift-shaft Space The lift-shaft space is provided with Exhaust Fan K-1716, one fire damper on the natural supply and one exhaust fire damper.

•

TER Battery Room The battery room is provided with Exhaust Fans K-1710A/B and one exhaust fire damper. The fans operate under duty and standby control.


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2.0

TOPSIDES HVAC SYSTEMS

2.1

Introduction The topsides HVAC System consists of the following systems: •

Power Module HVAC System

•

Starboard Subsea HVAC System

•

Compressor Control HVAC System

•

Methanol and Chemical Cofferdam HVAC System

•

Port Process Module Water Laboratory HVAC System

The enclosed areas of the topsides modules are equipped with HVAC Systems to maintain design conditions and ventilation rates. Each enclosure has two dedicated air conditioning units, with 100% redundancy, positioned close to or within the enclosed area. The HVAC plants consist of louvred inlets, filter/coalescer, DX-type cooling coil, air-cooled condenser, supply fan and dampers. The systems are equipped with local control panels and field mounted instruments and controls. All systems have automatically operated shut-off dampers on air inlets and exhausts for isolation purposes. Supply system design is based on approximately 80% recirculation air and the air inlets are located to minimise wind effect wherever possible. In positively-pressurised areas, the air is exhausted to atmosphere by forced draught through pressure relief dampers. These pressure relief dampers are used to control the pressure of the enclosed area. 2.1.1

Battery Rooms Battery rooms are positively pressurised by ventilation to ensure that there is no ingress of hazardous gasses from outside whilst the ventilation system is operational. Positive room pressurisation is maintained by exhausting air from the room to atmosphere via pressure relief dampers. These pressure relief dampers are used to control the pressure of the room. Gas-tight dampers are installed on the air inlet and exhaust on the HVAC System. These are controlled by the HVAC control panel, which interfaces with the Emergency Support System (ESS), and are closed following confirmed gas detection at the inlet dampers. Battery rooms are equipped with duty and standby HVAC units to maintain room conditions. The HVAC Systems are supported by essential and emergency generators for continued operation in the event of a power failure. Dedicated local control panels located in the adjacent control/switch room control the battery rooms HVAC Systems.


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Generator Turbine Rooms Turbine areas are ventilated by ambient air, with negative flow through the rooms, to offset generator heat emission. Duty and standby extract fans, with a filter/coalescer and shut-off damper on the air inlet, are installed in the turbine generator rooms. If a turbine is shut down or trips, the relevant HVAC System will also shut down. The HVAC control panel for the main switchroom HVAC Systems controls the turbine generator HVAC Systems.

2.2

Power Module Main Switchroom Refer to BON-AME-3PW-H-20117-001. AHUs A-1770A/B, located on the power module main switchroom roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide a mixture of 20% fresh and 80% recirculated air to the power module main switchroom. Fresh air is supplied to the individual AHUs through an inlet cowl and inlet damper to the mixing chamber, where it mixes with the return air. Volume control dampers are provided on the return and outside air inlet to ensure that the correct air ratio enters the units. The mixed air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. Cooled pressurised air from the supply fan passes through the outlet damper to the power module main switchroom common supply duct, sound attenuator, shut-off damper and a number of variable volume units with discharge grilles. Recycled air from the power module main switchroom returns to the AHU mixing chamber section through return air grilles and return ducting.

2.3

Power Module Battery Room Refer to BON-AME-3PW-H-20117-006. AHUs A-1775A/B, located on the power module battery room roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide 100% fresh air to the power module battery room. Fresh air is supplied to the individual AHUs through an inlet cowl and inlet damper to the mixing chamber, where it mixes with the return air. The air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. Exhaust air from the power module battery room passes to atmosphere through return air grilles and ducting.


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Turbine Generator Rooms Refer to BON-AME-3PW-H-20117-002. The following description is for Turbine Generator A, however the description for the remaining turbine generators is identical. The system is designed to ambient air, with negative flow through the rooms, to offset generator heat emission. Cool fresh air is drawn through an inlet grille before passing through a filter/coalescer to remove solid particles and water. From the filter/coalescer, the air passes through a sound attenuator and a fire damper before passing to the turbine generator room. Extract Fans K-1776A/B, located on the roof of Turbine Generator Room A, remove the hot exhaust air. The hot exhaust air passes through an outlet grille and an outlet fire damper before passing to an exhaust fan suction filter. From the suction filter, the hot air is extracted to atmosphere through an outlet filter, outlet grill and sound attenuator.

2.5

Starboard Subsea Module Auxiliary Switchroom Refer to BON-AME-3SS-H-20117-003. AHUs A-1771A/B, located on the starboard subsea module auxiliary switchroom roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide a mixture of 100% fresh air to the starboard subsea module auxiliary switchroom. Fresh air is supplied through a common inlet cowl before passing through individual shut-off dampers to the mixing chamber, where it mixes with the return air. The air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. The cooled pressurised air from the supply fan passes through the outlet damper to the starboard subsea module auxiliary switchroom through a supply duct, sound attenuator, shut-off damper and a number of variable volume units with discharge grilles. Exhaust air from the starboard subsea module auxiliary switchroom passes to atmosphere through return air grilles and ducting.

2.6

Starboard Subsea Module Battery Room Refer to BON-AME-3SS-H-20117-007. AHUs A-1776A/B, located on the starboard subsea module battery room roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide 100% fresh air to the starboard subsea module battery room.


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Fresh air is supplied through a common inlet cowl before passing through individual shut-off dampers to the mixing chamber, where it mixes with the return air. The air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. The cooled pressurised air from the supply fan passes through the outlet damper to the starboard subsea module battery room through a supply duct and shut-off damper. Recycled air from the starboard subsea module battery room returns to the AHU mixing chamber section through return air grilles and return ducting.

2.7

Compressor Control Module Refer to BON-AME-3SS-H-20117-004. AHUs A-1772A/B, located on the compressor control module roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide a mixture of 20% fresh and 80% recirculated air to the compressor control module. Fresh air is supplied to the individual AHUs through an inlet cowl and inlet damper to the mixing chamber, where it mixes with the return air. Volume control dampers are provided on the return and outside air inlet to ensure that the correct air ratio enters the units. The mixed air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. Cooled pressurised air from the supply fan passes through the outlet damper to the compressor control module via a common supply duct, sound attenuator, shut-off damper and a number of variable volume units with discharge grilles. Recycled air from the compressor control module passes to the AHU mixing chamber section through return air grilles and return ducting.

2.8

Compressor Control Module Battery Room Refer to BON-AME-3SS-H-20117-005. AHUs A-1777A/B, located on the compressor control module battery room roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide 100% fresh air to the compressor control module battery room. Fresh air is supplied to the individual AHUs through an inlet cowl and inlet damper to the mixing chamber, where it mixes with the return air. The air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan.


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Cooled pressurised air from the supply fan passes through the outlet damper to the compressor control module battery room through a common supply duct, sound attenuator, shut-off damper and a number of variable volume units with discharge grilles. Recycled air from the compressor control module battery room passes to the AHU mixing chamber section through return air grilles and return ducting.

2.9

Chemical and Methanol Tank Cofferdam Refer to BON-AME-3SS-H-20117-009. Extract Fan K-1780A, located in the starboard process module, maintains a negative pressure in the chemical tank area by extracting the air through an outlet shut-off damper and extract filters. The filtered extract air is vented to atmosphere through an outlet cowl fitted with a bird screen. Extracted air is replaced by fresh air drawn in through an inlet cowl equipped with a bird screen. The air passes through a filter coalescer to remove solid particles and water from the air stream, before passing to the chemical tank area through an inlet shut-off damper before passing to the chemical tank area. Extract Fan K-1780B located in the port process module maintains a negative pressure in the methanol tank area by extracting the air through an outlet shut-off damper and extract filters. The filtered extract air is vented to atmosphere through an outlet cowl fitted with a bird screen. The extracted air is replaced by fresh air drawn in through an inlet cowl equipped with a bird screen. The air passes through a filter coalescer to remove solid particles and water from the air stream, before passing to the chemical tank area through an inlet shut-off damper before passing to the methanol tank area.

2.10

Port Process Module Water Laboratory Refer to BON-AME-3SS-H-20117-008. AHUs A-1774A/B, located on the port process module water laboratory roof, are 100% duty units providing pressurised air from the fresh air inlet on the AHUs. The system is designed to provide a mixture of 20% fresh and 80% recirculated air to the port process module water laboratory. Fresh air is supplied through a common inlet cowl before passing through individual shut-off dampers to the mixing chamber, where it mixes with the return air. Volume control dampers are provided on the return and outside air inlet to ensure that the correct air ratio enters the units. The mixed air then passes through a filter/coalescer to remove solid particles and water from the air stream. From the filter section, the air passes across a cooling coil with refrigerant passing through the coils before flowing through the AHU supply fan. The cooled pressurised air from the supply fan passes via the outlet damper to the port process module water laboratory through a supply duct, sound attenuator, shut-off damper and a number of variable volume units with discharge grilles. Recycled air from the port process module water laboratory returns to the AHU mixing chamber section via return air grilles and return ducting.


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Refrigeration Systems Each AHU is equipped with a dedicated refrigeration system, to cool the supply air. The following description is for the Power Module Main Switchroom Air Handling Unit A-1770A. The description for all other air handling units is identical, using the correcponding tag numbers. Refer to Part 1 Section 3 Figure 3.2 for clarity when following the text. Refrigerant gas is supplied from the discharge of Refrigerant Compressor A-1770A-K-02 to Condenser Coil A-1770A-HAC-01, which is cooled by the four Condenser Fans A-1770A-F-01/A to1770A-F-04 condensing the refrigerant gas to a liquid. The liquid refrigerant passes from the condenser to a refrigerant receiver for storage. From the receiver the liquid passes through a drier and a sight glass to Solenoid Valve 17-XY-882. This valve, which operates from LCP-1770, controls the flow of liquid refrigerant to Thermo Expansion Valves 17-TCV-880A/B. The thermo expansion valves control the expansion rate of liquid to gas in the evaporator (Cooling Coil A-1770A-HCC-01), thereby controlling the temperature of the mixed air in the air handling unit. From the evaporator, the refrigerant gas passes through a suction filter to the suction of Refrigerant Compressor A-1770A-K-02, where it is compressed. The hot compressed gas passes a discharge filter and a check valve to the air-cooled condenser once more to complete the cycle. Down stream of the compressor discharge is an offtake for the hot gas injection valve. This valve recycles hot discharge gas downstream of the thermo expansion valve to maintain the system integrity and flow during minimum flow conditions.


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Part 1 Technical Description. Section 2 System Description – Hull HVAC. Table of Contents 1.0

2.0

FORWARD SPACE HVAC SYSTEM ............................................................................. 3 1.1

Introduction.......................................................................................................... 3

1.2

Forward Foam Room........................................................................................... 4

1.3

Forward Firepump Rooms................................................................................... 4

1.4

Temporary Refuge Room .................................................................................... 4

1.5

Locker Workshop................................................................................................. 4

1.6

Forward Store...................................................................................................... 4

1.7

Deck Store........................................................................................................... 4

1.8

Lower Void........................................................................................................... 5

1.9

Airlocks ................................................................................................................ 5

1.10

Control and Instrumentation ................................................................................ 5

1.11

ESS and SSDS Interface..................................................................................... 6

1.12

Safeguarding ....................................................................................................... 6

MACHINERY SPACES VENTILATION SYSTEMS ....................................................... 7 2.1

Introduction.......................................................................................................... 7

2.2

Machinery Space Ventilation ............................................................................... 8

2.3

Aft Firepump Ventilation ...................................................................................... 9

2.4

Purifier Room Ventilation................................................................................... 10

2.5

Welding Space and Toilet Ventilation................................................................ 10

2.6

Hazardous Chemical Store HVAC System........................................................ 11

2.7

Paint Store HVAC System................................................................................. 12

2.8

Emergency Generator Room HVAC System..................................................... 12

2.9

IGG Room Ventilation........................................................................................ 13

2.10

Foam/Water Mist Tank Room in 2nd Deck........................................................ 14

2.11

Hydraulic Power-pack Rooms Ventilation ......................................................... 15

2.12

Essential Service Generator Room Ventilation ................................................. 15

2.13

Incinerator Room Ventilation ............................................................................. 16

2.14

Transformer Room Ventilation........................................................................... 16

Part 1 Section 2 System Description – Hull HVAC

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Table of Contents (cont’d)

3.0

2.15

MSBR, Workshop and Store HVAC System (AHU3) ........................................ 16

2.16

Control and Instrumentation .............................................................................. 19

2.17

ESS and SSDS Interface................................................................................... 22

2.18

Safeguarding ..................................................................................................... 22

MAIN HVAC SYSTEM .................................................................................................. 23 3.1

Introduction........................................................................................................ 23

3.2

Common Air Intake............................................................................................ 24

3.3

Chilled Water System ........................................................................................ 25

3.4

Accommodation HVAC System......................................................................... 28

3.5

CCR, CER, PABX and UPS HVAC System ...................................................... 39

3.6

Control and Instrumentation .............................................................................. 44

3.7

ESS Interface .................................................................................................... 51

3.8

Safeguarding ..................................................................................................... 52

TABLE Table 2.1 – Aft Accommodation Equipment ........................................................................... 23 Table 2.2 – Chilled Water Inlet and Outlet Temperature Indicators ....................................... 28 FIGURE Figure 2.1 – HVAC Single Line Diagram Upper Deck Forward.............................................. 53 Figure 2.2 – HVAC Single Line Diagram 2nd Deck Aft .......................................................... 54 Figure 2.3 – HVAC Single Line Diagram Upper Deck Aft ...................................................... 55 Figure 2.4 – HVAC Single Line Diagram A Deck Aft.............................................................. 56 Figure 2.5 – HVAC Single Line Diagram B Deck Aft.............................................................. 57 Figure 2.6 – HVAC Single Line Diagram C Deck Aft.............................................................. 58 Figure 2.7 – HVAC Single Line Diagram D Deck Aft.............................................................. 59 Figure 2.8 – HVAC Single Line Diagram E Deck Aft.............................................................. 60 Figure 2.9 – HVAC Single Line Diagram E Deck Top Aft....................................................... 61 Figure 2.10 – HVAC Single Line Diagram 3rd Deck Aft ......................................................... 62


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1.0

FORWARD SPACE HVAC SYSTEM.

1.1

Introduction The forward spaces are provided with the following HVAC equipment: •

K-1722 Forward Ventilation Supply Fan

•

A-1713 Forward Space Package Air Conditioning (PAC)

•

K-1721 Forward Store Room Exhaust Fan

Refer to Figure 2.1 or to 80471-MSL-11: HVAC SLD Upper Deck Forward. 1.1.1

Forward Space Supply Fan Equipment Details Tag Number:

K-1722

Location:

Port Forward Void Space

Manufacturer:

Thermatrol

Model:

AF630/4/12/40

Driver Rating:

4kW

Capacity:

4600 litres/s

Forward Space Supply Fan K-1722: •

Fan Running 17-YZ-224A

•

Fan Available 17-YZ-224B

•

Remote Start/Stop Fan 17-YZC-224

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. 1.1.2

Forward Space PAC Equipment Details Tag Number:

A-1713

Location:

Starboard Store

Manufacturer:

APAC

Model:

S110 CBX

Driver Rating:

4.6kW

Capacity:

2520 litres/s

A standalone air-cooled package air conditioner, with its own fire damper, is installed in the forward starboard store and supplies a mixture of outside air and recirculated air. The package air conditioner has a hermetic compressor operating on R407C and a tube-type air-cooled condenser, which is cooled by fresh air from Condenser Fans A-1721-K-01A/B/C/D.


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Forward Foam Room The forward foam room is equipped with forced air intake from Forward Space Supply Fan K-1722 through pneumatic Fire Damper 17-FD-176. Exhaust air from the foam room vents to the forecastle deck through Fire Damper 17-FD-177.

1.3

Forward Firepump Rooms The forward firepump rooms are equipped with forced air intake by Forward Space Supply Fan K-1722 through pneumatic Fire Dampers 17-FD-168/172. Exhaust air from the forward firepump rooms is vented to the forecastle deck through Fire Dampers 17-FD-169 and 17-FD-173.

1.4

Temporary Refuge Room PAC A-1713, which is located in the forward store, supplies the temporary refuge room. A-1713 is equipped with an inlet Fire Damper 17-FD-179. Exhaust air from the temporary refuge room vents to the forecastle deck through Fire Damper 17-FD-175.

1.5

Locker Workshop PAC A-1713, which is located in the forward store, supplies the locker workshop. A-1713 is equipped with an inlet Fire Damper 17-FD-179. Exhaust air from the locker workshop vents to the forecastle deck through Fire Damper 17-FD-175.

1.6

Forward Store PAC A-1713, which is located in the forward store, supplies the forward store. A-1713 is equipped with an inlet Fire Damper 17-FD-179. Exhaust air from forward store vents to the forecastle deck through Fire Damper 17-FD-175.

1.7

Deck Store The deck store is equipped with an Exhaust Fan K-1721, venting through Fire Damper 17-FD-167 to the forecastle deck. The inlet is from the forward lifeboat area via a louvre and Fire Damper 17-FD-166.

1.7.1

Deck Store Exhaust Fan Equipment Details Tag Number:

K-1721

Location:

Deck Store

Manufacturer:

Thermatrol

Model:

AF480/4/6/10

Driver Rating:

0.37kW

Capacity:

510 litres/s


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Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Deck Store Exhaust Fan K-1721:

1.8

•


•


•


Lower Void The lower void is supplied with air from Forward Space Supply Fan K-1722 through a volume control damper. Exhaust air from the lower void is vented to the forecastle deck through Fire Damper 17-FD-171.

1.9

Airlocks PAC A-1713, which is located in the forward store, supplies port and starboard airlocks. A-1713 is equipped with an inlet Fire Damper 17-FD-179. Exhaust air from port and starboard airlocks vents to each port and starboard of the forecastle deck through Fire Dampers 17-FD-174 and 17-FD-178.

1.10

Control and Instrumentation

1.10.1

Operation and Control The forward spaces are equipped with a Package Air Conditioner A-1713, which operates independently of the Process Safety Control System (PSCS), except for an Emergency Support System (ESS) interlock. Fans K-1721 and K-1722 in the forward spaces are controlled by the Safety Shutdown System (SSDS) and operate as single units. The operator can start and stop each fan from the Human/Machine Interface (HMI) and each fan has an ESS interlock. The forward fire dampers are divided into groups as follows: •

Forward Firepump Room 1

•

Forward Firepump Room 2

•

Forward Foam Room

•

Temporary Refuge Room

•

Air Conditioned Spaces

•

Deck Store

Fans and fire dampers are controlled from the SSDS. The HMI located in the Central Control Room (CCR) is the primary operator interface. Forward space fans can be totally shut down by the ESS and, once stopped, all fans/dampers are prohibited from starting/opening until inhibits have been removed from the ESS. The control panel incorporates this fan shutdown logic from signals received from the SSDS, with confirmation signals relayed back to the SSDS indicating that the required fan shutdown logic has been completed.


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The forward space ventilation system is fitted with pneumatic fire dampers at those points where ducting penetrates fire-rated walls or decks. These fire dampers have a rating at least equal to the barrier that they are designed to protect so as to maintain the integrity of the space. The fire dampers are controlled via a signal from one or more of the following sources: •

Automatic closure by the PSCS

•

Manual local operation of the solenoid valve

•

Automatic failsafe closure by the melting of a fusible link

Air pressure is supplied to the fire dampers, which maintains them in the open position. The air supply passes through a solenoid valve, air trigger and quick-exhaust valve to the actuator for the damper, which at 4barg overcomes the return-spring force and at 5barg opens the damper. When fully open, an operator arm on the actuator shaft operates the limit switch for open indication at the DCS. Local indication is also provided. If the fusible link melts at 70°C, the quick-exhaust valve opens a larger vent to release the air pressure and the damper closes within 0.5 to 2 seconds.

1.11

ESS and SSDS Interface The ESS will give group or total shutdown commands to the forward HVAC panel depending on the fire and gas conditions. The SSDS will receive the damper closed feedback signals.

1.12

Safeguarding Fire and gas detectors continuously monitor the outside air intakes. The normal arrangement is three smoke detectors and two Infrared (IR) gas detectors, operating on a Two-out-of-three (2oo3) and Two-out-of-two (2oo2) voting system respectively. Both sets of smoke and gas detectors interface with the DCS. In addition, the forward airlock gives alarm indication on the DCS from a single smoke detector and IR gas detector located in the airlock. Confirmed smoke or 60% Lower Explosive Limit (LEL) gas at the intakes results in the automatic closure of the fire dampers and stoppage of the forward space supply fan. These actions are essential to minimise the ingress of smoke or potentially explosive/toxic gas mixtures into the Temporary Refuge (TR) room. Interface between the fire and gas control panel and HVAC control panel operates on a failsafe principle, ie HVAC supply and exhaust fan sets are shut down and fire dampers closed on loss of the control signal, loss of signal to the fire dampers or loss of back-up air supplies from the air accumulator vessel initiate damper closure. In addition, the fire dampers can also be closed manually.


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2.0

MACHINERY SPACES VENTILATION SYSTEMS

2.1

Introduction The machinery spaces ventilation system provides fresh air to all machinery spaces, by means of independent mechanical ventilation systems. Supply fans, two sets of non-reversible (K-1731A/B) and two sets of reversible (K-1732A/B), provide ducted air from separate intakes port and starboard at B Deck level to all machinery areas and levels. Surplus air naturally exhausts through an outlet trunk located in the machinery space casing on B Deck. All air intakes and exhausts provided for m spaces ventilation system are fitted with pneumatically operated fire dampers, which are grouped and controlled by the Fire and Gas System. The machinery spaces ventilation systems are as follows: •

K-1731A and B Machinery Space Port Supply Fans A and B

•

K-1732A and B Machinery Space Starboard Supply Fans A and B

•

K-1733A and B Aft Firepump Room Port Supply Fans A and B

•

K-1733C and D Aft Firepump Room Starboard Supply Fans C and D

•

K-1736 Purifier Room Exhaust Fan

•

K-1734 Welding Space Exhaust Fan

•

K-1735 Toilet Exhaust Fan

•

K-1701 Chemical Store Supply Fan

•

K-1702 Paint Store Room Supply Fan

•

K-1703A and B Cofferdam Exhaust Fans A and B

•

K-1704 Emergency Generator Room Supply Fan

•

K-1705 Emergency Generator Supply Fan

•

K-1718A and B IGG Room Supply Fans A and B

•

K-1719 Foam/Mist Room Supply Fan

•

K-1720 Foam/Mist Room Exhaust Fan

•

A-1704 AHU 3

•

A-1710 MSBR Package Air Conditioner

•

A-1711 Engineering and Electrical Workshop Package Air Conditioner

•

A-1712 Store Room Package Air Conditioner


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Refer to the following:

2.2

•

Figure 2.2 or to 80471-MSL-03: HVAC SLD 2nd Deck Aft

•

Figure 2.3 or to 80471-MSL-04: HVAC SLD Upper Deck Aft

•

Figure 2.4 or to 80471-MSL-05: HVAC SLD A Deck Aft

•

Figure 2.5 or to 80471-MSL-06: HVAC SLD B Deck Aft

•

Figure 2.6 or to 80471-MSL-07: HVAC SLD C Deck Aft

Machinery Space Ventilation Machinery Space Supply Fans K-1731A/B and K-1732A/B are driven by 30kW independent electric motors, each designed to meet 100% of the designed load and supply a maximum of 186,300m3/hr of fresh air to the machinery spaces.

2.2.1

Machinery Space Supply Fans Equipment Details Tag Number:

K-1731A/B

Location:

Upper Deck and 2nd Deck

Manufacturer:

HI PRES

Model:

AQ-1400/578

Driver Rating:

30kW

Capacity:

96,000m3/hr

Tag Number:

K-1732A/B

Location:

Upper Deck and 2nd Deck

Manufacturer:

HI PRES

Model:

AQ-1400/578

Driver Rating:

30kW

Capacity:

96,000m3/hr

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Machinery Space Supply Fans K-1732A/B can be operated in the reverse direction from the Distributed Control System (DCS) to remove any smoke or fumes from the machinery spaces, when required. Fan status indication on the DCS is provided as follows: •

Machinery Space Supply Fan K-1731A/B −

Fan Running 17-YZ-261A/262A

−

Fan Available 17-YZ-261B/262B

−

Remote Start/Stop Fan 17-YZC-261/262


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Machinery Space Supply Fan K-1732A/B −

Fan Running Forward 17-YZ-263A/264A

−

Fan Available for Forward Running 17-YZ-263C/264C

−

Fan Running Reverse 17-YZ-263B/264B

−

Remote Start/Stop 17-YZ-263A/264A

Aft Firepump Ventilation Aft Firepump Supply Fans K-1733A/B (Port) and K-1733C/D (Starboard) are driven by 8.8kW independent electric motors each designed to meet 100% of the designed load, and supply 30,000m3/hr of pre-conditioned air to the aft firepump room.

2.3.1

Aft Firepump Supply Fans Equipment Details Tag Number:

K-1733A/B, K-1733C/D

Location:

Machinery Space 2nd Deck

Manufacturer:

HI PRES

Model:

AQ-800/380

Driver Rating:

8.8kW

Capacity:

30,000m3/hr

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Fan status indication is provided on the DCS as follows: •

•

Aft Port Firepump Supply Fan K-1733A/B −

Fan Running 17-YZC-265A/266A

−


−

Remote Start/Stop Fan 17-YZ-265/266

Aft Starboard Firepump Supply Fan K-1733C/D −

Fan Running 17-YZC-267A/268A

−


−

Remote Start/Stop Fan 17-YZC-267/268


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Purifier Room Ventilation The purifier room is supplied with fresh air through a trunk fitted with Fire Damper 17-FD-261. Used air is removed from the purifier room via a dedicated exhaust trunk fitted with Fire Damper 17-FD-262 and Exhaust Fan K-1736, which discharges to atmosphere on B Deck.

2.4.1

Purifier Exhaust Fan Equipment Details Tag Number:

K-1736

Location:

Purifier Room

Manufacturer:

HI PRES

Model:

AQ-560/380

Driver Rating:

2.2kW

Capacity:

10,000m3/hr

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The purifier room exhaust fan normally operates continuously and fan status indication is provided on the DCS as follows:

2.5

•


•


•


Welding Space and Toilet Ventilation The welding space in the engineering workshop and the toilet are provided with individual exhaust trunks. Exhaust Fans K-1734 and K-1735, which are fitted with non-return flaps, ensure that bad odours and fumes are removed directly from these areas in the machinery space. The exhaust trunk terminates in the machinery space casing on B Deck at a safe location.

2.5.1

Welding Space Fan Equipment Details Tag Number:

K-1734

Location:

Welding Space, Toilet

Manufacturer:

HI PRES

Model:

ADW-400/C6

Driver Rating:

0.75kW

Capacity:

900/320m3/hr

Refer to BON/1SA1379/HIPRES/000001: M/Space Fans and Dampers. Note: This fan normally operates continuously.


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Toilet Exhaust Fan Equipment Details Tag Number:

K-1735

Location:

Welding Space, Toilet

Manufacturer:

HI PRES

Model:

ADW-400/C6

Driver Rating:

0.75kW

Capacity:

900/320m3/hr

Refer to BON/1SA1379/HIPRES/000001: M/Space Fans and Dampers. Note: This fan normally operates continuously.

2.6

Hazardous Chemical Store HVAC System Ventilation to the hazardous chemical store is taken from a fresh air inlet on the upper deck, which is fitted with Fire Damper 17-FD-281 to provide isolation on confirmed fire or gas detection.

2.6.1

Hazardous Chemical Store Supply Fresh air for hazardous chemical store is supplied by one 100% duty supply fan. The used air and any chemical fumes pass through the exhaust trunk and Fire Damper 17-FD-282 to the outside atmosphere for safe dilution. Equipment Details – Hazardous Chemical Store Supply Fan Tag Number:

K-1701

Location:

Hazardous Chemical Store

Manufacturer:

Thermatrol

Model:

AF380/4/6/10EX

Driver Rating:

0.37kW

Capacity:

100 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The hazardous chemical store supply fan is controlled from a local control panel or DCS. Indication and control for hazardous chemical store supply fan is provided on the DCS as follows: •

Supply Fan Remote Start/Stop 17-YZC-274

•

Supply Fan K-1701 Available 17-YZ-274B

•

Supply Fan K-1701 Running 17-YZ-274A


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2.7

Unrestricted

Paint Store HVAC System Ventilation to the paint store is taken from a dedicated fresh air inlet on the upper deck, which is fitted with Fire Damper 17-FD-279 to provide isolation on confirmed fire or gas detection.

2.7.1

Paint Store Supply Fresh air for the paint store is supplied by one 100% duty supply fan. The used air and any paint fumes pass through the exhaust trunk and Fire Damper 17-FD-280 to the outside atmosphere for safe dilution. Equipment Details – Paint Store Supply Fan Tag Number:

K-1702

Location:

Paint Store

Manufacturer:

Thermatrol

Model:

AF380/4/6/10EX

Driver Rating:

0.37kW

Capacity:

100 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The paint store supply fan is controlled from a local control panel or DCS. Indication and control for the paint store supply fan is provided on the DCS as follows:

2.8

•

Supply Fan Remote Start/Stop 17-YZC-275

•


•


Emergency Generator Room HVAC System Ventilation to the emergency generator room is taken from dedicated fresh air inlets on A Deck and B Deck, which are fitted with a filter coalescer and Fire Damper 17-FD-288 to provide isolation on the confirmed detection of fire or gas.

2.8.1

Emergency Generator Room Air Supply Supply Fan K-1704, located in Emergency Generator Room on A Deck, provides fresh air to the room when the generator is not running. Supply Fan K-1705, located on B Deck, provides fresh air to the room for cooling purposes only when the generator is running. This is necessary so the emergency generator can be safely operated. Equipment Details – Emergency Generator Room Supply Fans Tag Number:

K-1704

Location:

Emergency Generator Room

Manufacturer:

Thermatrol

Model:

AF480/4/12/14, AF1250/6/8/28

Driver Rating:

0.55kW, 18.5kW

Capacity:

1000 litres/s


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Tag Number:

K-1705

Location:

B Deck

Manufacturer:

Thermatrol

Model:

AF480/4/12/14, AF1250/6/8/28

Driver Rating:

0.55kW, 18.5kW

Capacity:

21,100 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Supply Fan K-1704 is normally running continuously to provide general ventilation for the space. When the emergency generator is started, Supply Fan K-1705 is started from the HVAC System control panel, the DCS and also from the emergency switchboard. Supply Fan K-1705 is required to provide cooling air to the space when the emergency generator is running. Indication and control for the emergency generator room supply fan is provided on the DCS as follows:

2.8.2

•


•


•

Supply Fan K-1704 Start/Stop 17-YZC-276

•


•

Supply Fan K-1705 Running 17-YZ-277

•

Supply Fan K-1705 Start/Stop 17-YZC-277

Emergency Generator Room Air Exhaust General ventilation air to the emergency generator room when the generator is not running is supplied through an inlet trunk fitted with Fire Damper 17-FD-288 and exhausts through Fire Damper 17-FD-289 to the outside atmosphere. When the generator starts, K-1705 also starts supplying air through Fire Damper 17-FD-285. Exhaust Dampers 17-FD-286 and 17-FD-287 also open to handle the larger volume of air from K-1705.

2.9

IGG Room Ventilation The IGG room is provided with its own independent ventilation system. An air inlet supply is taken by IGG Supply Fans K-1718A/B via mushroom vents on C Deck. Fire Dampers 17-FD-290 and 17-FD-291 are installed in the air inlet ductwork to isolate the IGG room HVAC System in the event of confirmed fire or gas detection. Fresh air is drawn from the mushroom vents on C Deck and passed through the individual fire damper arrangements by two duty/standby 100% capacity Supply Fans K-1718A and K-1718B. Used air from the IGG room is extracted directly outside via Fire Damper 17-FD-292 located on B Deck top.


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2.9.1

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IGG Supply Fans Equipment Details Tag Number:

K-1718A/B

Location:

C Deck

Manufacturer:

Thermatrol

Model:

AF65/4/12/10

Driver Rating:

1.1kW

Capacity:

1200 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The IGG supply fans operate in duty/standby mode and failure of the duty fan automatically starts the standby fan set. Indication and control for the IGG supply fans is provided on the DCS as follows: •

•

2.10

IGG Supply Fan K-1718A −


−


−


IGG Supply Fan K-1718B −


−


−


Foam/Water Mist Tank Room in 2nd Deck The foam/water mist tank room is provided with its own independent ventilation system. An air inlet supply is taken via mushroom vents on upper deck. Fire Damper 17-FD-277 is installed in the air inlet ductwork to isolate the foam/water mist tank room HVAC System in the event of confirmed fire or gas detection. Fresh air is drawn from the mushroom vents on upper deck and passed through the individual fire damper arrangements by one duty 100% capacity rated Supply Fan K-1719. Used air is exhausted to outside by Exhaust Fan K-1720 via Fire Damper 17-FD-278.

2.10.1

Foam/Water Mist Room Supply Fan Equipment Details Tag Number:

K-1719

Location:

Upper Deck

Manufacturer:

Thermatrol

Model:

AF65/4/12/10


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Driver Rating:

1.1kW

Capacity:

1200 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Indication and control for the foam/water mist room supply fans is provided on the DCS as follows: •

2.10.2

Foam/Water Mist Room Supply Fan K-1719 −


−


−


Foam/Water Mist Room Exhaust Fan Equipment Details Tag Number:

K-1720

Location:

Upper Deck

Manufacturer:

Thermatrol

Model:

AF65/4/12/10

Driver Rating:

1.1kW

Capacity:

1200 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Indication and control for the foam/water mist room exhaust fans is provided on the DCS as follows: •

2.11

Foam/Water Mist Room Exhaust Fan K-1720 −


−


−


Hydraulic Power-pack Rooms Ventilation The hydraulic power-pack rooms are supplied with fresh air directly through trunks fitted with Fire Dampers 17-FD-263 and 17-FD-265. Used air is removed from the hydraulic power-pack rooms to machinery space 5th Deck via Fire Dampers 17-FD-264 and 17-FD-266.

2.12

Essential Service Generator Room Ventilation The essential service generator room is supplied with fresh air directly through trunk fitted with a Fire Damper 17-FD-267. Used air is removed from the essential service generator room to machinery space 3rd Deck via Fire Damper 17-FD-268.


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2.13

Unrestricted

Incinerator Room Ventilation The incinerator room is supplied with fresh air directly through a trunk fitted with Fire Damper 17-FD-269. Used air is removed from the incinerator room to machinery space 3rd Deck via Fire Damper 17-FD-270.

2.14

Transformer Room Ventilation The transformer room is supplied with fresh air directly through a trunk fitted with Fire Damper 17-FD-271. Used air is removed from the transformer room to machinery space 2nd Deck via Fire Damper 17-FD-272.

2.15

MSBR, Workshop and Store HVAC System (AHU3) Air Handling Unit A-1704, located in the machinery space of the 2nd Deck, is a 100% duty AHU which provides cooled fresh air to the LV switchboard rooms, workshops and stores areas. A-1704 fresh air inlet is the same as the inlet for the accommodation HVAC System through the B Deck air inlet or the high inlet ducting from C Deck. Both inlets have louvred grilles designed for 100% capacity. Supply air enters A-1704 through flexible connections and pneumatic Shut-off Damper 17-SD-058 and Fire Damper 17-FD-104. The Main Switchboard Room (MSBR), workshop and engineer store room each have a standalone water-cooled Package Air Conditioner A-1710/1711/1712, respectively to supply recirculated air.

2.15.1

MSBR, Workshop and Store HVAC System Air Handling Units Equipment Details Tag Number:

A-1704

Location:

Machinery Space 2nd Deck

Manufacturer:

DES

Power:

18.5kW

Capacity

6230 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Manual dampers are installed in the recirculated air intakes from LV switchboard room, workshops and stores. The mixed air passes through panel filters prior to cooling. Centrifugal Supply Fan K-1704-K-01 passes the air over the chilled water-cooling coils and discharges to the LV switchboard rooms, workshops and store areas through dampers. Control of Air Handling Unit A-1704 is from Local Control Panel A-1704-CP-01 or from the DCS. Selection of local or remote control is from the local control panels. In local control mode, the AHU and supply fans can be started and stopped from the local panel. This operation may also be carried out from the DCS when the AHU is selected to operate in remote mode.


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2.15.2

Unrestricted

2nd Deck Machinery Spaces Air from Air Handling Unit A-1704 is supplied directly via dampers into the supply ducting for the machinery spaces on the 2nd Deck. The supply trunk to the machinery spaces is fitted with the following temperature and pressure transmitters: •

17-TT-015 LV/Workshop (WS) Supply Air Temperature

•

17-PT-019 A-1704 Supply Air Pressure

Fresh air from the HVAC supply trunk is also supplied directly to the following spaces: •

LV switchboard room via a Fire Damper 17-FD-101, Variable Air Volume (VAV) Diffuser 17-FCD-055 and Flow Controller 17-FC-055

•

Engineer workshop and instrument/electric workshop via VAV Diffuser 17-FCD-056 and Flow Controller 17-FC-056

•

Machinery space store via VAV Diffuser 17-FCD-057 and Flow Controller 17-FC-057

Used air from the 2nd Deck LV switchboard rooms, workshops and store is led away to the outside non-air conditioned machinery spaces via Pressure Control Damper A-1701-Z-02, A-1701-Z-07 and Fire Damper 17-FD-103. The air return duct from LV switchboard rooms to the AHU is fitted with a Fire Damper 17-FD-102. A Temperature Transmitter 17-TT-016 is sited in the trunk to measure the return air temperature from the LV switchboard rooms and a humidity eliminator is also sited in the trunk to eliminate the humidity of the return air to the AHU. The air return duct from engineer workshop and instrument/electrical workshop to the AHU is fitted with Pressure Control Damper A-1701-Z-05 and Temperature Transmitter 17-TT-017 located in the trunk to monitor the return air temperature. The air return duct from store to the AHU is fitted with Pressure Control Damper A-1701-Z-03 and Temperature Transmitter 17-TT-017 is located in the trunk to monitor the return air temperature. 2.15.3

MSBR PAC Equipment Details Tag Number:

A-1710

Location:

MSBR

Manufacturer:

APAC

Model:

S85 WC/BV

Driver Rating:

6.48kW

Capacity:

4860 litres/s


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Standalone water-cooled Package Air Conditioner A-1710 is installed in the MSBR to supply recirculated air. A-1710 has a hermetic compressor operating on R407C and a tube-type water-cooled condenser which is cooled by low temperature fresh water from Central Freshwater Coolers E-4101A/B via manual isolation valves 41-GBV-002/001. 2.15.4

Engineer and Electrical Workshop PAC Equipment Details Tag Number:

A-1711

Location:

Engineer and Electrical Workshop

Manufacturer:

APAC

Model:

S11 CWV

Driver Rating:

1.09kW

Capacity:

650 litres/s

Standalone water-cooled Package Air Conditioner A-1711 is installed in the engineer and electrical workshop to supply recirculated air. A-1711 has a hermetic compressor operating on R407C and a tube-type water-cooled condenser which is cooled by low temperature fresh water from Central Freshwater Coolers E-4101A/B via manual isolation valves 41-GBV-005/006. 2.15.5

Engineering Store PAC Equipment Details Tag Number:

A-1712

Location:

Engineering Store

Manufacturer:

APAC

Model:

S18 CWV

Driver Rating:

1.34kW

Capacity:

1000 litres/s

Standalone water-cooled Package Air Conditioner A-1712 is installed in the engineering store to supply recirculated air. A-1712 has a hermetic compressor operating on R407C and a tube-type water-cooled condenser which is cooled by low-temperature freshwater from Central Freshwater Coolers E-4101A/B via manual isolation valves 41-GBV-003/004.


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2.15.6

Unrestricted

Cofferdam Extract System The cofferdam is provided with its own independent ventilation system. An air inlet supply is taken via Fire Damper 17-FD-283, which is installed in the air inlet ductwork. Air is exhausted to outside by Exhaust Fans K-1703A/B via Fire Damper 17-FD-284. Equipment Details – Cofferdam Exhaust Fan Tag Number:

K-1703A/B

Location:

Cofferdam

Manufacturer:

Paramount

Model:

AF630/4/9-9/32/5

Driver Rating:

2.2kW

Capacity:

3000 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The cofferdam exhaust is controlled from a local control panel or DCS. Indication and control for the cofferdam exhaust fan is provided on the DCS as follows: •

Duty exhaust fan remote start/stop 17-YZC-215/216

•

Fan running

•

Fan available

2.16


2.16.1

Operation and Control Machinery Spaces The machinery spaces have a separate ventilation system, independent of the DCS. Fans in the machinery spaces are controlled by the SSDS and operate as single units, either non-reversible or reversible. The operator can start and stop each fan from the CCR. All fans have a process interlock with associated fire dampers and/or changeover flaps, eg machinery space port supply fan K-1731A may only run if Fire Dampers 17-FD-151, 17-FD-255 and 17-FD-256 are open. If any fire damper is not open, the fan is stopped by the SSDS and prevented from starting. The fire dampers will be controlled from the ESS and actions will be shown on the Hull Cause and Effect BON-SHI-008-E-00030. There is no control from the CCR HMI. The changeover flaps will be set from the HMI according to which fan is to be started. Indication of the position of the changeover flaps will be on the HVAC displays. The DCS contains all the necessary operator interface controls and logic to control, monitor and provide annunciation for the main equipment included in the machinery spaces forced ventilation system.


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Fire dampers are opened by control air pressure, via a solenoid valve, and are designed to fail safe to the closed position. The ESS shuts all dampers, either individually or in groups, by de-energising the relevant solenoid valve, which vents the air pressure. In the event of fire, the supply and exhaust ducts for the engine room can be closed by remotely operated pneumatic fire dampers. DCS logic is provided for selecting duty/standby function for the machinery space supply fans, aft firepump supply fans and IGG room supply fans. The machinery spaces forced ventilation system is totally shut down by the FPSO ESS and Fire and Gas Systems in the event of an emergency. Once stopped, all machinery spaces forced ventilation system equipment is prohibited from starting/opening until all inhibits have been removed from the ESS and SSDS. 2.16.2

Machinery Space Port Supply Fans K-1731A/B Machinery Space Port Supply Fans K-1731A/B are inhibited from starting until the following conditions are met: •

17-FD-251 Machinery Space Intake Damper Open – 17-ZZ-251A

or •


and •

17-FD-255 Machinery Space Exhaust Damper Open – 17-ZZ-255A

and •


Starting of machinery space supply fans K-1731A/B is by activation of 17-YZ-261/262 from the DCS. The fans are also stopped if the individual supply damper or both exhaust dampers are shut and a STOP signal is received from the SSDS, or a trip signal is received from the ESS. 2.16.3

Machinery Space Starboard Supply Fans K-1732A/B Machinery Space Supply Fans K-1732A/B are inhibited from starting until the following conditions are met by activating Solenoid Valve 8208-FYV-AOA-253: •


or •


and •



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and •


Forward starting of machinery space supply fans K-1732A/B is by activation of 17-YZC-263A/264A from the SSDS. Reverse starting of the fans is by activation of 17-YZC-263B/264B from the SSDS. The fans are also stopped if the individual supply damper or both exhaust dampers are shut and a STOP signal is received from the SSDS, or a trip signal is received from the ESS. 2.16.4

Aft Firepump Supply Fans K-1733A/B and K-1733C/D The firepump supply fan is inhibited from starting until the following conditions are met: •

17-FD-257/259 Aft Firepump Supply Damper Open

and •

17-FD-258/260 Aft Firepump Exhaust Damper Open

and •

Z-1710A/B/C/D Aft Firepump Supply Fan Changeover Guide Flap is Open

On starting the duty Aft Firepump Supply Fan K-1733A/B or K-1733C/D by 17-YZC-265/266 or 17-YZC-267/268 at the SSDS, the changeover damper is opened via 17-ZZ-257A/258A or 17-ZZ-259A/260A respectively. If the changeover damper fails to open or closes during normal operation, the duty Aft Firepump Supply Fan, K-1733A/B or K-1733C/D is stopped via 8310-YZ-M02-265/266 (port) and via 8310-YZ-M02-267/268 (starboard). The duty firepump supply fan is also stopped if both supply or exhaust dampers shuts, or if a stop signal is received from the DCS. On stopping the firepump supply fan, the changeover damper is closed. 2.16.5

Pneumatic Fire Dampers The machinery spaces HVAC System is fitted with pneumatic fire dampers at points where ducting penetrates fire rated walls or decks. These fire dampers have a rating of at least equal to the barrier that they are designed to protect so as to maintain the integrity of the space. The fire dampers are controlled via a signal from one or more of the following sources: •

Automatic closure by the ESS

•

Manual local operation of the solenoid valve

•

Automatic failsafe closure by the melting of a fusible link

Air pressure is supplied to the fire dampers, which maintains them in the open position. The air supply passes through a solenoid valve, air trigger and quick-exhaust valve to the actuator for the damper, which overcomes the return spring force at 4barg and opens the damper at 5barg.


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When fully open, an operator arm on the actuator operates the limit switch for open indication at the DCS. Local indication is also provided. If the fusible link melts at 68°C, the quick exhaust valve opens a larger vent to release the air pressure and the damper closes within 0.5 to 2 seconds. 2.16.6

Changeover Dampers Aft Firepump Supply Fans K-1733A/B and K-1733C/D are fitted with automatic Changeover Dampers Z-1710A/1710B and Z-1710C/1710D respectively. These changeover dampers open and close automatically on start-up and shutdown of the duty/standby machinery space and firepump supply fans by the operation of the solenoid valves.

2.17

ESS and SSDS Interface The machinery vent fans and the fire dampers are fully controlled from SSDS. The required fans can be manually started from the SSDS workstation. These fans can also be started locally. Upon activation the ‘Local start request’ signal will be received by SSDS and SSDS will start the fan. During normal operation, all machinery fire dampers are controlled from SSDS and their feedback is also wired to SSDS. All machinery ventilation fans and fire dampers are provided with ESS shutdown interlocks. The fire dampers are grouped and each group is provided with a common solenoid valve, which provides the air supply. On de-energising this solenoid valve by ESS, the group dampers will be shut down.

2.18

Safeguarding The air from the machinery spaces fans, ie two sets of non-reversible Supply Fans K-1731A/B and two sets of reversible Supply Fans K-1732A/B, is continuously monitored by fire and gas detectors installed at the air intakes duct from B Deck. The normal arrangement is three smoke detectors and two IR gas detectors, operating on a 2oo3 and 2oo2 voting system respectively. Both sets of smoke and gas detectors interface with the DCS. Confirmed smoke or 60% LEL gas at the intakes results in the automatic closure of the fire dampers and stopping of the HVAC fans. These actions are essential to minimise the ingress of smoke or potentially explosive/toxic gas mixtures into the machinery spaces. Both machinery space and aft firepump supply fan sets are shut down and fire dampers close on loss of control signal. Loss of signal to the dampers or loss of backup air supplies from the air accumulator vessel, keeping them open, initiate damper closure. In addition, the fire dampers can also be closed manually.


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3.0

MAIN HVAC SYSTEM

3.1

Introduction

Unrestricted

The main HVAC System provides fresh air to the accommodation, stores and control room areas of the Bonga FPSO, by means of three independent HVAC systems. Air Handling Units A-1702A and B provide ducted air from common air intakes at A and C Decks to the accommodation deck areas. Recycled air from the accommodation deck areas is returned to the AHUs through a number of air grilles on each deck. Air Handling Unit A-1703 provides ducted air from common air intakes to the Central Equipment Room (CER), CCR, PABX and Uninterruptible Power Supply (UPS). A-1704 located in the machinery spaces 2nd Deck provide fresh air to the main LV switchboards, workshops and stores areas. Recycled air from the CER, CCR and UPS areas, LV switchboards, workshops and stores is returned to the Air Handling Units (AHUs) through a number of air grilles on each deck. All air intakes and exhausts provided for the main HVAC System are fitted with pneumatically operated fire dampers, which are grouped and controlled by the Fire and Gas System. Equipment Number A-1704A/B

Equipment Description Chiller Unit A/B Duty/Standby

A-1704A-KM-01A/B/C

Chiller Unit A Compressor A/B/C

A-1704B-KM-01A/B/C

Chiller Unit B Compressor A/B/C

P-1703A/B

Chilled Water Pumps A/B Duty/Standby

A-1702A/B

AHU1A/B

K-1706

Smoking Coffee Shop Exhaust Fan

K-1707A/B

Laundry Supply Fan A/B Duty/Standby

K-1708A/B

Laundry Exhaust Fan A/B Duty/Standby

K-1712A/B

Galley Supply Fan A/B Duty/Standby

K-1713A/B

Galley Exhaust Fan A/B Duty/Standby

K-1711

Gymnasium Exhaust Fan

K-1717

Smoking Lounge Exhaust Fan

K-1714A/B

Hospital Exhaust Fan A/B Duty/Standby

K-1715A/B

Sanitary Exhaust Fan A/B Duty/Standby

K-1710A/B

TER Battery Room Exhaust Fan A/B Duty/Standby Table 2.1 – Aft Accommodation Equipment


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Equipment Number

Equipment Description

K-1716

Lift-shaft Supply Fan

A-1703

AHU 2

K-1709A/B

UPS Battery Room 101 Exhaust Fan A/B Duty/Standby

A-1705

CER Package Air Conditioner

A-1706

CCR Package Air Conditioner

A-1707

PABX Package Air Conditioner

A-1708

UPS Room Package Air Conditioner

A-1709

TER Package Air Conditioner

CP-1701

Main HVAC System UCP

Table 2.1 – Aft Accommodation Equipment (cont’d) Refer to:

3.2

•

Figure 2.2 or to 80471-MSL-03 HVAC SLD 2nd Deck Aft

•

Figure 2.3 or to 80471-MSL-04 HVAC SLD Upper Deck Aft

•

Figure 2.4 or to 80471-MSL-05 HVAC SLD A Deck Aft

•

Figure 2.5 or to 80471-MSL-06 HVAC SLD B Deck Aft

•

Figure 2.6 or to 80471-MSL-07 HVAC SLD C Deck Aft

•

Figure 2.7 or to 80471-MSL-08 HVAC SLD D Deck Aft

•

Figure 2.8 or to 80471-MSL-09 HVAC SLD E Deck Aft

•

Figure 2.9 or to 80471-MSL-10 HVAC SLD E Deck Top Aft

•

Figure 2.10 or to 80471-MSL-02 HVAC SLD 3rd Deck Aft

Common Air Intake The air handling unit common air intake from B Deck aft is fitted with a panel filter coalescer positioned next to Fire Damper 17-FD-127 on the intake.

3.2.1

Filter Coalescer The filter consists of a 50mm thick media pad, formed into a series of vees, to remove water, salt and any airborne particles from the incoming airflow. This is essential as the main HVAC System is for the accommodation module, LV switchboard room and CCR containing electronic and electrical equipment. The filter coalescer is cleaned by removing the dirty filter and rinsing with water. Alternatively the filter can be replaced with a new disposable filter. Most of the water entering the main HVAC System air intake at the mushroom vent is removed via a drain valve located at the bottom of the vent. However, the filter coalescer is provided with a small drain fitted to remove any remaining freewater from the incoming airflow.


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3.3

Unrestricted

Chilled Water System Chilled water produced by the Chilled Water Units A-1704A and B is circulated through the cooling coils for all four AHUs included in the main HVAC System. This allows chilled water to pass through or bypass the AHUs to maintain the desired temperature and humidity of the air supply to the accommodation, stores and control room areas.

3.3.1

Chilled Water Units Equipment Details Tag Number:

A-1704A/B

Location:

Machinery Space 3rd Deck

Manufacturer:

York International

Power:

133kW (for three compressors)

Cooling Water In:

36°C

Chilled Water In:

12.5°C

Chilled Water Out:

6.5°C

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Fresh water at 36°C is circulated through the two 100% duty/standby chillers to condense the R407C refrigerant in the system. The freshwater supply to the condensers is via manual isolation valves 17-BUV-301 and 17-BUV-303. Return from the condensers is via non-return valves 17-CHV-301, 17-CHV-302 and manual valves 17-BUV-302 and 17-BUV-304. Refrigerant is circulated through three independent circuits in each unit by three dedicated compressors. Chilled water passes through the evaporators via manual inlet valves 17-BUV-305 and 17-BUV-307, inlet shutdown valves 17-ZCV-004 and 17-ZCV-006 and manual outlet valves 17-BUV-306 and 17-BUV-308. The inlet and outlet circuits of the condensers and evaporators are monitored by locally mounted temperature and pressure indicators, flow switches, and temperature transmitters as follows: •

A-1704A Chilled Water Flow Switch 17-FSL-001

•

A-1704A Cooling Water Flow Switch 17-FSL-002

•

A-1704A Chilled Water Inlet Temperature Indicator 17-TI-103

•

A-1704A Chilled Water Outlet Temperature Indicator 17-TI-104

•

A-1704A Cooling Water Inlet Temperature Indicator 17-TI-107

•

A-1704A Cooling Water Outlet Temperature Indicator 17-TI-108

•

A-1704A Cooling Water Inlet Pressure Indicator 17-PI-039

•

A-1704A Cooling Water Outlet Pressure Indicator 17-PI-040

•

A-1704B Chilled Water Flow Switch 17-FSL-003

•

A-1704B Cooling Water Flow Switch 17-FSL-004


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A-1704B Chilled Water Inlet Temperature Indicator 17-TI-111

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A-1704B Chilled Water Outlet Temperature Indicator 17-TI-112

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A-1704B Cooling Water Inlet Temperature Indicator 17-TI-115

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A-1704B Cooling Water Outlet Temperature Indicator 17-TI-116

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A-1704B Cooling Water Inlet Pressure Indicator 17-PI-043

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A-1704B Cooling Water Outlet Pressure Indicator 17-PI-044

The chillers are controlled locally from the HVAC System control panel, which also monitors the water flow. Remote control and indication is provided on the DCS as follows:

3.3.2

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A-1704A Running 17-YZ-230/1

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Chilled Water Inlet Temperature Transmitter 17-TT-101

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Chilled Water Outlet Temperature Transmitter 17-TT-102

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Cooling Water Inlet Temperature Transmitter 17-TT-105

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Cooling Water Outlet Temperature Transmitter 17-TT-106

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A-1704B Running 17-YZ-233/4

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Chilled Water Inlet Temperature Transmitter 17-TT-109

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Chilled Water Outlet Temperature Transmitter 17-TT-110

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Cooling Water Inlet Temperature Transmitter 17-TT-113

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Cooling Water Outlet Temperature Transmitter 17-TT-114

Chilled Water Pumps Equipment Details Tag Number:

P-1703A/B

Location:

Machinery Space 3rd Deck

Manufacturer:

Blakers

Model.

150L-350-T41A

Power:

30kW

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Chilled water from the chillers is circulated around the AHU cooling coils by one of the two 100% duty/standby centrifugal Chilled Water Pumps P-1703A/B. Pump suction is via manual valves 17-BUV-309 and 17-BUV-311 respectively. Discharge is via Check Valve 17-CHV-305 and Manual Valve 17-BUV-310, and Check Valve 17-CHV-306 and Manual Valve 17-BUV-312 respectively. Suction strainers S-1701A and B are provided for the chilled water pumps and are equipped with Drain Valves 17-BLV-312 and 17-BLV-316 respectively. Pressure indication for suction, discharge and strainer differential across the chilled water pumps is provided by Pressure Gauges 17-PI-046/047/048 for pump P-1703A and by Pressure Gauges 17-PI-049/050/051 for pump P-1703B.


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Pressure Differential Switch 17-PDS-045 is fitted across the suction and discharge side of the chilled water pumps. The Differential Pressure (DP) switch can be isolated for bleeding down by closing Block Valves 17-BLV-317 and 17-BLV-318. Once the DP switch is isolated, Bleed Valves 17-BLV-319 and 17-BLV-320 can be opened to depressurise and drain the instrument. The chilled water pumps are controlled locally from their dedicated local control panels with auto changeover/indication provided on the DCS as follows:

3.3.3

•

P-1703A Pump Running – 17-YZ-236

•

P-1703B Pump Running – 17-YZ-237

Dosing Pot and Expansion Tank Chemical Dosing Pot V-1702 is used for adding corrosion inhibitor to the chilled water system. The dosing pot is provided with Filling Valve 17-BLV-324, Inlet and Outlet Valves 17-BLV-321 and 17-BLV-322, Drain Valve 17-BLV-323, and gooseneck Vent Valve 17-BLV-325. Expansion Tank V-1701, which is fitted with Drain Valve 17-BLV-347, allows for any pressure fluctuations in the chilled water system. The system pipework is supplied with a Safety Relief Valve 17-RV-301 for overpressure protection. Air Eliminator 17-SV-313, Filling Valve 17-BLV-326 and Backflow Preventer 17-SV-301 are also fitted to the expansion tank, to prevent contamination of the potable water system and allow topping-up of the expansion tank as required.

3.3.4

Chilled Water Supply to the AHUs Chilled water is continuously circulated through the pipework system and around the AHU unit cooling coils by the chilled water pumps. Three-way control valves are provided on each cooling unit to pass the chilled water through or bypass the AHU coils as necessary to maintain the desired temperature/humidity conditions of the supply air. Chilled water is supplied to the AHU cooling coils through manual Inlet Valves 17-BUV-313, 17-BUV-314, 17-BUV-315 and 17-BUV-316. Three-way automatic Temperature Control Valves 17-TCV-006, 17-TCV-009, 17-TCV-018 and 17-TCV-021 maintain the desired temperature and humidity conditions, taking flow from the units and through the bypass valves as required. Flow through automatic Shut-off Valves 17-ZCV-001 and 17-ZCV-002, which are controlled from the local control panels and manual Outlet Valves 17-SV-303, 17-SV-305, 17-SV-307 and 17-SV-309, is routed back to the chilled water pumps. Chilled water inlet and outlet temperatures are monitored on the local control panel and DCS as shown in Table 2.2.


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AHU

Inlet Temperature

Outlet Temperature

A-1702A

17-TI-007

17-TI-008

A-1702B

17-TI-010

17-TI-011

A-1703

17-TI-019

17-TI-020

A-1704

17-TI-022

17-TI-023

Table 2.2 – Chilled Water Inlet and Outlet Temperature Indicators

3.4

Accommodation HVAC System Air Handling Units A-1702A and B, located in the A Deck air handling room, are 100% duty/standby AHUs, which provide pre-conditioned fresh air to all accommodation deck areas. The fresh air inlet to A-1702A and A-1702B is through B Deck air inlet and high inlet ducting from C Deck. Both inlets are louvred grilles designed for 100% capacity. B and C Decks air inlets are protected with pneumatic Fire Dampers 17-FD-127 and 17-FD-138 respectively and inlet Temperature Transmitter 17-TT-001 is installed in the inlet ducting to monitor the air inlet temperature. Supply air enters A-1702A and A-1702B through flexible connections and pneumatic Shut-off Dampers 17-SD-051 and 17-SD-054 respectively.

3.4.1

Accommodation HVAC System Air Handling Units Equipment Details Tag Number:

A-1702A/B

Location:

A Deck Air Handling Room

Manufacturer:

Direct Engineering Services (DES)

Power:

55kW

Capacity:

13,000 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The systems are designed to provide a mixture of outside air from the fresh air intakes on B and C Decks and recirculated air to the accommodation areas. Pneumatic Shut-off Dampers 17-SD-051 and 17-SD-054 are installed in the fresh air intakes from outside, and 17-SD-052 and 17-SD-055 are installed in the recirculated air intakes from the accommodation controls the air mixture to the AHUs. The mixed air passes through panel filters prior to cooling. Centrifugal Supply Fans A-1702A-K-01 and A-1702B-K-01 pass the air over the chilled water cooling coils and discharge to the deck areas through Volume Control Dampers 17-FCD-051 and 17-FCD-052, respectively. Control of the Air Handling Units A-1702A and A-1702B is from Local Control Panels A-1702A-CP-01 and A-1702B-CP-01 respectively, or from the DCS.


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Selection of local or remote control is made from the local control panels. In local control mode, the AHUs can be started and stopped, duty selection made and supply fans started and stopped from the local panel. This operation may also be carried out from the DCS when the AHU is selected to operate in remote mode. The AHUs are fitted with an automatic changeover facility on failure of the running unit. 3.4.2

A Deck and Upper Deck Air from AHUs A-1702A and B is supplied directly by trunk and pneumatically operated Fire Damper 17-FD-121 into the supply ducting for A Deck and the Upper Deck. A Constant Volume Diffuser 17-FCD-051/052 and Fire Damper 17-FD-123 directs the air supply into the stairwell. Fresh air from the supply duct is also supplied directly via a Fire Damper 17-FD-112 and trunk to the following spaces: •

Valve cabinet room via Constant Volume Diffuser A-1702-A-01C

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Men’s changing room via Constant Volume Diffuser A-1702-A-01D

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Passageways via Constant Volume Diffuser A-1702-A-01-E

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Safety gear room and air locker via Constant Volume Diffuser A-1702-A-01-G

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Non-smoking coffee shop, smoking coffee shop and air locker via a Constant Volume Diffuser A-1702-A-01H

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Deck workshop via Constant Volume Diffuser A-1702-A-01A on Upper Deck

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Dirty laundry and dirty linen locker via a Constant Volume Diffuser A-1702-A-01J

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Clean laundry, passage 201 and airlock 203 via a Constant Volume Diffuser A-1702-A-01K

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Women’s changing room, deck store, male WC via Constant Volume Diffuser A-1702-A-01F

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Stair via Constant Volume Diffuser A-1702-A-01I

Used air from airlock 203 is extracted directly to the weather via Pressure Control Damper A-1702-Z-02 and Fire Damper 17-FD-116. Used air from the women’s changing room, men’s changing room, deck store and cleaning locker, and valve control room is extracted directly by trunk to the sanitary exhaust fans on E Deck top. Air recirculated from the non-smoking coffee shop and safety gear room, passes directly through a return trunk and Fire Damper 17-FD-120 to the return duct and through the main Return Fire Damper 17-FD-122 to the A Deck air handling room. Smoking Coffee Shop Exhaust System Used air from the smoking coffee shop is exhausted to the outside via an exhaust fan. Fire Damper 17-FD-119 is installed in the extract system to provide isolation on the detection of fire or gas.


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Equipment Details – Smoking Coffee Shop Exhaust Fans Tag Number:

K-1706

Location:

Smoking Coffee Shop

Manufacturer:

Systemaire

Model:

TD-800/200N-Lo

Driver Rating:

0.08kW

Capacity:

95 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Smoking coffee shop exhaust fan K-1706 is controlled from the HVAC System control panel or DCS. Indication and control for the smoking coffee shop extract fans is provided on the DCS as follows: •

Remote Start/Stop 17-HCH-012

•

Exhaust Fan K-1706 Running 17-YZ-221

Laundry Room In addition to the air supply direct from the accommodation HVAC System AHUs, two 100% duty/standby fans (K-1707A and B) supply air from the fresh air inlet trunk to the laundry. Equipment Details – Laundry Supply Fans Tag Number:

K-1707A and B

Location:

Weather Deck

Manufacturer:

Thermatrol

Model:

AF630/4/12/10

Driver Rating:

0.55kW

Capacity:

770 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The fans supply air directly to the laundry by trunk through backflow dampers and Fire Damper 17-FD-110 to both the clean and dirty laundry rooms. Used air is removed from the laundry by a dedicated extraction trunk. Fumes are exhausted via Fire Damper 17-FD-111 to the outside. These exhaust fans are 100% duty/standby axial flow fans fitted with backflow dampers. Equipment Details – Laundry Exhaust Fans Tag Number:

K-1708A/B

Location:

Weather Deck

Manufacturer:

Thermatrol

Model:

AF630/4/12/10

Driver Rating:

0.59kW

Capacity:

1390 litres/s


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Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The laundry supply and exhaust fans are set up to operate in duty/standby mode and controlled from the HVAC System control panel or DCS. Indication and control for the laundry supply and exhaust fans is provided on the DCS as follows: •

Supply Fan K-1707A/B Remote Start/Stop – 17-HCH-026

•

Supply Fan K-1707A Running – 17-YZ-207

•

Supply Fan K-1707B Running – 17-YZ-208

•

Exhaust Fan K-1708A/B Remote Start/Stop – 17-HCH-013

•

Exhaust Fan K-1708A Running – 17-YZ-209

•

Exhaust Fan K-1708B Running – 17-YZ-210

Safety Gear Room AHUs A-1702A/B provide fresh air directly to the safety gear room, which is fitted with Constant Volume Diffuser A-1702-A-01G. Used air from the safety gear room returns to the return air trunk via Fire Damper 17-FD-120. Deck Workshop A-1702A and B provide fresh air directly to the deck workshop, which is fitted with Constant Volume Diffuser A-1702-A-01A. Used air from the workshop is led away to the outside via Pressure Control Damper A-1702-Z-01 and Fire Damper 17-FD-109. Emergency Switchboard Room A-1702A and B provide fresh air directly to the emergency switchboard room, which is fitted with Fire Damper 17-FD-107 via VAV Diffuser 17-FCD-058. Used air from emergency switchboard room is returned to the AHU room via Fire Damper 17-FD-108. 3.4.3

B Deck HVAC Conditioned fresh air from the A Deck AHUs A-1702A and B is supplied directly through the trunk from the supply duct to B Deck via Fire Damper 17-FD-136. Used air from B Deck is led away to the outside via Fire Damper 17-FD-135. Fresh air from the supply duct is also supplied directly via sections of trunk to the following spaces: •

Conference room via VAV Diffuser 17-FCD-071 and Flow Controller 17-FC-071

•

OIM’s office via VAV Diffuser 17-FCD-070 and Flow Controller 17-FC-070

•

Document room 317 via VAV Diffuser 17-FCD-077 and Flow Controller 17-FC-077

•

Clean gear locker, airlock 302 and passage 301 via Constant Volume Diffuser A-1702-A-01L

•

Airlock 303 and passage 331 via Constant Volume Diffuser A-1702-A-01M

•

Office 310 via VAV Diffuser 17-FCD-072 and Flow Controller 17-FC-072

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Office 322/3 via VAV Diffuser 17-FCD-081 and Flow Controller 17-FC-081

Used air from B Deck is extracted directly by trunk to the sanitary exhaust fans on E Deck top. Air recirculated from the offices, passageway and document control room, passes directly through a return trunk and Fire Damper 17-FD-137 to the return duct. A temperature transmitter is sited in the trunk before the fire damper to measure the return air temperature. Used air from airlock 302 and passage 301 is extracted via Pressure Control Damper A-1702-Z-04 and Fire Damper 17-FD-129. Used air from airlock 303 and passage 331 is extracted via Pressure Control Damper A-1702-Z-05 and Fire Damper 17-FD-130. 3.4.4

C Deck HVAC Conditioned fresh air from the A Deck AHUs A-1702A and A-1702B is supplied directly through the trunk from the supply duct to C Deck via Fire Damper 17-FD-148. Used air from C Deck is led away to the outside via Fire Damper 17-FD-141. Fresh air from the supply duct is supplied directly via sections of trunk to the following spaces: •

Smoking lounge 403 via Constant Volume Diffuser A-1702-A-010

•

Non-smoking lounge 404 via VAV Diffuser 17-FCD-082 and Flow Controller 17-FC-082

•

Recreation 405 room via VAV Diffuser 17-FCD-083 and Flow Controller 17-FC-083

•

Mess room 407 and bonded store 424 via VAV Diffusers 17-FCD-084 and 17-FCD-085, and Flow Controllers 17-FC-084 and 17-FC-085

•

Servery 407A room via a VAV Diffuser 17-FCD-086 and Flow Controller 17-FC-086

•

Galley 408 and preparation room 409 via Constant Volume Diffusers A-1702-A-01P, A-1702-A-01Q and A-1702-A-01R

•

Dry provision store 410 via Constant Volume Diffuser A-1702-A-01S

•

CGL, WC, passage 401 and passage 425 via Constant Volume Diffuser A-1702-A-01N


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Gymnasium 415 via Constant Volume Diffuser A-1702-A-01T

•

Quiet lounge room 416 via VAV Diffuser 17-FCD-087 and Flow Controller 17-FC-087

Used air from the bonded store, dry provision store, lobby and WC is exhausted directly by trunk to the sanitary exhaust fans located on E Deck top. Air recirculated from the recreation room, mess room, passage 425, ron-smoking lounge and the quiet lounge passes directly through the return trunk and Fire Damper 17-FD-149 to the return duct. A temperature transmitter is sited in the trunk upstream of the fire damper to measure the return air temperature. Mess Room and Servery Room Relief air from these spaces is led away directly to the outside via Pressure Damper A-1702-Z-08 and Fire Damper 17-FD-142. Airlock and Passage 401 Used air from this space is led directly to the outside via Pressure Damper A-1702-Z-07 and Fire Damper 17-FD-139. Galley Galley Hood A-1715 is supplied with fresh air directly from dedicated supply fans situated outside on C Deck. Equipment Details – Galley Supply Fans Tag Number:

K-1712A/B

Location:

C Deck outside the galley

Manufacturer:

Thermatrol

Model:

PF500-AF

Driver Rating:

3.0kW

Capacity:

2260 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. Galley Supply Fans K-1712A and B are two 100% duty/standby centrifugal fans supplying 2260 litres/s of air to the extract hood for the galley via backflow dampers, dedicated trunk and Fire Damper 17-FD-144. Dirty air is extracted from the galley through a manual volume control damper installed in the canopy hood. The dirty air extracted by the hood passes through a dedicated trunk and Fire Dampers 17-FD-128, 17-FD-145 and 17-FD-146 to two 100% duty/standby centrifugal exhaust fans fitted with backflow dampers and located on B Deck.


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Equipment Details – Galley Exhaust Fans Tag Number:

K-1713A/B

Location:

B Deck

Manufacturer:

Thermatrol

Model:

PF545-AF

Driver Rating:

4.0kW

Capacity:

3000 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The galley supply and exhaust fans are set up to operate in duty/standby mode and controlled from the HVAC control panel. Fan status indication and control for the galley supply and exhaust fans is provided on the DCS as follows: •

Supply Fan K-1712A Running 17-YZ-202A

•

Supply Fan K-1712B Running 17-YZ-202B

•

Exhaust Fan K-1713A Running 17-YZ-203A

•

Exhaust Fan K-1713B Running 17-YZ-204B

Gymnasium Used air is extracted from the gymnasium by one 100% duty exhaust fan. The used air passes through Fire Damper 17-FD-147 to the outside. Equipment Details – Gymnasium Exhaust Fan Tag Number:

K-1711

Location:

Gymnasium

Manufacturer:

Tantech

Model:

TD-1300/250-Hi

Driver Rating:

0.14kW

Capacity:

280 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The gymnasium exhaust fan is controlled from the HVAC control panel or DCS. Fan status indication and control for the gymnasium exhaust fan is provided on the DCS as follows: •

Exhaust Fan K-1711 Remote Start/Stop 17-HCH-016

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Smoking Room Used air is extracted from the smoking room by one 100% duty exhaust fan. The used air passes through a Fire Damper 17-FD-140 to the outside. Equipment Details – Smoking Room Exhaust Fan Tag Number:

K-1717

Location:

Smoking Room

Manufacturer:

Systemaire

Model:

TD-1300/250-Hi

Driver Rating:

0.14kW

Capacity:

230 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The smoking room exhaust fan is controlled from the HVAC control panel or DCS. Indication and control for the smoking room exhaust fan is provided on the DCS as follows:

3.4.5

•

Exhaust Fan K-1717 Remote Start/Stop 17-HCH-015

•


D Deck HVAC Conditioned fresh air from the A Deck AHUs A-1702A and B is supplied directly from the supply duct to D Deck via Fire Damper 17-FD-153. Used air from the D Deck is led away to the outside via Fire Damper 17-FD-152. Fresh air from the supply duct is supplied directly via sections of trunk to the following spaces: •

Airlock 502/503, passages 501 and 540, and locker 539 via a Constant Volume Diffuser A-1702-A-01V

•

Airlock 504, locker 532/534 and passageway 501 via a Constant Volume Diffuser A-1702-A-01U

•

Crew cabin 506 via Cooling Unit A-1702-A-02A

•

Crew cabin 507 via Cooling Unit A-1702-A-02B

•

Crew cabin 508 via Cooling Unit A-1702-A-02C

•

Crew cabin 509 via Cooling Unit A-1702-A-02D

•

Crew cabin 510 via Cooling Unit A-1702-A-02E

•

Crew cabin 511 via Cooling Unit A-1702-A-02F

•

Crew cabin 512 via Cooling Unit A-1702-A-02G

•

Crew cabin 513 via Cooling Unit A-1702-A-02H

•

Crew cabin 514 via Cooling Unit A-1702-A-02I

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Crew cabin 515 via Cooling Unit A-1702-A-02J

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Crew cabin 516 via Cooling Unit A-1702-A-02K


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Crew cabin 517 via Cooling Unit A-1702-A-02L

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Crew cabin 518 via Cooling Unit A-1702-A-02M

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Crew cabin 519 via Cooling Unit A-1702-A-02N

•

Crew cabin 520 via Cooling Unit A-1702-A-02O

•

Crew cabin 521 via Cooling Unit A-1702-A-02P

•

Crew cabin 522 via Cooling Unit A-1702-A-02Q

•

Crew cabin 523 via Cooling Unit A-1702-A-02R

•

Crew cabin 524 via Cooling Unit A-1702-A-02S

•

Crew cabin 525 via Cooling Unit A-1702-A-02T

•

Crew cabin 526 via Cooling Unit A-1702-A-02U

•

Crew cabin 527 via Cooling Unit A-1702-A-02V

•

Crew cabin 528 via Cooling Unit A-1702-A-02W

•

Crew cabin 529 via Cooling Unit A-1702-A-02X

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Crew cabin 530 via Cooling Unit A-1702-A-02Y

•

Crew cabin 531 via Cooling Unit A-1702-A-02Z

Used air from the cabins is extracted directly by trunk via Fire Damper 17-FD-152 to the sanitary exhaust fans located on E Deck top. Used air from airlock 502 is extracted via Pressure Control Damper A-1702-Z-09 and Fire Damper 17-FD-150, whilst used air from airlock 503 is extracted via Pressure Control Damper A-1702-Z-10 and Fire Damper 17-FD-151. Air recirculated from the cabins passes directly through return trunk and a Fire Damper 17-FD-154 to the return duct. A temperature transmitter is sited in the trunk upstream of the fire damper to measure the return air temperature. 3.4.6

E Deck and E Deck Top HVAC Conditioned fresh air from A Deck AHUs A-1702A and B is supplied directly from the supply duct to E Deck via Fire Damper 17-FD-160. Used air from E Deck is led away to the outside via Fire Damper 17-FD-158. Fresh air from the supply duct is supplied directly via sections of trunk to the following spaces: •

Battery room via Constant Air Volume Diffuser A-1702-A-01W

•

Telecom Equipment Room (TER) via VAV Diffuser 17-FCD-088/089 and Flow Controller 17-FC-088/089

•

Airlock 604, locker 627 and passages 601 and 602 via Constant Air Volume Diffuser A-1702-A-01Z

•

Heli brief room via VAV Diffuser 17-FCD-090 and Flow Controller 17-FC-090

•

Reception room via VAV Diffuser 17-FCD-091 and Flow Controller 17-FC-091

•

Hospital via Constant Air Volume Diffuser A-1702-A-01X and heater


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Passages 601 and 662, airlock 603 and CGL 626 via Constant Air Volume Diffuser A-1702-A-01Y

•

Medic cabin 624 via Cooling Unit A-1702A-02AJ

•

Crew cabin 605 via Cooling Unit A-1702-A-02AA

•

Crew cabin 606 via Cooling Unit A-1702-A-02AB

•

Crew cabin 607 via Cooling Unit A-1702-A-02AC

•

Crew cabin 609 via Cooling Unit A-1702-A-02AD

•

Crew cabin 610 via Cooling Unit A-1702-A-02AE

•

Crew cabin 611 via Cooling Unit A-1702-A-02AF

•

Crew cabin 612 via Cooling Unit A-1702-A-02AG

•

Crew cabin 613 via Cooling Unit A-1702-A-02AH

•

Crew cabin 614 via Cooling Unit A-1702-A-02AI

Used air from airlock 603 is extracted via Fire Damper FD-156 and Pressure Control Damper A-1702-Z-11. Used air from airlock 604 is extracted via Fire Damper FD-157 and Pressure Control Damper A-1702-Z-12. Used air from the heli brief room is extracted via Fire Damper FD-161 and Pressure Control Damper A-1702-Z-13. Used air from E Deck is extracted directly by trunk to the sanitary exhaust fans located on E Deck top. Air recirculated from the cabins passes directly through return trunk and Fire Damper 17-FD-155 to the return duct. A temperature transmitter is sited in the trunk upstream of the fire damper to measure the return air temperature. Hospital Room Used air is extracted from the hospital room by one of two 100% duty/standby Exhaust Fans K-1714A/B. The used air passes through the backflow dampers for the fan sets and on through trunk and Fire Damper 17-FD-162 to the outside atmosphere. Equipment Details – Hospital Room Exhaust Fans Tag Number:

K-1714A/B

Location:

Hospital Room

Manufacturer:

Systemaire

Model:

TD-2000/315-Hi

Driver Rating:

0.35kW

Capacity:

330 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner.


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The hospital room exhaust fans are set up to operate in duty/standby mode and controlled from a HVAC System control panel or DCS. Indication and control for the hospital room exhaust fans is provided on the DCS as follows: •

Duty Exhaust Fan K-1714A/B Remote Start/Stop 17-HCH-018

•

Exhaust Fan K-1714A Running 17-YZ-219

•

Exhaust Fan K-1714B Running 17-YZ-220

Sanitary Exhaust Used air is extracted from all decks by one of the two 100% duty/standby Sanitary Exhaust Fans K-1715A/B. The used air passes through the backflow dampers for the fan sets and on through trunk and a Fire Damper 17-FD-164 to the outside atmosphere. Equipment Details – Sanitary Exhaust Fans Tag Number:

K-1715A/B

Location:

Outside E Deck top

Manufacturer:

Thermatrol

Model:

PF500-AF

Driver Rating:

4.00kW

Capacity:

2500 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The sanitary exhaust fans are set up to operate in duty/standby mode and controlled from the HVAC System control panel or DCS. Indication and control for the sanitary exhaust fans is provided on the DCS as follows: •

Duty Exhaust Fan K-1715A/B Remote Start/Stop 17-HCH-019

•

Exhaust Fan K-1715A Running 17-YZ-205

•

Exhaust Fan K-1715B Running 17-YZ-206

Battery Room Used air is extracted from the battery room by one of two 100% duty/standby Exhaust Fans K-1710A/B. The used air passes through the backflow dampers for the fan sets and on through trunk and Fire Damper 17-FD-159 to the exhaust cowl. Equipment Details – Battery Room Exhaust Fans Tag Number:

K-1710A/B

Location:

Weather Deck

Manufacturer:

Paramount

Model:

BAF 480/4/4-8/30

Driver Rating:

3.7kW

Capacity:

260 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner.


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The battery room exhaust fans are set up to operate in duty/standby mode and controlled from the HVAC System control panel or DCS. Lift Motor Space in E Deck Top Exhaust Fan K-1716 extracts used air from the lift pulley space. The used air passes through Fire Damper FD-165 and on through trunk and Fire Damper 17-FD-164 to the outside atmosphere. Supply air is supplied via Constant Air Volume Diffuser A-1702-01AA. Supply spill air is from the stairway is supplied via Pressure Control Damper A-1702-Z-14 and Fire Damper 17-FD-163 located on E Deck. Equipment Details – Lift Pulley Space Exhaust Fan Tag Number:

K-1716

Location:

Lift Motor Space

Manufacturer:

Thermatrol

Model:

AF-400/4/12/10

Driver Rating:

0.37kW

Capacity:

350 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The lift motor space exhaust fan is controlled from the HVAC System control panel or DCS. Indication and control for the lift motor space exhaust fan is provided on the DCS as follows: •

Duty Exhaust Fan K-1716 Remote Start/Stop 17-HCH-019

•


Safety Locker in E Deck Top This area is unventilated.

3.5

CCR, CER, PABX and UPS HVAC System Air Handling Unit A-1703, located in the A Deck AHU room, is a 100% duty AHU which provides pre-conditioned fresh air to the control and equipment rooms. The fresh air inlet to A-1703 is the same as the air inlets for the accommodation HVAC System through the B Deck air inlet or the high inlet ducting from C Deck. Both inlets have louvred grilles designed for 100% capacity. Air from Air Handling Unit A-1703 is supplied directly via Fire Damper 17-FD-131 into the supply ducting to the CCR on B Deck and via Fire Damper 17-FD-113 into the supply ducting to the CER on A Deck. Air from the UPS room enters the battery room on the upper deck by way of a down comer, which is provided with a Fire Damper 17-FD-105 and non-return damper. Supply air enters A-1703 through flexible connections and pneumatic Shut-off Damper 17-SD-057.


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The CER, CCR, PABX, UPS and TER rooms each have standalone air-cooled package air conditioners to supply recirculated air as follows:

3.5.1

•

CER

A-1705

•

CCR

A-1706

•

PABX

A-1707

•

UPS

A-1708

•

TER

A-1709

CCR, CER, PABX and UPS HVAC System Air Handling Unit 3 Equipment Details Tag Number:

A-1703

Location:

A Deck Air Handling Room

Manufacturer:

DES

Power:

30kW

Capacity:

8220 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The systems are designed to provide a mixture of outside air from the fresh air intakes on B and C Deck and recirculated air to the accommodation control and equipment rooms. Volume Control Damper A-1703-Z-01 is installed in the recirculated air intakes from the accommodation controls the air mixture to the AHUs. The mixed air passes through panel filters prior to cooling. Centrifugal Supply Fan A-1703-K-01 pass the air over the chilled water cooling coils and discharge to the control and equipment areas through Volume Control Damper 17-FCD-053. Control of the Air Handling Unit A-1703 is from Local Control Panel A-1703-CP-01 or from the DCS. Selection of local or remote control is made from the local control panels. In local control mode, the AHUs can be started and stopped, duty selected and supply fans started and stopped from the local panel. This operation may also be carried out from the DCS when the AHU is selected to operate in remote mode. 3.5.2

A Deck and Upper Deck Air from Air Handling Unit A-1703 is supplied directly via Fire Damper 17-FD-113 into the supply ducting to the CER on A Deck, via Fire Damper 17-FD-124 to UPS Room 228 and via Fire Damper 17-FD-105 to the UPS battery room 101 on Upper Deck by way of down comer from A Deck. The supply trunk for the CER HVAC Systems is fitted with the following temperature and pressure transmitters: •

17-TT-012 CER Supply Air Temperature

•


•

17-TT-013 CER Return Air Temperature


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Fresh air from the CER HVAC supply trunk is also supplied directly to the following spaces: •

CER 205 via VAV Diffuser 17-FCD-059 and Flow Controller 17-FC-059

•


•


•

CER 205 via a VAV Diffuser 17-FCD-062 and Flow Controller 17-FC-062

Used air from the CER is led to the outside via Pressure Damper A-1702-Z-03 and Fire Damper 17-FD-117. The volume flow rate of return air enters Air Handling Unit A-1703 via Volume Control Damper A-1703-Z-01 and Fire Damper FD-114. The return air trunk is also fitted with a humidity eliminator to eliminate the humidity of the return air to the AHUs. UPS Battery Room Exhaust Used air is extracted from the battery room on Upper Deck by one of two 100% duty/standby Exhaust Fans K-1709A/B. The used air passes through the backflow dampers for the fan sets and on through trunk and a Fire Damper 17-FD-106 to the exhaust cowl. Equipment Details – UPS Battery Room Exhaust Fans Tag Number:

K-1709A/B

Location:

Weather Deck

Manufacturer:

Thermatrol

Model:

BAF480/4/6/10

Driver Rating:

0.37kW

Capacity:

370 litres/s

Refer to BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner. The battery room exhaust fans are set up to operate in duty/standby mode and controlled from the HVAC System control panel or DCS. Indication and control for the battery room exhaust fans is provided on the DCS as follows: •

Duty Exhaust Fan K-1709A/B Remote Start/Stop – 17-HCH-021

•

Exhaust Fan K-1709A Running – 17-YZ-211

•

Exhaust Fan K-1709B Running – 17-YZ-212

B Deck Spaces Air from Air Handling Unit A-1703 is supplied directly via Fire Damper 17-FD-131 into the supply ducting to the CCR on B Deck. The supply trunk for the CCR HVAC System is fitted with the following temperature and pressure transmitters: •

17-TT-012 CCR Supply Air Temperature

•


•

17-TT-014 CCR Return Air Temperature


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Conditioned fresh air is supplied directly through trunk from the supply duct to the B Deck spaces as follows: •

CCR 304 via VAV Diffuser 17-FCD-064 and Flow Controller 17-FC-064

•


•


•


•


•

PABX 307 via VAV Diffuser 17-FCD-069 and Flow Controller 17-FC-069

Used air from the CCR is extracted directly by trunk to the outside via Pressure Damper A-1702-Z-06 and Fire Damper 17-FD-133 on the CCR. Recirculated air from the PABX on B Deck spaces passes via Fire Dampers 17-FD-134 and 17-FD-132 to Pressure Damper A-1703-Z-01 on A Deck. 3.5.3

CER Package Air Conditioner Equipment Details Tag Number:

A-1705

Location:

CER

Manufacturer:

APAC

Model:

S60 CBX

Driver Rating:

4.72kW

Capacity:

3540 litres/s

Standalone air-cooled Package Air Conditioner A-1705 is installed in the CER to supply recirculated air. A-1705 has a hermetic compressor operating on R407C and a tube-type air-cooled condenser which is cooled by fresh air from Condenser Fans A-1716-K-01A/B. 3.5.4

CCR Package Air Conditioner Equipment Details Tag Number:

A-1706

Location:

CCR

Manufacturer:

APAC

Model:

S45 CBX

Driver Rating:

4.72kW

Capacity:

2400 litres/s

Standalone air-cooled Package Air Conditioner A-1706 is installed in the CCR to supply recirculated air. A-1706 has a hermetic compressor operating on R407C and a tube-type air-cooled condenser which is cooled by fresh air from Condenser Fans A-1717-K-01A/B.


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PABX Package Air Conditioner Equipment Details Tag Number:

A-1707

Location:

PABX

Manufacturer:

APAC

Model:

S9 CWV

Driver Rating:

0.62kW

Capacity:

470 litres/s

Standalone air-cooled Package Air Conditioner A-1707 is installed in the PABX to supply recirculated air. A-1707 has a hermetic compressor operating on R407C and a tube-type air-cooled condenser which is cooled by fresh air from Condenser Fans A-1718-K-01A/B. 3.5.6

UPS Package Air Conditioner Equipment Details Tag Number:

A-1708

Location:

UPS Room

Manufacturer:

APAC

Model:

S18 CWV

Driver Rating:

1.41kW

Capacity:

1100 litres/s

Standalone air-cooled Package Air Conditioner A-1708 is installed in the UPS room to supply recirculated air. A-1708 has a hermetic compressor operating on R407C and a tube-type air-cooled condenser which is cooled by fresh air from Condenser Fans A-1719-K-01A/B. 3.5.7

TER Package Air Conditioner Equipment Details Tag Number:

A-1709

Location:

TER

Manufacturer:

APAC

Model:

S25 CBX

Driver Rating:

1.87kW

Capacity:

1400 litres/s

Standalone air-cooled Package Air Conditioner A-1709 is installed in the CCR to supply recirculated air. A-1709 has a hermetic compressor operating on R407C and a tube-type air-cooled condenser which is cooled by fresh air from Condenser Fans A-1720-K-01A/B.


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3.6


3.6.1

Introduction An HVAC System is installed to provide ventilation and air conditioning to the aft accommodation areas. The aft accommodation HVAC Control Panel CP-1701 located in the CER controls and monitors the following: •

Air Handling Unit A-1702A/B

•

Air Handling Unit A-1704

•


•

Ventilation fans

•

Shut-off and fire dampers

•

Package air conditioners

The panel also controls the two chillers, and the associated compressor pumps and dampers which each have their own UCP. The AHUs operate in three areas. •

Two Air Handling Units A-1702A and B, which are configured for duty/standby, are supplied for the main accommodation and emergency switchboard rooms

•

A-1703 is supplied for the CER, CCR, PABX room, UPS room and battery room

•

A-1704 is supplied for the MSBR, engineering workshops, instrument/electric workshops, engineering store and electrical equipment store

The following package air conditioners are supplied to provide back-up in the event of AHU A-1704 or A-1703 failure: •

CER A-1705

•

CCR A-1706

•

PABX room A-1707

•

UPS room A-1708

•

TER A-1709

•

Main switchboard room A-1710

•

Engineering workshop A-1711

•

Engineering store A-1712

•

Fans and fire dampers in the machinery spaces are controlled directly from the SSDS

A separate package air conditioner is installed to control the hull forward spaces. The fans and fire dampers are controlled from the SSDS.


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Operation and Control Owing to the criticality and high importance attached to the main HVAC Systems, the systems have been fitted with various controls, alarms and indicators to ensure safe and efficient operation at all times. The DCS contains all the necessary operator interface controls and the required logic to control, monitor and provide annunciation for the equipment included in the main HVAC Systems, including the selection of the duty/standby AHUs, supply and exhaust fans and control of the fire dampers. The main HVAC System is totally shut down by the Bonga FPSO Fire and Gas System or ESS if necessary, in the event of an emergency. Once stopped, all main HVAC System equipment is prohibited from starting or opening until all inhibits have been removed from the Fire and Gas System or ESS.

3.6.3

Accommodation HVAC System Control The control of all HVAC Systems is carried out by a dual redundant PLC from the HVAC unit control panel located in the CER. On receipt of a start request from the DCS communications link, the PLC ensures that the chilled water system is started and operating, opens the necessary fire dampers and starts the relevant AHU. The link permits the operator to monitor and supervise the HVAC System, including accommodation temperature set points, from the DCS in the CCR. However, the HVAC PLC carries out all the control functions. The HVAC Unit Control Panel (UCP) also has a graphic display located on the front of the control panel which allows a view of the equipment status and performs duty selection and start/stop functions. The HVAC control panel controls and monitors the following items of equipment: •

Chiller and associated valves

•

Chilled water pumps and associated valves

•

Air handling units

•

Shut-off dampers

•

Ventilation and exhaust fans

•

Fire dampers with overriding control from the ESS

Each damper can be closed manually and electrically from the HVAC control panel in the CER or by the ESS. If the HVAC air supply fails due to a damper closing or a supply fan stopping, the control panel will stop the relevant exhaust fans. There is a serial data link between the DCS and the HVAC UCP in the CER which indicates and controls the status, alarms, airflow, temperatures and set points for the following: •

Aft HVAC System

•

Chilled water units

•

Air handling units


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Ventilation fans

•

AHU dampers

•

Fire dampers

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The fire dampers can also be closed and have indication via the ESS/SSDS hardwired system interface. 3.6.4

Aft Accommodation The aft accommodation HVAC Control Panel CP-1701 controls and monitors the following: •

Air Handling Units A-1702A/B

•


•


•

Ventilation fans

•

Shut-off and fire dampers

•

Package air conditioners

CP-1701 also controls the two chillers, which each have their own UCP. The HMI displays the status via the serial link from the HVAC UCP for the following: •

HVAC local control selected 17-HS-001A

•

HVAC remote control selected 17-HS-001B

•

HVAC system off not 17-HS-001A and 17-HS-001B

•

HVAC enabled 17-XI-001

All commands from the DCS to the HVAC UCP will take 1 second. When the HVAC System is not enabled via 17-XI-001 or remote is not selected via 17-HS-001B, commands will be inhibited from being sent to the HVAC UCP and command buttons on the HVAC displays and overlays shall be greyed out. The start command will only be available if the system is stopped, otherwise the command buttons on the overlays shall be greyed out. The stop command will only be available if the system is running, otherwise the command buttons on the overlays shall be greyed out. The duty select will only be available if a unit is not selected for duty, otherwise the command buttons on the overlays shall be greyed out. The following commands will be available from the CCR HMI: •

HVAC Start Sequence 17-HCH-002

•

HVAC Stop Sequence 17-HCL-002

On receipt of start signal 17-HCH-002, with the HVAC System enabled via 17-XI-001 and remote selected via 17-HS-001B, the HVAC UCP (CP-1701) starts the duty chilled water system, opens the required fire dampers and starts the air handling units.


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The HVAC UCP CP-1701 controls these operations and the change over of duty/standby units, whilst the DCS monitors the operations. When the HVAC System is enabled via 17-XI-001 and remote is selected via 17-HS-001B, the following temperature control set points can be set from the CCR HMI: •

AHU1 Temperature Control 17-THC-006

•


•


When the HVAC System is not enabled via 17-XI-001 or remote is not selected via 17-HS-001B, set points will be inhibited from being sent to the HVAC UCP and set pointbuttons on the overlays shall be greyed out. Chilled Water Pumps P-1703A and B are controlled from the local HVAC panel and operate as a duty/standby pair. Fans in the aft accommodation areas are controlled from the local HVAC panel and operate either as single units as follows: •

K-1706

•

K-1711

•

K-1716

•

K-1717

Or as duty/standby pairs as follows: •

K-1707A/B

•

K-1708A/B

•

K-1709A/B

•

K-1710A/B

•

K-1714A/B

•

K-1715A/B

All fans have an ESS interlock. Galley Fans K-1712A/B and K-1713A/B are controlled from the local HVAC panel and operate as duty/standby pairs. All aft accommodation fire dampers will be controlled from the HVAC UCP and the operator will have no control from the CCR HMI. The eight package air conditioners are controlled locally and have ESS interlocks. A fault alarm for each PAC is sent across the serial link.


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Chiller System A-1704A/B There are two chillers, each with an individual control panel, equipped with an onboard microprocessor which controls the chiller unit. The chiller control panels have hardwired interface signals with HVAC Control Panel CP-1701, which performs the supervisory control of the chillers. Chiller System A-1704A/B is a duty/standby system controlled from the aft accommodation HVAC Control Panel CP-1701. Starting and stopping will normally be from the UCP but may also be started and stopped in the CCR. The HMI will display the states read on the serial link from the HVAC UCP: •

Chiller System A Duty Selected – 17-HIS-004

•

Chiller System B Duty Selected – 17-HIS-006

•

Chiller System A Running/Stopped – 17-XI-004

•

Chiller System B Running/Stopped – 17-XI-006

•

Chiller System A Fault – 17-XAI-004

•

Chiller System B Fault – 17-XAI-006

When the HVAC System is enabled via 17-XI-001 and remote is selected via 17-HS-001B, the following commands will be available from the CCR HMI:

3.6.6

•

Chiller System A Duty Select – 17-HS-004

•

Chiller System B Duty Select – 17-HS-006

•

Chiller System Duty Start – 17-HCH-003

•

Chiller System Stop – 17-HCL-003

Air Handling Units AHU1A/B (A-1702A/B) AHU1A/B (A-1702A/B) is a duty/standby system controlled from aft accommodation HVAC Control Panel CP-1701. Starting and stopping will normally be by the UCP but may also be started and stopped by the operator in the CCR. The HMI will display the status via the serial link from the HVAC UCP as follows: •

AHU1 A Duty Selected – 17-HIS-051

•

AHU1 B Duty Selected – 17-HIS-054

•

AHU1 A Running/Stopped – 17-XI-051

•

AHU1 B Running/Stopped – 17-XI-054

•

AHU1 A Isolated – 17-HSA-051

•

AHU1 B Isolated – 17-HSA-054

•

AHU1 A Available – 17-YA-051

•

AHU1 B Available – 17-YA-054

•

AHU1 A Fail to Start – 17-XA-051

•

AHU1 B Fail to Start – 17-XA-054


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When the HVAC System is enabled via 17-XI-001 and remote is selected via 17-HS-001B, the following commands will be available from the CCR HMI: •

AHU1A Duty Select – 17-HS-051

•

AHU1B Duty Select – 17-HS-054

•

AHU1 Duty Start – 17-HCH-002

•

AHU1 Stop – 17-HCL-002

AHU2 (A-1703) and AHU3 (A-1704) AHU2 (A-1703) and AHU3 (A-1704) are single units controlled from aft accommodation HVAC Control Panel CP-1701. Starting and stopping will normally be by the UCP but may also be started and stopped by the operator in the CCR. The HMI will display the status via the serial link from the HVAC UCP as follows: •

AHU2 Running/Stopped – 17-XI-057

•

AHU2 Isolated – 17-HSA-057

•

AHU2 Available – 17-YA-057

•

AHU2 Fail to Start – 17-XA-057

•

AHU3 Running/Stopped – 17-XI-058

•

AHU3 Isolated – 17-HSA-058

•

AHU3 Available – 17-YA-058

•

AHU3 Fail to Start – 17-XA-058

When the HVAC System is enabled via 17-XI-001 and remote is selected via 17-HS-001B, the following commands will be available from the CCR HMI: •

AHU2 Start – 17-HCH-057

•


•

AHU3 Start – 17-HCH-058

•


The HVAC UCP also has a graphic display located on the front of the control panel, which allows the user to view the status of equipment as well as performing duty selection and start/stop functions.


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HVAC Blackout Recovery Sequence Initiation HVAC Blackstart (Essential) Command On actuating the Essential Generator Blackout Recovery Signal 74-YC-101 and the Emergency Generator Blackout Recovery Signal 74-YC-102, the DCS gives the ‘HVAC Blackstart (Essential) Command’ output 17-YC-201 via serial link to the HVAC System at essential blackout recovery sequence 0 +25 seconds. This DCS output signal remains latched and requires a manual reset from the DCS operator station. This reset would normally be carried out after the normal supplies from the LV switchboard to the essential and emergency switchboards have been restored. •

A-1703-LCP-01 HVAC AHU2 Control Panel (CCR/CER/PABX/UPS room)

•

A-1702B-LCP-01 HVAC AHU1-B Control Panel (accommodation)

•

A-1704-LCP-01 HVAC AHU3 Control Panel (MSBR/workshop)

•

K-1712A Galley Supply Fan A

•

K-1713A Galley Exhaust Fan A

•

K-1714A Hospital Exhaust Fan A

•

K-1708A Laundry Exhaust Fan A

•

K-1707A Laundry Supply Fan A

•

K-1715A Sanitary Space Exhaust Fan A

•

K-1709A Battery Room Exhaust Fan A

•

K-1710A TER Battery Room Exhaust Fan A

•

K-1716 Liftshaft Exhaust Fan

•

K-1717 Smoking Lounge Exhaust Fan

•

K-1711 Gymnasium Exhaust Fan

•

K-1706 Smoking Coffee Shop Exhaust Fan

•

P-1703B-PM-01 HVAC Chilled Water Circulating Pump B

•

A-1704B-KM-01A HVAC Chiller Unit-B A/C Comp 1

•

A-1704B-KM-01B HVAC Chiller Unit-B A/C Comp 2

•

A-1704B-KM-01C HVAC Chiller Unit-B A/C Comp 3

HVAC Blackstart (Emergency) Command On actuating only the emergency generator blackout recovery signal 74-YC-102, the DCS gives the ‘HVAC Blackstart (Emergency) Command’ output 17-YC-202 via serial link to the HVAC System at emergency blackout recovery sequence 0 +25 seconds. This DCS output signal remains latched and requires a manual reset from the DCS operator station. This reset would normally be carried out after the normal supply from the HV switchboard to the emergency switchboard has been restored. •

A-1703-LCP-01 HVAC AHU2 Control Panel (CCR/CER/PABX/UPS room)


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•

A-1702A-LCP-01 HVAC AHU1-A Control Panel (accommodation)

•

K-1712A Galley Supply Fan

•

K-1713A Galley Exhaust Fan

•

K-1714A Hospital Exhaust Fan

•

K-1708A Laundry Exhaust Fan

•

K-1707A Laundry Supply Fan

•

K-1715A Sanitary Space Exhaust Fan

•

K-1709A Battery Room Exhaust Fan

•

K-1710A TER Battery Room Exhaust Fan

•

K-1716 Liftshaft Supply Fan

•

K-1717 Smoking Lounge Exhaust Fan

•

K-1711 Gymnasium Exhaust Fan

•

K-1706 Coffee Shop/Dirty Lounge Exhaust Fan

•

P-1703A-PM-01 HVAC Chilled Water Circulating Pump

•

A-1704A-KM-01A HVAC Chiller Unit-A A/C Comp 1

•

A-1704A-KM-01B HVAC Chiller Unit-A A/C Comp 2

•

A-1704A-KM-01C HVAC Chiller Unit-A A/C Comp 3

ESS Interface The ESS will give a group shutdown of the fire dampers to HVAC control PLC based on fire and gas conditions. However, the individual fire damper closed feedback signals are hardwired to SSDS for monitoring. All air handling units, chilled water units and ventilation fans hardwired status feedback such as ‘Running, Local Isolation‘ are provided to the SSDS. All AHUs, chilled water units and the ventilation fans are provided with individual ESS shutdown interlocks. In the event of gas detection in the inlets to AHUs, the ESS will shut down all HVAC Systems. Package air conditioning units, where provided, will be started locally. Fire dampers are opened by control air pressure, via a solenoid valve, and are designed to fail-safe to the closed condition. The ESS system shuts all dampers, either individually or in groups, by de-energising the relevant solenoid valve which vents the pressure. Each fire damper or group of dampers can also be closed locally, by venting the air via a manual valve. The manual vent valve must be closed before the remote signal can re-open the damper. Fire and Gas Cause and Effect diagrams indicate the ESS shutdown causes the shutdown of the respective fire damper groups. In case of galley CO2 release demand input, the ESS will close the galley hood dampers.


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Safeguarding Fire and gas detectors installed at the ducted air intakes on A and C Decks continuously monitor the air for the main HVAC System. The normal arrangement is three smoke detectors and two IR gas detectors, operating on a 2oo3 and 2oo2 voting system respectively. Both sets of smoke and gas detectors interface with the DCS. If the main HVAC air supply fails due either to a damper closing or fan stopping, the HVAC System PLC logic stops the relevant exhaust fans. In the event of confirmed smoke at the air intakes to the AHUs, the DCS activates full air recirculation to the CCR and CER, but stops all air circulation to the remaining areas of the FPSO. Confirmed 60% LEL gas at the air intakes results in the automatic closure of the fire dampers and stoppage of the HVAC fans. These actions are essential to minimise the ingress of smoke or potentially explosive/toxic gas mixtures into the accommodation, stores and control room areas. The fire dampers can also be closed manually. The local fire damper panel located at each deck level in the accommodation includes a manual valve which closes all dampers on that deck level.


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Figure 2.1 – HVAC Single Line Diagram Upper Deck Forward


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Figure 2.2 – HVAC Single Line Diagram 2nd Deck Aft


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Figure 2.3 – HVAC Single Line Diagram Upper Deck Aft


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Figure 2.4 – HVAC Single Line Diagram A Deck Aft


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Figure 2.5 – HVAC Single Line Diagram B Deck Aft


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Figure 2.6 – HVAC Single Line Diagram C Deck Aft


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Figure 2.7 – HVAC Single Line Diagram D Deck Aft


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Figure 2.8 – HVAC Single Line Diagram E Deck Aft


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Figure 2.9 – HVAC Single Line Diagram E Deck Top Aft


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Figure 2.10 – HVAC Single Line Diagram 3rd Deck Aft


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Part 1 Technical Description. Section 3 System Description – Topsides HVAC. Table of Contents

1.0

INTRODUCTION............................................................................................................. 4 1.1

2.0

3.0

General................................................................................................................ 4

EQUIPMENT DETAILS .................................................................................................. 4 2.1

Power Module Main Switchroom Air Handling Units A-1770A/B......................... 4

2.2

Power Module Battery Room Air Handling Units A-1775A/B ............................ 16

2.3

Generator Turbine Enclosures .......................................................................... 25

2.4

Starboard Subsea Switchroom Air Handling Units A-1771A/B.......................... 33

2.5

Starboard Subsea Module Battery Room Air Handling Units A-1776A/B.......... 44

2.6

Compressor Control Module Air Handling Units A-1772A/B ............................. 53

2.7

Compressor Control Module Battery Room AHUs A-1777A/B.......................... 64

2.8

Chemical and Methanol Cofferdam HVAC ........................................................ 73

2.9

Port Process Module Water Lab Air Handling Units A-1774A/B ....................... 81

CONTROL AND INSTRUMENTATION........................................................................ 90 3.1

Air Conditioning System Operation ................................................................... 90

3.2

HVAC Controls .................................................................................................. 92

3.3

Power Module Main Switchroom HVAC Control ............................................... 93

3.4

Power Module Battery Room HVAC Control ..................................................... 98

3.5

Turbine Generators HVAC Control.................................................................. 103

3.6

Starboard Subsea Module Auxiliary Switchroom HVAC Control..................... 106

3.7

Starboard Subsea Module Battery Room HVAC Control ................................ 111

3.8

Compressor Control Module HVAC Control .................................................... 115

3.9

Compressor Control Module Battery Room HVAC Control ............................. 120

3.10

Chemical and Methanol Cofferdam HVAC Control ......................................... 124

3.11

Port Process Module Water Lab HVAC Control .............................................. 126

Part 1 Section 3 System Description – Topsides HVAC

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Table of Contents (cont’d) TABLES Table 3.1 – Power Module Main Switchroom HVAC Equipment.............................................. 4 Table 3.2 – A-1770A/B Equipment Tag Numbers .................................................................. 11 Table 3.3 – A-1770A/B Refrigeration System Tag Numbers.................................................. 14 Table 3.4 – Power Module Battery Room HVAC Equipment ................................................. 16 Table 3.5 – A-1775A/B Equipment Tag Numbers .................................................................. 20 Table 3.6 – Tag Numbers for Power Module Battery Room Refrigeration System ................ 23 Table 3.7 – Power Turbine Generator Room A/B/C/D Extract Ventilation Tag Numbers ...... 31 Table 3.8 – Starboard Subsea Auxiliary Switchroom HVAC Equipment................................ 33 Table 3.9 – A-1771A/B Tag Numbers .................................................................................... 39 Table 3.10 – Tag Numbers for Starboard Subsea Auxiliary Switchroom Refrigeration System ......................................................................................... 42 Table 3.11 – Starboard Subsea Module Battery Room HVAC Equipment ............................ 44 Table 3.12 – Starboard Subsea Battery Room AHUs A-1776A/B Tag Numbers................... 48 Table 3.13 – Starboard Subsea Module Battery Room Refrigeration System Tag Numbers 51 Table 3.14 – Compressor Control Module HVAC Equipment ................................................ 53 Table 3.15 – Compressor Control Module AHUs A-1772A/B Tag Numbers.......................... 59 Table 3.16 – Compressor Control Module Main Switchroom Refrigeration System for AHUs A-1772A/B Tag Numbers................................................................... 62 Table 3.17 – Compressor Control Module Battery Room HVAC Equipment ......................... 64 Table 3.18 – Compressor Control Module Battery Room AHUs A-1777A/B Tag Numbers..................................................................................................... 68 Table 3.19 – Compressor Control Module Battery Room Refrigeration System Tag Numbers........................................................................................ 71 Table 3.20 – Port Process Module Water Lab HVAC Equipment .......................................... 81 Table 3.21 – Port Process Module Water Lab AHUs A-1774A/B Tag Numbers .................... 85 Table 3.22 – Tag Numbers for Port Process Module Water Lab Refrigeration System ......... 88 Table 3.23 – A-1770A/B Refrigeration Skid Tag Numbers..................................................... 96 Table 3.24 – Power Module Main Switchroom Alarms and Trips........................................... 96 Table 3.25 – A-1775A/B Refrigeration Skid Tag Numbers................................................... 101 Table 3.26 – Power Module Battery Room Alarms and Trips .............................................. 101 Table 3.27 – Turbine Room Tag Numbers........................................................................... 104 Table 3.28 – Turbine Room Tag Numbers (Instrumentation)............................................... 105 Table 3.29 – Turbine Generator Rooms Alarms and Trips .................................................. 105 Table 3.30 – A-1771A/B Refrigeration Skid Tag Numbers................................................... 110 Table 3.31 – Starboard Subsea Module Auxiliary Switchroom Alarms and Trips ................ 110


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Table of Contents (cont’d) TABLES Table 3.32 – A-1776A/B Refrigeration Skid Tag Numbers................................................... 114 Table 3.33 – Starboard Subsea Module Battery Room Alarms and Trips ........................... 114 Table 3.34 – A-1772A/B Refrigeration Skid Tag Numbers................................................... 118 Table 3.35 – Compressor Control Module Alarms and Trips ............................................... 119 Table 3.36 – A-1777A/B Refrigeration Skid Tag Numbers................................................... 123 Table 3.37 – Compressor Control Module Battery Room Alarms and Trips ........................ 123 Table 3.38 – Cofferdam Alarms and Trips ........................................................................... 125 Table 3.39 – A-1774A/B Refrigeration Skid Tag Numbers................................................... 129 Table 3.40 – Port Process Module Water Lab Alarms and Trips ......................................... 129

FIGURES Figure 3.1 – Power Module Main Switchroom AHU-1770A ................................................... 12 Figure 3.2 – Power Module Main Switchroom Refrigeration System ..................................... 15 Figure 3.3 – Power Module Battery Room Air Handling Unit A-1775A .................................. 21 Figure 3.4 – Power Module Battery Room Refrigeration System........................................... 24 Figure 3.5 – Power Turbine Generator Room A Extract Ventilation....................................... 32 Figure 3.6 – Starboard Subsea Module Auxiliary Switchroom AHU A-1771A ....................... 40 Figure 3.7 – Starboard Subsea Auxiliary Switchroom Refrigeration System ......................... 43 Figure 3.8 – Starboard Subsea Battery Room Air Handling Unit A-1776A ............................ 49 Figure 3.9 – Starboard Subsea Module Battery Room Refrigeration System ........................ 52 Figure 3.10 – Compressor Control Module Main Switchroom AHU-1772A ........................... 60 Figure 3.11 – Compressor Control Module Main Switchroom Refrigeration System ............. 63 Figure 3.12 – Compressor Control Module Battery Room Air Handling Unit A-1777A .......... 69 Figure 3.13 – Compressor Control Module Battery Room Refrigeration System................... 72 Figure 3.14 – Chemical Area Cofferdam Extract System....................................................... 76 Figure 3.15 – Methanol Area Cofferdam Extract System....................................................... 80 Figure 3.16 – Port Process Module Water Lab Air Handling Unit A-1774A ........................... 86 Figure 3.17 – Port Process Module Water Lab Refrigeration System.................................... 89


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INTRODUCTION.

1.1

General

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The Topsides HVAC System provides ventilation and air conditioning in the following areas: •

Power Module Main Switchroom Air Handling Units A-1770A/B

•

Power Module Battery Air Handling Units A-1775A/B

•

Turbine Generator Ventilation Fans −

G-7040A

K-1776A/B

−

G-7040B

K-1777A/B

−

G-7040B

K-1778A/B

−

G-7040B

K-1779A/B

•

Starboard Subsea Auxiliary Switchroom Air Handling Units A-1771A/B

•

Starboard Subsea Battery Room Air Handling Units A-1776A/B

•

Compressor Control Module Air Handling Units A-1772A/B

•

Compressor Control Module Battery Room Air Handling Units A-1777A/B

•

Chemical and Methanol Cofferdam Extract Ventilation Fans K-1780A/B

•

Port Process Module Water Lab Air Handling Units A-1774A/B

2.0

EQUIPMENT DETAILS

2.1

Power Module Main Switchroom Air Handling Units A-1770A/B

2.1.1

General The major equipment on the power module main switchroom HVAC System is detailed in Table 3.1. Tag Number


A-1770A-K-01/A-1770B-K-01

Supply Fans

A-1770A-HAC-01/A-1770B-HAC-01

Air Cooled Condensers

A-1770A-HCF-01/A-1770B-HCF-01

Filter/Coalescer

A-1770A-HCC-01/A-1770B-HCC-01

HVAC Cooling Coils

HAS-1770

Sound Attenuators

HDV-1770A/B

Volume Control Dampers

HDV-1781

Volume Control Dampers

HDS-1770A/B

Air Inlet Shut-off Damper

Table 3.1 – Power Module Main Switchroom HVAC Equipment


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Tag Number


HDS-1771A/B

Re-circulate Air Shut-off Damper

HDS-1772A/B

Supply Air Shut-off Damper

HDS-1773

Relief Air Shut-off Damper

HRD-1770

Air Outlet Flow Regulating Damper

Table 3.1 – Power Module Main Switchroom HVAC Equipment (cont’d) 2.1.2

Power Module Main Switchroom Air Handling Units Equipment Details Tag Number:

A-1770A/B

Location:

Power Module Main Switchroom

Manufacturer:


System Type:

Supply Air

Airflow:

6.4m3/s

External Static Pressure: 600Pa Air Inlet Condition (Min): 15.5°Cdb/13.5°Cwb Air Inlet Condition (Max): 35°Cdb/29°Cwb Supply Air Condition:

22°Cdb/98% Sat

Refer to Figure 3.1 or P&ID BON-AME-3-PW-H-20117-001 Rev C02. The Air Handling Units (AHUs) are modularly constructed in folded steel pentapost sections fabricated in heavy gauge galvanised steel. Infill panels are constructed in hot dip zinc coated Plastisol coated steel and are double skinned and insulated with 50mm Class 0 rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections are mounted directly on top of the AHU. AHU instrumentation comprises the following: •

Liquid line solenoid valve

•

Liquid line sight glass

•

Refrigerant expansion valve

•

High Pressure/Low Pressure (HP/LP) switch

•

Suction gauge

•

Discharge gauge

•

Temperature controller

•

Differential pressure switches


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Equipment Details – Power Module Main Switchroom Ventilation Fans Tag Number:

A-1770A-K-01/A-1770B-K-01

Location:

Power Module Switchroom

Manufacturer:


Model:

RZR11-0630

Airflow:

6.4m3/s

Fan Static Pressure:

1100Pa

Fan Diameter:

630mm

Minimum Fan Inlet Temperature:

15°C

Maximum Fan Inlet Temperature:

40°C

Temperature Rise Across Fan:

1°C

Static Efficiency:

85%

Driver Manufacturer:

Invensys Brook Crompton

Power Rating:

11.0kW

Absorbed Power:

9.0kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm

Ventilation Fans A-1770A-K-01 and A-1770B-K-01 are of a centrifugal-flow, double-inlet, backward-curved non-overloading design. Electric motors A-1770A-KM-01 and 02 drive the fans through V-belt drive-wheels housed in sheet steel. Impellers and shafts are statically and dynamically balanced to Grade G 2.5 (DIN ISO 1940). The shafts are mounted on radial insert ball bearings, self-aligning double-row ball bearings or Plummer block mounted, double-row ball bearings, dependent on impeller size.


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Equipment Details – Power Module Main Switchroom Filter/Coalescers Tag Number:

A-1770A-HCF-01/A-1770B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

6.4m3/s

Filter Media Size:

595mm x 595mm x 650mm (6 off)

Minimum Temperature:

15°C

Outlet Salt Concentration: 0.05ppm with inlet of 3.6ppm Face Velocity:

2.96m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

Filter/coalescers A-1770A-HCF-01/A-1770B-HCF-01 are two-stage units located on the fresh air inlet of the AHU, immediately behind a weather cowl complete with a 20mm square bird mesh. The first stage consists of a high efficiency vertical vane double-pass separator, whilst the second stage consists of medium efficiency bag filters. The first stage contains 1.5mm stainless steel blades and the method of operation is double-deflection inertial water separation. Drains from the separators pass to the open drain system through a seal loop. The second stage contains 595mm x 595mm x 650mm filters, mounted in a stainless steel frame within the return/fresh air chamber of the AHU. Filtration media is rot proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. The combined unit is constructed in stainless steel and equipped with a drainage seal loop to the open drains. The combined filter/coalescer provides salt elimination of 99% at 6 microns (0.05ppm). Equipment Details – Power Module Sound Attenuators Tag Number:

HAS-1770

Location:


No of Units:

1

System:

Supply Air

Type:

RAS 150/35

Exposure:

Inside

Airflow:

6.4m3/s

Face Velocity:

3.2m/s

Airway Velocity:

9m/s

Pressure Loss:

50Pa (max)


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Temperature:

10/40°C

Size:

2000mm x 1000mm x 750mm

Attenuator design provides minimum resistance to the airflow and produces the minimum differential pressure across the attenuator. External casing construction is in 1.5mm galvanised sheet steel, with acoustic material held in place by a 1mm perforated galvanised steel sheet. The acoustic material is 40/45kg/m3 mineral wool held in place by 3mm weld pins and washers. A close-weave Melinex glass cloth is fitted between the mineral wool and the perforated sheet, which prevents mineral wool fibres passing into the air stream. Mineral wool and Melinex glass cloth are both fire retardant to BS 476 Part 4 and 7. The mineral wool is non-combustible, non-hygroscopic, odour free, and rot, damp and vermin proof, and able to withstand sagging, erosion and disintegration. Equipment Details – Power Module Volume Control Damper Tag Number:

HDV-1770A/B

Location:


No of Units:

2

System:

Supply Air

Airflow:

1.08m3/s

Velocity:

7.2m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

950mm x 350mm x 200mm

Tag Number:

HDV-1781

Location:


No of Units:

1

System:

Supply Air

Airflow:

1.61m3/s

Velocity:

6.7m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

900mm x 500mm x 200mm

The volume control damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316S11 stainless steel, with opposing action, are installed. Volume control dampers are hand operated by a quadrant with a secure step-less locking mechanism, incorporating a visible adjustment indication.


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Equipment Details – Power Module Shut-off Damper Tag Number:

HDS-1770A/B

Location:


No of Units:

2

System:

Air Inlet

Airflow:

1.28m3/s

Velocity:

6.1m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 350mm x 300mm

Tag Number:

HDS-1771A/B

Location:


No of Units:

2

System:

Recirculation Air

Airflow:

5.12m3/s

Velocity:

7.9m/s

Resistance/Open:

10Pa (max)

Size:

1350mm x 750mm x 300mm

Tag Number:

HDS-1772A/B

Location:


No of Units:

1

System:

Supply Air

Airflow:

6.4m3/s

Velocity:

10.0m/s

Resistance/Open:

10Pa (max)

Size:

1150mm x 900mm x 300mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper.


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Equipment Details – Power Module Relief Damper Tag Number:

HDS-1773

Location:


No of Units:

1

System:

Relief Air

Airflow:

1.28m3/s

Velocity:

6.1m/s

Resistance/Open:

10Pa (max)

Size:

1150mm x 900mm x 300mm

Tag Number:

HRD-1770

Location:


No of Units:

1

System:

Relief Air

Airflow:

1.28m3/s

Velocity:

6.1m/s

Resistance/Open:

10Pa (max)

Size:

700mm x 450mm x 200mm

The relief damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Refer to Figure 3.1 which details power module main switchroom AHU A-1770A. The relevant tag numbers for AHUs A-1770A/B are detailed Table 3.2.


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Description

A-1770A

A-1770B

Fresh Air Inlet Dampers

HDS-1770A

HDS-1770B

Return Air Inlet Dampers

HDS-1771A

HDS-1771B

Air Outlet Dampers

HDS-1772A

HDS-1772B

Common Outlet Air Damper

HDS-1773

Filter Coalescers

A-1770A-HCF-01

A-1770B-HCF-01

A-1770A-K-01

A-1770B-K-01

A-1770A-FM-01

A-1770B-FM-01

A-1770A-FM-02

A-1770B-FM-02

A-1770A-FM-03

A-1770B-FM-03

A-1770A-FM-04

A-1770B-FM-04

Filter Coalescer ∆P Indicators

17-PDI-702

17-PDI-706

Filter Coalescer ∆P Switches

17-PDSH702

17-PDSH706

AHU Fans

Condenser Fans

Switchroom Pressure Switch

17-PDSL-701

Fan ∆P Switches

17-PDSL-703

17-PDSL-707

Fan Inlet Temperature Switches

17-TSH-746

17-TSH-747

Air Outlet Temperature Switches

17-TS-704

17-TS-708

Table 3.2 – A-1770A/B Equipment Tag Numbers


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CP

CP

CP 17 PDSH 702

FILTER COALESCER P SWITCH 17-PDSH-702

17 PDI 702

FILTER COALESCER P INDICATOR 17-PDI-702

ESS

MCC CONDENSER FAN A-1770A KM-02

CP

M MOTOR STOP

MOTOR STOP

FRESH AIR INLET DAMPER HDS-1770A

FILTER COALESCER A-1770A-HCF-01

M A.D.

A.D.

FAN P SWITCH 17-PDSL-703 17 PDSL 703

A-1770A-K-01

FROM A-1770B

AIR INLET

CP

CP

17-XY-710

17 TSH 746

DRAIN

REURN AIR INLET DAMPER HDS-1771A

RETURN AIR

17-XY-711

FAN INTLET TEMPERATURE SWITCH 17-TSH-744

AIR OUTLET DAMPER HDS-1772A

CP

CP

17 PDI 701

MCC

SWITCHROOM PRESSURE SWITCH 17-PDSL-701

17 PDSL 701

AIR OUTLET TEMPERATURE SWITCH 17-TS-704

17 TS 704

CP

ESS

CP

CP

ESS HRD-1770

COMMON OUTLET AIR DAMPER HDS-1773

POWER MODULE MAIN SWITCHROOM (NOT TO SCALE)

HDS-1773

DERIVED FROM BON-AME-3PW-H-20117-001

AIR OUTLET

AC91003_VOL_032_002.ai

Figure 3.1 – Power Module Main Switchroom AHU-1770A


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2.1.3

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Power Module Main Switchroom Refrigeration System Equipment Details – Power Module Main Switchroom Air-cooled Condensers Tag Number:

A-1770A-HAC-01/A-1770B-HAC-01

Location:


Manufacturer:


No of Condensers:

2

Unit Duty (Sensible):

95kW

No of Fans:

4

Fan Speed:

1450rpm

Fan Airflow:

4.5m3/s each

Absorbed Power:

1.2kW

Driver Rating:

1.5kW

Air Inlet Temperature:

35°C

Air Outlet Temperature:

45°C

Compressor:

Frascold W-80-206

Compressor Type:

Semi-hermetic

Refrigerant:

Isceon 59

Absorbed Power:

57kW

Equipment Details – Power Module Main Switchroom Cooling Coils Tag Number:

A-1770A-HCC-01/A-1770B-HCC-01

Location:


Manufacturer:


Type:

DX-ST-2.5-1600-1600

No of Coils:

2

Airflow:

6.4m3/s

Air Inlet Coil:

35°C

Air Outlet Coil:

22°C

Sensible Load:

95kW

Refrigerant:

ISCEON 59

Pressure Drop:

50Pa (max)

Face Velocity:

2.5m/s

Refer to Figure 3.2 or NSV P&ID 6540-PW-PID-001. A Frascold W-80-206 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump.


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The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. The condenser fans are 700mm diameter four-bladed hub-types manufactured in lightweight glass fibre reinforced plastic. Each fan blade is non-sparking and is directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Power module main switchroom AHU A-1770A refrigeration system is detailed in Figure 3.2. Relevant tag numbers for AHU A-1770A/B refrigeration systems are detailed in Table 3.3. Description

A-1770A

A-1770B

Compressors

A-1770A-KM-02

A-1770B-KM-02

Condensers

A-1770A-HAC-01

A-1770B-HAC-01

A-1770A-FM-01

A-1770B-FM-01

A-1770A-FM-02

A-1770B-FM-02

A-1770A-FM-03

A-1770B-FM-03

A-1770A-FM-04

A-1770B-FM-04

Receiver Relief Valves

17-RV-880

17-RV-888

Solenoid Valves

17-XY-882

17-XY-890

Temperature Control Valves

17-TCV-880A

17-TCV-888A

Temperature Control Valves

17-TCV-880B

17-TCV-888B

A-1770A-HCC-01

A-1770B-HCC-01

Hot Gas Injection Valve Upstream Valves

17-XY-880

17-XY-888

Hot Gas Injection Valves

17-XV-881

17-XV-889

Condenser Fans

Cooling Coils

Table 3.3 – A-1770A/B Refrigeration System Tag Numbers


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DERIVED FROM 6540-PW-PID-001

DX COOLING COIL A-1770A-HCC-01

17 TCV 880B

TO LOCAL CONTROL PANEL LCP-1770

17 PG 855A

17 XY 882

17 PG 855B

SOLENOID VALVE

17 TCV 880A

17 PSL 880

17 PSH 881

SIGHT GLASS

17 PSH 882

17 PSL 883

Page 15 of 130 TO MCC

17 PSH 884

DRIER

REFRIGERANT COMPRESSOR A-1770A-KM-02

17 PSL 884

17 PG 885C

HOT GAS INJECTION VALVE

17 XV 881

RECEIVER

TO CONTROL PANEL LCP-1770

17 RV 880

17 XY 880

CHECK VALVE

CONDENSER COIL A-1770A-HAC-01

AC91003_VOL_032_008.ai

CONDENSER FAN A-1770A-FM-01




TO MCC

Shell Nigeria E&P Company Ltd. Unrestricted

Figure 3.2 – Power Module Main Switchroom Refrigeration System


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2.2

Power Module Battery Room Air Handling Units A-1775A/B

2.2.1

General The power module battery room is provided with the HVAC equipment shown in Table 3.4. Tag Number


A-1775A-K-01/A-1775B-K-01

Ventilation Fans

A-1775A-HAC-01/A-1775B-HAC-01

Air-cooled Condensers

A-1775A-HCF-01/A-1775B-HCF-01

Primary Air Filters

A-1775A-HCC-01/A-1775B-HCC-01

HVAC Cooling Coils

HDS-1790A/B


HDS-1774A/B


HDS-1775


HRD-1775

Air Outlet Flow Regulating Damper Table 3.4 – Power Module Battery Room HVAC Equipment

2.2.2

Power Module Battery Room Air Handling Units Equipment Details Tag Number:

A-1775A/B

Location:

Power Module Main Switchroom

Manufacturer:


System Type:

Battery Room Supply Air

Airflow:

0.65m3/s


16°Cdb/98% Sat

Refer to Figure 3.3 or P&ID BON-AME-3PW-H-20117-00X. The AHUs are modularly constructed and are comprised of folded steel ‘Pentapost’ sections fabricated in heavy-gauge galvanised steel. Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections of the unit are mounted directly on top of the AHU.


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AHU instrumentation comprises the following instrumentation: •


•


•


•

HP/LP switch

•

Suction gauge

•

Discharge gauge

•


•


Equipment Details – Power Module Battery Room Ventilation Fans Tag Number:

A-1775A-K-01/A-1775B-K-01

Location:

Power Module Battery Room

Manufacturer:


Model:

RZR11-0250

Airflow:

0.65m3/s


790Pa

Fan Diameter:

250mm


15°C


40°C


0.5°C

Static Efficiency:

73%



Power Rating:

1.5kW

Absorbed Power:

0.74kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm


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Equipment Details – Power Module Battery Room Filter/Coalescers Tag Number:

A-1775A-HCF-01/A-1775B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

0.65

Filter Media Size:

595mm x 289mm x 650mm (1 off)


15°C

Outlet Salt Concentration: 0.05pp with inlet of 3.6ppm Face Velocity:

3.61m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

A-1775A-HCF-01/A-1775B-HCF-01 are two-stage units located on the fresh air inlet of the AHU, immediately behind a weather cowl complete with a bird mesh 20mm square. The first stage is a high-efficiency vertical vane double-pass separator, whilst the second stage is medium-efficiency bag filters. Stage 1 contains 1.5mm stainless steel blades and the method of operation is double-deflection inertial water separation. Drains from the separators pass to the open drain system via a seal loop. Stage 2 contains 595mm x 289mm x 650mm filters, mounted in a stainless steel frame within the return/fresh air chamber of the AHU. Filtration media is rot proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. The combined unit is constructed in stainless steel and equipped with a drainage seal loop to the open drains. The combined filter/coalescer provides salt elimination of 99% at 6 microns, 0.05ppm with 3.6ppm input NTG std 30-knot aerosol. Figure 3.3 details power module battery AHU A-1775A. The relevant tag numbers for AHUs A-1775A/B are detailed in Table 3.5.


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Equipment Details – Power Module Battery Room Shut-off Damper Tag Number:

HDS-1790A/B

Location:


No of Units:

2

System:

Air Inlet

Airflow:

0.65m3/s

Velocity:

3.6m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 400mm x 300mm

Tag Number:

HDS-1774A/B

Location:


No of Units:

2

System:

Supply

Airflow:

0.65m3/s

Velocity:

5.2m/s

Resistance/Open:

10Pa (max)

Size:

670mm x 520mm x 300mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Power Module Battery Room Relief Damper Tag Number:

HDS-1775

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.65m3/s

Velocity:

4.6m/s

Resistance/Open:

10Pa (max)

Size:

750mm x 550mm x 300mm


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Tag Number:

HRD-1775

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.65m3/s

Velocity:

4.7m/s

Resistance/Open:

10Pa (max)

Size:

500mm x 450mm x 200mm

The relief damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Description

A-1775A

A-1775B


HDS-1790A

HDS-1790B

Air Outlet Dampers

HDS-1774A

HDS-1774B


HDS-1775

Filter Coalescers

A-1775A-HCF-01

A-1775B-HCF-01

A-1770A-K-01

A-1770B-K-01

A-1775A-FM-01

A-1775B-FM-01

A-1775A-FM-02

A-1775B-FM-02


17-PDI-811

17-PDI-815


17-PDSH-811

17-PDSH-815

AHU Fans Condenser Fans


17-PDSL-810

Fan ∆P Switches

17-PDSL-812

17-PDSL-816


17-TSH-823

17-TSH-824


17-TS-813

17-TS-817

Table 3.5 – A-1775A/B Equipment Tag Numbers


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CP

CP

CP 17 PDSH 811

FILTER COALESCER P INDICATOR 17-PDSH-811

17 PDI 811


ESS

CP

MCC CONDENSER FAN A-1775A-KM-02

M

MOTOR STOP

MOTOR STOP


M FILTER COALESCER A-1775A-HCF-01

A.D.

A.D.


AHU FAN A-1775A-K-01

CP

AIR INLET 17 TSH 823

DRAIN

17-XY-819



FROM A-1775B

CP

CP

17 PDI 810 BATTERY ROOM PRESSURE SWITCH 17-PDSL-810 17 PDSL 810

MCC

AIR OUTLET TEMPERATURE SWITCH 17-TS-813 17 TS 813

CP

ESS CP

CP

ESS HRD-1775

COMMON OUTLET AIR DAMPER HDS-1775 POWER MODULE BATTERY ROOM (NOT TO SCALE)


AIR OUTLET

AC91003_VOL_032_018.ai

Figure 3.3 – Power Module Battery Room Air Handling Unit A-1775A


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2.2.2

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Power Module Battery Room Refrigeration System Equipment Details – Power Module Battery Room Condensers Tag Number:

A-1775A-HAC-01/A-1775B-HAC-01

Location:


Manufacturer:



14.2kW

Fan Speed:

1450rpm

No of Fans:

2

Fan Airflow:

4.5m3/s each


35°C


45°C

Compressor:

Frascold V-20-59

Compressor Type:

Semi-hermetic

Refrigerant:

Isceon 59



Power Rating:

1.5kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm

Equipment Details – Power Module Battery Room Cooling Coils Tag Number:

A-1775A-HCC-01/A-1775B-HCC-01

Location:


Manufacturer:


Type:

DX-ST-2.5-600-600

No of Coils:

2

Airflow:

0.65m3/s

Air Inlet Coil:

35°Cdb

Air Outlet Coil:

16°Cdb

Sensible Load:

2.6kW

Refrigerant:

ISCEON 59

Pressure Drop:

82.5Pa (max)

Face Velocity:

1.80m/s

Refer to Figure 3.4 or NSV P&ID 6540-PW-PID-002.


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A Frascold V-20-59 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump. The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. Condenser fans are four-bladed hub-type manufactured in lightweight glass fibre reinforced plastic. Each fan blade is non-sparking and is directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.4 details power module battery room refrigeration system for Air Handling Unit A-1775A. The relevant tag numbers for Air Handling Units A-1775A/B refrigeration system are detailed in Table 3.6. Description

A-1775A

A-1775B

Condenser Fans

A-1775A-FM-01/02

A-1775B-FM-01/02

Condenser Coils

A-1775A-HAC-01

A-1775B-HAC-01


17-RV-941

17-RV-947

Solenoid Valves

17-XY-942

17-XY-949

17-TCV-940

7-TCV-947

A-1775A-HCC-01

A-1775B-HCC-01

A-1775A-K-02

A-1775B-K-02


17-XY-940

17-XY-947


17-XV-941

17-XV-948

Temperature Control Valves Cooling Coils Refrigerant Compressors

Table 3.6 – Tag Numbers for Power Module Battery Room Refrigeration System


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DERIVED FROM 6540-PW-PID-002



17 TCV 940

SOLENOID VALVE

17 PG 944A

17 XY 942

17 PG 944B

17 PSL 940

17 PSH 941

SIGHT GLASS

17 PSL 942

17 PSH 943


17 PSL 943

DRIER


17 PG 944C


17 RV 941


17 XV 941

RECEIVER

17 XY 940

CHECK VALVE


AC91003_VOL_032_009.ai



TO MCC


Figure 3.4 – Power Module Battery Room Refrigeration System


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2.3

Generator Turbine Enclosures

2.3.1

General Each generator turbine is equipped with two extract fans as follows:

2.3.2

•

Generator Turbine A K-1776A/B

•

Generator Turbine B K-1777A/B

•

Generator Turbine C K-1778A/B

•

Generator Turbine D K-1779A/B

Generator Turbine Extract Fans Equipment Details – Extract Fans Manufacturer:

Woodcock & Wilson, Huddersfield

Model:

SISW BFN

Location:

Relevant Turbine Roof

Airflow – 1 Fan:

39m3/s

Airflow – 2 Fans:

62m3/s

Static Pressure – 1 Fan: 1100Pa Static Pressure – 2 Fans: 1600Pa Minimum Inlet Temperature:

15°C

Maximum Inlet Temperature:

40°C



Power Rating:

110kW

Absorbed Power:

73kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm

The extract fan impellers are single inlet, single width, backward curved and dynamically balanced to the shaft. Fan casing construction is in heavy gauge carbon steel and a multiple V-belt pulley set, driven by an electrically powered motor, drives the impeller. The fan motors are air-cooled synchronous AC motors supplied by 400V, 3-phase 50Hz power.


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Equipment Details – Filter/Coalescers Tag No:

HCF-1775/1778

Manufacturer:


Type:

3 Stage (Louvre/Filter/Separator)

Location:

Power Module Turbine Generator Rooms A/D

Filter Media Size:

600mm x 600mm (20 off)

Airflow:

62m3/s

Minimum Inlet Temperature:

15°C

Maximum Salt Concentration:

0.05ppm with input of 3.6ppm

Face Velocity:

3.5m/s (max)

Filter ∆P – Clean:

50Pa

Filter ∆P – Dirty:

300Pa

Refer to Figure 3.5 or P&ID BON-AME-3PW-H-20117-002. Filter/Coalescers HCF-1775 and HCF-1778 are three-stage units comprising the following: •

Weather louvre

•

Primary stage coalescing panel filters

•

Second stage double-pass inertial vane separator

The unit is constructed in stainless steel and equipped with a drainage seal loop to the open drains. The weather louvre casing is constructed in 3mm stainless steel and the louvres are inclined at 45°. A 20mm stainless steel bird mesh is installed on the air inlet. The filter/coalescer first stage is a bank of medium-efficiency pleated panel filters, 600mm x 600mm, mounted in a stainless steel frame. The filtration media is rot proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Blades of 1.5mm stainless steel are installed in the inertial vane separator, and separation is by double-deflection inertial water separation. Drains from the separators pass to the open drain system through a seal loop. The combined filter/coalescer provides salt elimination of 99% at 6 microns (0.05ppm) with 3.6ppm input. Incorporated in the filter/coalescer housing are stainless steel slides, which are for the installation of high-efficiency filters. These are installed during the seasonal effects of the Harmattan Winds, which carry sand particles into the intakes. The filters are manufactured from a filter media free of glass fibres. The filter media and frame are constructed in polypropylene, which has progressive depth filtration, is water repellent, and with anti-microbial properties.


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Minimum filter efficiency of the filter/coalescer is F8, >95% at 6 micron when tested to ASHRAE Standard 52.2.P and the corresponding filter classes according to DIN EN 779 (EU8). At 1 micron, the filter has an average efficiency of 97%. Equipment Details – Turbine Generator Non-return Damper Tag Numbers:

HND-1773A/B

HND-1774A/B

HND-1775A/B

HND-1776A/B

Location:

Turbine Generator Rooms

No of Units:

2 each

System:

Extract Air

Airflow:

62.0m3/s

Velocity:

15.0m/s

Size:

1450mm x 2150mm x 300mm

Equipment Details – Turbine Generator Fire and Gas Damper Tag Numbers:

HGD-1776A/D

Location:

Turbine Generator Rooms

No of Units:

1 each

System:

Inlet Air

Airflow:

62.0m3/s

Velocity:

9.2m/s

Size:

5800mm x 1450mm x 300mm

Tag Numbers:

HGD-1777A/D

Location:

Turbine Generators

No of Units:

1 each

System:

Extract

Airflow:

62.0m3/s

Velocity:

10.2m/s

Size:

3900mm x 1950mm x 300mm

The fire and gas damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper.


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Equipment Details – Turbine Generator Attenuator Tag Number:

HAS-1775

Location:

Turbine Generator Room A

No of Units:

1

System:

Extract Outlet

Type:

RAS 150/15

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

8.8m/s

Airway Velocity:

15m/s

Pressure Loss:

65Pa (max)

Temperature:

10/40°C

Size:

3000mm x 2350mm x 1500mm

Tag Number:

HAS-1779

Location:

Turbine Generator Room A

No of Units:

1

System:

Extract Inlet

Type:

RAS 175/300

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

3.51m/s

Airway Velocity:

10m/s

Pressure Loss: Temperature:

70Pa (max) 10/40°C

Size:

3400mm x 5200mm x 4850m

Tag Number:

HAS-1776

Location:

Turbine Generator Room B

No of Units:

1

System:

Extract Outlet

Type:

RAS 150/15

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

8.8m/s

Airway Velocity:

15m/s


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Pressure Loss:

65Pa (max)

Temperature:

10/40°C

Size:

3000mm x 2350mm x 1500mm

Tag Number:

HAS-1780

Location:

Turbine Generator Room B

No of Units:

1

System:

Extract Inlet

Type:

RAS 175/300

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

3.51m/s

Airway Velocity:

10m/s

Pressure Loss:

70Pa (max)

Temperature:

10/40°C

Size:

3400mm x 5200mm x 4850mm

Tag Number:

HAS-1777

Location:

Turbine Generator Room C

No of Units:

1

System:

Extract Outlet

Type:

RAS 150/15

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

8.8m/s

Airway Velocity:

15m/s

Pressure Loss:

65Pa (max)

Temperature:

10/40°C

Size:

3000mm x 2350mm x 1500mm

Tag Number:

HAS-1781

Location:

Turbine Generator Room C

No of Units:

1

System:

Extract Inlet

Type:

RAS 175/300

Exposure:

Outside


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Airflow:

62m3/s

Face Velocity:

3.51m/s

Airway Velocity:

10m/s

Pressure Loss:

70Pa (max)

Temperature:

10/40°C

Size:

3400mm x 5200mm x 4850mm

Tag Number:

HAS-1778

Location:

Turbine Generator Room D

No of Units:

1

System:

Extract Outlet

Type:

RAS 150/15

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

8.8m/s

Airway Velocity:

15m/s

Pressure Loss:

65Pa (max)

Temperature:

10/40°C

Size:

3000mm x 2350mm x 1500mm

Tag Number:

HAS-1782

Location:

Turbine Generator Room D

No of Units:

1

System:

Extract Inlet

Type:

RAS 175/300

Exposure:

Outside

Airflow:

62m3/s

Face Velocity:

3.51m/s

Airway Velocity:

10m/s

Pressure Loss:

70Pa (max)

Temperature:

10/40°C

Size:

3400mm x 5200mm x 4850mm

The attenuator design provides minimum resistance to the airflow and produces the minimum differential pressure across the attenuator. External casing construction is of 1.5mm galvanised sheet steel, with acoustic material held in place by a 1mm perforated galvanised steel sheet.


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The acoustic material is 40/45kg/m3 mineral wool held in place by 3mm weld pins and washers. A close-weave Melinex glass cloth is fitted between the mineral wool and the perforated sheet, which prevents mineral wool fibres passing into the air stream. Mineral wool and Melinex glass cloth are both fire retardant to BS 476 Part 4 and 7. The mineral wool is non-combustible, non-hygroscopic, odour free, and rot, damp and vermin proof, and able to withstand sagging, erosion and disintegration. Figure 3.5 details Power Turbine Generator Room A extract ventilation. The relevant tag numbers for Power Turbine Generator Room A/B/C/D extract ventilation are detailed in Table 3.7. Description

Turbine A

Turbine B

Turbine C

Turbine D

Air Inlet Filter ∆P Indicator

17-PDI-722

17-PDI-725

17-PDI-728

17-PDI-731

Air Inlet Filter ∆P Switch

17-PDSH-722

17-PDSH-725

17-PDSH-728

17-PDSH-731

Air Inlet Damper

HGD-1776A

HGD-1776B

HGD-1776C

HGD-1776D

Air Outlet Damper

HGD-1777A

HGD-1777B

HGD-1777C

HGD-1777D

Air Outlet Temperature Indicator

17-TI-863

17-TI-864

17-TI-865

17-TI-866

Air Outlet Temperature Switch

17-TSH-863

17-TSH-864

17-TSH-865

17-TSH-866

Extract Fans

K-1776A/B

K-1777A/B

K-1778A/B

K-1779A/B

A

17-PDSL-720

17-PDSL-723

17-PDSL-726

17-PDSL-729

B

17-PDSL-721

17-PDSL-724

17-PDSL-727

17-PDSL-730

Extract Fan ∆P

Table 3.7 – Power Turbine Generator Room A/B/C/D Extract Ventilation Tag Numbers


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TURBINE GENERATOR ROOM A

EXHAUST

CP

CP

17 PDSL 721

17 PDSL 720

K-1776B

KM-1776B

MOTOR STOP

CP

K-1776A

M

KM-1776A

MOTOR STOP

MCC

MCC

CP

ESS

M

ESS

17 TT 883

17 TZAHH 853

17 TSH 883 HGD-1777A

8345 ZL JW5 419B

CP

ESS

8345 ZL JW5 419A

8345 ZL JW5 418B

8345 ZL JW5 418A

CP

ESS

HGD-1776A

17 PDSL 722

17 PDSL 722

CP

AIR INLET


AC91003_VOL_032_004.ai

Figure 3.5 – Power Turbine Generator Room A Extract Ventilation


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2.4

Starboard Subsea Switchroom Air Handling Units A-1771A/B

2.4.1

General The starboard subsea auxiliary switchroom is provided with the HVAC equipment listed in Table 3.8. Tag Number


A-1771A-K-01/A-1771B-K-01

Ventilation Fans

A-1771A-HAC-01/A-1771B-HAC-01


A-1771A-HCF-01/A-1771B-HCF-01

Primary Air Filters

A-1771A-HCC-01/A-1771B-HCC-01

HVAC Cooling Coils

HAS-1771

Sound Attenuator

HDV-1771A/B

Volume Control Damper

HDV-1772

Supply Air Volume Control Damper

HDS-1778A/B


HDS-1779A/B

Recirculated Air Shut-off Damper

HDS-1780A/B


HDS-1781


HRD-1771

Air Outlet Flow Regulation Damper

Table 3.8 – Starboard Subsea Auxiliary Switchroom HVAC Equipment 2.4.2

Starboard Subsea Auxiliary Switchroom Air Handling Units Equipment Details Tag Number:

A-1771A/B

Location:

Subsea Module Auxiliary Switchroom

Manufacturer:


System Type:

Supply Air

Airflow:

3.0m3/s


22°Cdb/98% Sat

Refer to Figure 3.6 or P&ID BON-AME-3SS-H-20117-007. The AHUs are modularly constructed, comprising folded steel ‘Pentapost’ sections fabricated in heavy gauge galvanised steel.


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Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections are mounted directly on top of the AHU. AHU instrumentation comprises refrigerant, temperature and electrical/manual controls. The following instrumentation is provided: •


•


•


•

HP/LP switch

•

Suction gauge

•

Discharge gauge

•


•


Equipment Details – Starboard Subsea Main Switchroom Ventilation Fans Tag Number:

A-1771A-K-01/A-1771B-K-01

Location:

Starboard Subsea Module

Manufacturer:


Model:

RZR11-0450

Airflow:

3.0m3/s


1180Pa

Fan Diameter:

450mm


15°C


40°C


1.0°C

Static Efficiency:

82%



Power Rating:

5.5kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm


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Equipment Details – Starboard Subsea Auxiliary Switchroom Filter/Coalescers Tag Number:

A-1771A-HCF-01/A-1771B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

0.65m3/s

Filter Media Size:

595mm x 595mm x 650mm (3 off)


15°C


2.78m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

A-1771A-HCF-01/A-1771B-HCF-01 are two-stage units located on the fresh air inlet of the AHU, immediately behind a weather cowl. The units are equipped with a bird mesh 20mm square contain medium-efficiency pleated bag filters. The first stage is a high-efficiency vertical vane double-pass separator, whilst the second stage is medium-efficiency bag filters. Stage 1 contains 1.5mm stainless steel blades and the method of operation is double-deflection inertial water separation. Drains from the separators pass to the open drain system via a seal loop. Stage 2 contains 595mm x 595mm x 650mm filters, mounted in a stainless steel frame within the return/fresh air chamber of the AHU. Filtration media is rot proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Unit construction is in stainless steel and is equipped with a drainage seal loop to the open drains. The combined filter/coalescer provides salt elimination of 99% at 6 microns, 0.05ppm with 3.6ppm input.


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Equipment Details – Starboard Subsea Auxiliary Switchroom Sound Attenuators Tag Number:

HAS-1771

Location:

Starboard Subsea Auxiliary Switchroom

No of Units:

1

System:

Supply Air

Type:

RAS 150/30

Exposure:

Inside

Airflow:

3.0m3/s

Face Velocity:

3.06m/s

Airway Velocity:

9m/s

Pressure Loss:

50Pa (max)

Temperature:

10/40°C

Size:

1400mm x 700mm x 750mm

The attenuator design provides minimum resistance to the airflow and produces the minimum differential pressure across the attenuator. External casing construction is of 1.5mm galvanised sheet steel, with acoustic material held in place by a 1mm perforated galvanised steel sheet. The acoustic material is 40/45kg/m3 mineral wool held in place by 3mm weld pins and washers. A close-weave Melinex glass cloth is fitted between the mineral wool and the perforated sheet, which prevents mineral wool fibres passing into the air stream. Mineral wool and Melinex glass cloth are both fire retardant to BS 476 Part 4 and 7. The mineral wool is non-combustible, non-hygroscopic, odour free, and rot, damp and vermin proof, and able to withstand sagging, erosion and disintegration. Equipment Details – Starboard Subsea Auxiliary Switchroom Volume Control Damper Tag Number:

HDV-1771A/B

Location:


No of Units:

2

System:

Supply Air

Airflow:

0.50m3/s

Velocity:

5.7m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

650mm x 350mm x 200mm


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Tag Number:

HDV-1772

Location:


No of Units:

1

System:

Supply Air

Airflow:

1.0m3/s

Velocity:

7.0m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

650mm x 350mm x 200mm

The volume control damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Volume control dampers are hand operated by a quadrant with a secure step-less locking mechanism, incorporating a visible adjustment indication. Equipment Details – Starboard Subsea Auxiliary Switchroom Shut-off Damper Tag Number:

HDS-1778A/B

Location:


No of Units:

2

System:

Air Inlet

Airflow:

0.6m3/s

Velocity:

3.3m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 400mm x 300mm

Tag Number:

HDS-1779A/B

Location:


No of Units:

1

System:

Recirculation Air

Airflow:

2.4m3/s

Velocity:

8.9m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 550mm x 300mm


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Tag Number:

HDS-1780A/B

Location:


No of Units:

1

System:

Supply Air

Airflow:

3.0m3/s

Velocity:

9.5m/s

Resistance/Open:

10Pa (max)

Size:

1050mm x 550mm x 300mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Starboard Subsea Auxiliary Switchroom Relief Damper Tag Number:

HDS-1781

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.6m3/s

Velocity:

1.9m/s

Resistance/Open:

10Pa (max)

Size:

850mm x 350mm x 300mm

Tag Number:

HRD-1771

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.6m3/s

Velocity:

4.8m/s

Resistance/Open:

10Pa (max)

Size:

600mm x 350mm x 200mm


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The relief damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment for the required airflow or room pressure is made by adding or removing counterweights. Starboard subsea module auxiliary switchroom AHU A-1771A is detailed in Figure 3.6. Relevant tag numbers for A-1771A/B are detailed in Table 3.9. Description

A-1771A

A-1771B


HDS-1778A

HDS-1778B


HDS-1779A

HDS-1779B

Air Outlet Dampers

HDS-1780A

HDS-1780B

Relief Damper

HRD-1771


HDS-1781

Filter Coalescers

A-1771A-HCF-01

A-1771B-HCF-01

A-1771A-K-01

A-1771B-K-01

A-1771A-FM-01

A-1771B-FM-01

A-1771A-FM-02

A-1771B-FM-02


17-PDI-751

17-PDI-755


17-PDSH-751

17-PDSH-755



17-PDSL-750

Fan ∆P Switches

17-PDSL-752

17-PDSL-756


17-TSH-765

17-TSH-766


17-TS-753

17-TS-757

Table 3.9 – A-1771A/B Tag Numbers


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CP

CP

COMMON AIR INLET

A-1770A-HAC-01 CP

CP

17 PDSH 751

ESS A-1771A

M KM-02 MOTOR STOP

17 PDI 751

MOTOR STOP

ESS FILTER COALESCER

A-1771A-KM-01

HDS-1778A

M

AIR INLET TO A-1771B A.D.

CP

A.D.

A-1771A K-01

17 PDSL 752

17 TSH 765 17-XY-759

17-XY-760

HDS-1780A

HDS-1779A

CP

CP

CP

MCC

RETURN AIR

17 TS 753 ESS

CP

CP

FROM A-1771B

CP

ESS STARBOARD SUB-SEA MODULE AUX SWITCHROOM (NOT TO SCALE)

HRD-1771

COMMON OUTLET AIR DAMPER HDS-1781 17 PDI 750

AIR OUTLET

SUBSEA MODULE AUXILIARY SWITCHROOM PRESSURE CP

DERIVED FROM BON-AME-3SS-H-20117-003

17 PDSL 750

AC91003_VOL_032_003.ai

Figure 3.6 – Starboard Subsea Module Auxiliary Switchroom AHU A-1771A


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Starboard Subsea Auxiliary Switchroom Refrigeration System Equipment Details – Starboard Subsea Auxiliary Switchroom Condensers Tag Number:

A-1771A-HAC-01-1771B-HAC-01

Location:


Manufacturer:



47kW

Fan Speed:

1450rpm

No of Fans:

2

Fan Airflow:

4.5m3/s each

Absorbed Power:

1.2kW

Driver Rating:

1.5kW


35°C


45°C

Compressor:

Frascold V 32 93

Compressor Type:

Semi-hermetic

Refrigerant:

Isceon 59



Power Rating:

1.5kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Equipment Details – Starboard Subsea Auxiliary Switchroom Cooling Coils Tag Number:

A-1771A-HCC-01-1771B-HCC-01

Location:

Starboard Subsea Module Auxiliary Switchroom

Manufacturer:


Type:

DX-ST-2.5-1400-1100

No of Coils:

2

Airflow:

3.0m3/s

Air Inlet Coil:

35°Cdb

Air Outlet Coil:

16°Cdb

Sensible Load:

47kW

Refrigerant:

Isceon 59

Pressure Drop:

40.0Pa (max)

Face Velocity:

1.95m/s

Refer to Figure 3.7 or NSV P&ID 6540-SS-PID-001.


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A Frascold V-32-93 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump. The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity of the air handling unit, inclusive of sensible and latent heat and is located on top of the air handling unit. Condenser fans are 700mm diameter four-bladed hub-type, manufactured in lightweight glass-fibre reinforced plastic. Each fan blade is non-sparking and directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.7 details starboard subsea module auxiliary switchroom refrigeration system for Air Handling Unit A-1771A. The relevant tag numbers for Air Handling Units A-1771A/B refrigeration system are detailed in Table 3.10. Description

A-1771A

A-1771B

Condenser Fans

A-1771A-FM-01/02

A-1771B-FM-01/02

Condenser Coils

A-1771A-HAC-01

A-1771B-HAC-01


17-RV-896

17-RV-903

Solenoid Valves

17-XY-898

17-XY-905

Hot Gas Injection Valve U/S Valves

17-XY-896

17-XY-903


17-XV-897

17-XY-904

17-TCV-896

17-TCV-903

A-1771A-HCC-01

A-1771B-HCC-01

A-1771A-K-02

A-1771B-K-02


Table 3.10 – Tag Numbers for Starboard Subsea Auxiliary Switchroom Refrigeration System


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DERIVED FROM 6540-SS-PID-001



17 TCV 896

SOLENOID VALVE

17 PG 900A

17 XY 898

17 PG 900B

17 PSL 896

17 PSH 897

SIGHT GLASS

17 PSL 898

17 PSH 899


17 PSL 899

DRIER


17 PG 900C


17 RV 896


17 XV 897

RECEIVER

17 XY 896

CHECK VALVE


AC91003_VOL_032_012.ai



TO MCC


Figure 3.7 – Starboard Subsea Auxiliary Switchroom Refrigeration System


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2.5

Starboard Subsea Module Battery Room Air Handling Units A-1776A/B

2.5.1

General The starboard subsea module battery room is provided with the HVAC equipment listed in Table 3.11. Tag Number


A-1776A-K-01/A-1776B-K-01

Ventilation Fans

A-1776A-HAC-01/A-1776B-HAC-01


A-1776A-HCF-01/A-1776B-HCF-01

Primary Air Filters

A-1776A-HCC-01/A-1776B-HCC-01

HVAC Cooling Coils

HDS-1791A/B

Air Inlet Shut-off Dampers

HDS-1783A/B

Supply Air Shut-off Dampers

HDS-1782


HRD-1776


Table 3.11 – Starboard Subsea Module Battery Room HVAC Equipment 2.5.2

Starboard Subsea Module Battery Room Air Handling Units Equipment Details Tag Number:

A-1776A/B

Location:

Subsea Auxiliary Battery Room

Manufacturer:


System Type:

Supply Air

Airflow:

0.43m3/s


16°Cdb/98% Sat

Refer to Figure 3.8 or P&ID BON-AME-3SS-H-20117-00X. The AHUs are modularly constructed, comprising folded steel ‘Pentapost’ sections fabricated in heavy gauge galvanised steel. Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel, and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections are mounted directly on top of the AHU.


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Instrumentation comprises refrigerant, temperature and electrical/manual controls. The following instrumentation is provided: •

Liquid line solenoid valve sight glass

•


•

HP/LP switch

•

Suction and discharge gauges

•


•


Equipment Details – Starboard Subsea Module Battery Room Ventilation Fans Tag Number:

A-1776A-K-01/A-1776B-K-01

Location:

Subsea Module Battery Room

Manufacturer:


Model:

RZR11-0200

Airflow:

0.43m3/s


820Pa

Fan Diameter:

200mm


15°C


40°C


0.5°C

Static Efficiency:

70%



Power Rating:

0.75kW

Supply Voltage

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm

Each fan provides 100% of the design requirement and is of the centrifugal flow, double-inlet and backward-curved non-overloading design. The fans are V-belt driven by air-cooled synchronous AC motors supplied by 400V 3-phase 50Hz power.


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Equipment Details – Starboard Subsea Module Battery Room Primary Air Filters Tag Number:

A-1776A-HCF-01/A-1776B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

0.43m/s

Filter Media Size:

595mm x 595mm x 650mm (1 off)


15°C


2.39m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

Primary air filters A-1776A-HCF-01 and A-1776B-HCF-01 contain a medium-efficiency pleated bag filter, 595mm x 595mm x 650mm. These are mounted in a stainless steel frame in the return/fresh air chamber of the AHU and are mounted in front of the evaporator coil. Filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Equipment Details – Starboard Subsea Module Battery Room Shut-off Damper Tag Number:

HDS-1791A/B

Location:

Starboard Subsea Module Battery Room

No of Units:

2

System:

Air Inlet

Airflow:

0.5m3/s

Velocity:

2.8m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 400mm x 300mm

Tag Number:

HDS-1783A/B

Location:


No of Units:

2

System:

Supply Air

Airflow:

0.43m3/s

Velocity:

6.6m/s

Resistance/Open:

10Pa (max)

Size:

650mm x 350mm x 300mm


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Tag Number:

HDS-1782

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.43m3/s

Velocity:

5.3m/s

Resistance/Open:

10Pa (max)

Size:

850mm x 400mm x 300mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Starboard Subsea Module Battery Room Relief Damper Tag Number:

HRD-1776

Location:

Starboard Subsea Battery Room

No of Units:

1

System:

Relief Air

Airflow:

HOLD

Velocity:

HOLD

Resistance/Open:

10Pa (max)

Size:

HOLD

The relief damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Figure 3.8 details starboard subsea battery room AHU A-1776A. The relevant tag numbers for AHUs A-1776A/B are detailed in Table 3.12.


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Description

A-1776A

A-1776B


HDS-1791A

HDS-1791B

Air Outlet Dampers

HDS-1783A

HDS-1783B


HDS-1782

Filter Coalescers

A-1776A-HCF-01

A-1776B-HCF-01

A-1776A-K-01

A-1776B-K-01

A-1776A-FM-01

A-1776B-FM-01


17-PDI-831

17-PDI-835


17-PDSH-831

17-PDSH-835



17-PDSL-830

Fan ∆P Switches

17-PDSL-832

17-PDSL-836


17-TSH-843

17-TSH-844


17-TS-833

17-TS-837

Table 3.12 – Starboard Subsea Battery Room AHUs A-1776A/B Tag Numbers


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CP

CP

COMMON AIR INLET

CP


ESS

M

CONDENSER FAN A-1776A-KM-02

MOTOR STOP


17 PDI 831

MOTOR STOP

CP

17 PDSH 831

ESS


M A.D.

CP

A.D.

FILTER COALESCER A-1776A-HCF-01


AIR INLET TO A-1776B

17 PDSL 832 FAN P SWITCH 17-PDSL-832

17 TSH 843

FAN INLET TEMPERATURE SWITCH 17-TSH-843

17-XY-839

CP AIR OUTLET DAMPER HDS-1783A

CP

MCC AIR OUTLET TEMPERATURE SWITCH 17-TS-833

17 TS 833 ESS

FROM A-1776B

CP

CP

CP

ESS

HRD-1776 STARBOARD SUB-SEA BATTERY RSDM (NOT TO SCALE) AIR OULET DAMPER HDS-1782

AIR OUTLET

17 PDI 830 BATTERY ROOM PRESSURE SWITCH 17-PDSL-830 17 CP PDSL 830


AC91003_VOL_032_021.ai

Figure 3.8 – Starboard Subsea Battery Room Air Handling Unit A-1776A


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Starboard Subsea Module Battery Room Refrigeration System Equipment Details – Starboard Subsea Module Battery Room Condensers Tag Number:

A-1776A-HAC-01/A-1776B-HAC-01

Location:


Manufacturer:



10.4kW

Fan Speed:

1450rpm

Fan Airflow:

4.7m3/s

Absorbed Power:

1.22kW


35°C


45°C

Compressor:

Frascold S-1039

Compressor Type:

Semi-hermetic

Refrigerant:

Isceon 59



Power Rating:

1.5kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Equipment Details – Starboard Subsea Module Battery Room Cooling Coils Tag Number:

A-1776A-HCC-01/A-1776B-HCC-01

Location:


Manufacturer:


Type:

DX-ST-2.5-600-600

No of Coils:

2

Airflow:

0.65m3/s

Air Inlet Coil:

35°Cdb

Air Outlet Coil:

16°Cdb

Sensible Load:

2.6kW

Refrigerant:

ISCEON 59

Pressure Drop:

82.5Pa (max)

Face Velocity:

1.80m/s

Refer to Figure 3.9 or NSV P&ID 6540-SS-PID-002.


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A Frascold S-1039 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump. The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. The condenser fans are four-bladed hub-type manufactured in lightweight glass-fibre reinforced plastic. Each fan blade is non-sparking and is directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.9 details the starboard subsea module battery room refrigeration system for Air Handling Unit A-1776A. The relevant tag numbers for Air Handling Units A-1776A/B refrigeration systems are detailed in Table 3.13. Description

A-1776A

A-1776B

Condenser Fans

A-1776A-FM-01/02

A-1776B-FM-01/02

Condenser Coils

A-1776A-HAC--01

A-1776B-HAC--01


17-RV-954

17-RV-960

Solenoid Valves

17-XY-956

17-XY-962

17-TCV-954

7-TCV-960

A-1776A-HCC-01

A-1776B-HCC-01

A-1776A-K-02

A-1776B-K-02


17-XY-954

17-XY-960


17-XV-955

17-XV-961


Table 3.13 – Starboard Subsea Module Battery Room Refrigeration System Tag Numbers


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DERIVED FROM 6540-SS-PID-002



17 TCV 954

SOLENOID VALVE

17 PG 957A

17 XY 956

17 PSH 954

17 PSL 955

17 PSH 956

SIGHT GLASS

17 PSL 956


17 PG 957B

DRIER



17 RV 954


17 XV 955

RECEIVER

17 XY 954

CHECK VALVE


AC91003_VOL_032_011.ai


TO MCC


Figure 3.9 – Starboard Subsea Module Battery Room Refrigeration System


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Unrestricted

2.6

Compressor Control Module Air Handling Units A-1772A/B

2.6.1

General The compressor control module is provided with the HVAC equipment listed in Table 3.14. Tag Numbers


A-1772A-K-01/A-1772B-K-01

Ventilation Fans

A-1772A-HAC-01/A-1772B-HAC-01


A-1772A-HCF-01/A-1772B-HCF-01

Primary Air Filters

A-1772A-HCC-01/A-1772B-HCC-01

HVAC Cooling Coils

HAS-1772/HAS-1783/HAS-1784

Sound Attenuators

HDV-1774


HDV-1775


HDS-1784A/B


HDS-1785A/B

Recirculated Air Shut-off Dampers

HDS-1786A/B


HDS-1787


HRD-1772


Table 3.14 – Compressor Control Module HVAC Equipment 2.6.2

Compressor Control Module Air Handling Units Equipment Details – AHU Tag Number:

A-1772A/B

Location:

Compressor Module Compressor Control Room

Manufacturer:


System Type:

Supply Air

Airflow:

3.0m3/s


16°Cdb/98% Sat

Refer to Figure 3.10 or P&ID BON-AME-3CC-H-20117-004. The AHUs are modularly constructed and comprise folded steel ‘Pentapost’ sections fabricated in heavy gauge galvanised steel.


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Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections are mounted directly on top of the AHU. AHU instrumentation comprises refrigerant, temperature and electrical/manual controls. The following instrumentation is provided: •


•


•


•

HP/LP switch

•

Suction gauge

•

Discharge gauge

•


•


Equipment Details – Compressor Control Module Ventilation Fans Tag Number:

A-1772A-K-01/A-1772B-K-01

Location:

Compressor Control Module

Manufacturer:


Model:

RZR11-0450

Airflow:

3.0m3/s


1000 Pa

Fan Diameter:

450mm


15°C


40°C


1.0°C

Static Efficiency:

82%



Power Rating:

5.5kW

Absorbed Power:

3.94kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm


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Each fan provides 100% of the design requirement and is of centrifugal flow, double-inlet, and backward-curved non-overloading design. The fans are V-belt driven by air-cooled synchronous AC motors supplied by 400V 3-phase 50Hz power. Equipment Details – Compressor Control Module Primary Air Filters Tag Number:

A-1772A-HCF-01/A-1772B-HCF-01

Location:

Compressor Control Room

Manufacturer:

Freudenburg

Type:

T60

Airflow:

3.0m3/s

Filter Media Size:

595mm x 595mm x 650mm (3 off)


15°C


2.78m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

Primary Air Filters A-1772-HCF-01 and A-1772-HCF-01 contain medium-efficiency pleated bag filters, 595mm x 595mm x 650mm. These are mounted in a stainless steel frame in the return/fresh air chamber of the AHU in front of the evaporator coil. Filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Equipment Details – Compressor Control Module Sound Attenuators Tag Number:

HAS-1772

Location:


No of Units:

1

System:

Supply Air

Type:

RAS 100/25

Exposure:

Inside

Airflow:

3.0m3/s

Face Velocity:

3.06m/s

Airway Velocity:

9m/s

Pressure Loss:

50Pa (max)

Temperature:

10/40°C

Size:

1400mm x 700mm x 1000mm


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Tag Number:

HAS-1783

Location:


No of Units:

1

System:

Recirculation Air

Type:

RAS 100/20

Exposure:

Inside

Aiflow:

2.4m3/s

Face Velocity:

3.08m/s

Airway Velocity:

8m/s

Pressure Loss:

45Pa (max)

Temperature:

10/40°C

Size:

1200mm x 650mm x 1000mm

Tag Number:

HAS-1784

Location:


No of Units:

1

System:

Relief Air

Type:

RAS 100/20

Exposure:

Inside

Airflow:

0.6m3/s

Face Velocity:

2.9m/s

Airway Velocity:

8m/s

Pressure Loss:

45Pa (max)

Temperature:

10/40°C

Size:

600mm x 350mm x 750mm

Attenuator design provides minimum resistance to the airflow and produces the minimum differential pressure across the attenuator. External casing construction is of 1.5mm galvanised sheet steel, with acoustic material held in place by a 1mm perforated galvanised steel sheet. The acoustic material is 40/45kg/m3 mineral wool held in place by 3mm weld pins and washers. A close-weave Melinex glass cloth is fitted between the mineral wool and the perforated sheet, which prevents mineral wool fibres passing into the air stream. Mineral wool and Melinex glass cloth are both fire retardant to BS 476 Part 4 and 7. The mineral wool is non-combustible, non-hygroscopic, odour free and rot, and damp and vermin proof and is able to withstand sagging, erosion and disintegration.


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Equipment Details – Compressor Control Module Volume Control Damper Tag Number:

HDV-1774

Location:


No of Units:

1

System:

Supply Air

Airflow:

1.14m3/s

Velocity:

6.57m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

850mm x 450mm x 200mm

Tag Number:

HDV-1775

Location:


No of Units:

1

System:

Supply Air

Airflow:

1.14m3/s

Velocity:

6.57m/s

Resistance/Open:

10Pa (max)

Pressure Loss:

50Pa (max)

Size:

850mm x 450mm x 200mm

The volume control damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316S11 stainless steel, with opposing action, are installed. Volume control dampers are hand operated by a quadrant with a secure step-less locking mechanism, incorporating a visible adjustment indication. Equipment Details – Compressor Control Module Shut-off Damper Tag Number:

HDS-1784A/B

Location:


No of Units:

2

System:

Air Inlet

Airflow:

0.6m3/s

Velocity:

3.4m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 400mm x 300mm


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Tag Number:

HDS-1785A/B

Location:


No of Units:

2

System:

Recirculation Air

Airflow:

2.4m3/s

Velocity:

7.6m/s

Resistance/Open:

10Pa (max)

Size:

1050mm x 550mm x 300mm

Tag Number:

HDS-1786A/B

Location:


No of Units:

1

System:

Supply Air

Airflow:

3.0m3/s

Velocity:

8.4m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 700mm x 300mm

The shut-off damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Compressor Control Module Relief Damper Tag Number:

HDS-1787

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.6m3/s

Velocity:

6.0m/s

Resistance/Open:

10Pa (max)

Size:

750mm x 350mm x 300mm


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Tag Number:

HRD-1772

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.6m3/s

Velocity:

6.0m/s

Resistance/Open:

10Pa (max)

Size:

500mm x 350mm x 200mm

The relief damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Figure 3.10 details compressor control module main switchroom AHU A-1772A. The relevant tag numbers for AHUs A-1772A/B are detailed in Table 3.15. Description

A-1772A

A-1772B


HDS-1784A

HDS-1784B


HDS-1785A

HDS-1785B

Air Outlet Dampers

HDS-1786A

HDS-1786B

Common Outlet Relief Damper

HRD-1772


HDS-1787

Filter Coalescers

A-1772A-HCF-01

A-1772B-HCF-01

A-1772A-K-01

A-1772B-K-01

A-1772A-FM-01

A-1772B-FM-01

A-1772A-FM-02

A-1772B-FM-02

A-1772A-FM-03

A-1772B-FM-03


17-PDI-771

17-PDI-775


17-PDSH-771

17-PDSH-775



17-PDSL-770

Fan ∆P Switches

17-PDSL-772

17-PDSL-776


17-TSH-785

17-TSH-785


17-TS-773

17-TS-777

Table 3.15 – Compressor Control Module AHUs A-1772A/B Tag Numbers


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CP

CP

CP 17 PDSH 771


17 PDI 771


ESS

CP


M

MOTOR STOP

MOTOR STOP



A.D.

A.D.



CP

AIR INLET 17-XY-779

CP

17 TSH 785

DRAIN

17-XY-780


REURN AIR INLET DAMPER HDS-1785A RETURN AIR

AIR OUTLET DAMPER HDS-1786A CP

17 PDI 770

MCC

CONTROL MODULE PRESSURE SWITCH 17-PDSL-770 17 PDSL 770

RETURN AIR TO A-1772B CP

FROM A-1772B


CP

ESS CP

CP

ESS HRD-1772

COMMON OUTLET AIR DAMPER HDS-1787 COMPRESSOR CONTROL MODULE (NOT TO SCALE)


AIR OUTLET

AC91003_VOL_032_020.ai

Figure 3.10 – Compressor Control Module Main Switchroom AHU-1772A


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Compressor Module Refrigeration System Equipment Details – Compressor Control Module Condensers Tag Number:

A-1772A-HAC-01/A-1772B-HAC-01

Location:


Manufacturer:


No of Condensers:

2


50kW

Fan Speed:

1450rpm

No of Fans:

3

Fan Airflow:

4.5m3/s each


35°C


45°C

Compressor:

Frascold Z-40-126

Compressor Type:

Semi-hermetic

Refrigerant:

Isceon 59



Power Rating:

1.5kW

Absorbed Power:

1.2kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Equipment Details – Compressor Control Module Cooling Coils Tag Number:

A-1772A-HCC-01/A-1772B-HCC-01

Location:

Compressor Control Module Control Room

Manufacturer:


Type:

DX-ST-2.5-1400-1100

No of Coils:

2

Airflow:

3.0m3/s

Air Inlet Coil:

35°C

Air Outlet Coil:

22°C

Sensible Load:

50kW

Refrigerant:

ISCEON 59

Pressure Drop:

63Pa (max)

Face Velocity:

1.95m/s

Refer to Figure 3.11 or NSV P&ID 6540-CC-PID-001.


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A Frascold Z-40-126 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump. The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. The condenser fans are 700mm diameter four-bladed hub-type manufactured in lightweight glass-fibre reinforced plastic. Each fan blade is non-sparking and directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.11 details compressor control module main switchroom refrigeration system for Air Handling Unit A-1772A. The relevant tag numbers for Air Handling Units A-1772A/B refrigeration system are detailed in Table 3.16. Description

A-1772A

A-1772B

Condenser Fans

A-1772A-FM-01/02/03

A-1772B-FM-01/02/03

Condenser Coils

A-1772A-HAC--01

A-1772B-HAC--01


17-RV-910

17-RV-918

Solenoid Valves

17-XY-912

17-XY-920

17-TCV-910

7-TCV-918

A-1772A-HCC-01

A-1772B-HCC-01

A-1772A-KM-02

A-1772B-KM-02


17-XY-910

17-XY-918


17-XV-911

17-XV-919


Table 3.16 – Compressor Control Module Main Switchroom Refrigeration System for AHUs A-1772A/B Tag Numbers


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DERIVED FROM 6540-CC-PID-001



17 TCV 910

SOLENOID VALVE

17 PG 915A

17 XY 912

17 PG 915B

17 PSL 910

17 PSH 911

SIGHT GLASS

17 PSH 912

17 PSL 913

DRIER

17 PSH 914


17 PSL 914


17 PG 915C


17 RV 910


17 XV 911

RECEIVER

17 XY 910

CHECK VALVE


AC91003_VOL_032_015.ai




TO MCC


Figure 3.11 – Compressor Control Module Main Switchroom Refrigeration System


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2.7

Compressor Control Module Battery Room AHUs A-1777A/B

2.7.1

General The compressor control module battery room is provided with the HVAC equipment listed in Table 3.17. Tag Number


A-1777A-K-01/A-1777B-K-01

Ventilation Fans

A-1777A-HAC-01/A-1777B-HAC-01


A-1777A-HCF-01/A-1777B-HCF-01

Primary Air Filters

A-1777A-HCC-01/A-1777B-HCC-01

HVAC Cooling Coils

HDS-1792A/B


HDS-1789A/B


HDS-1788


HRD-1777


Table 3.17 – Compressor Control Module Battery Room HVAC Equipment 2.7.2

Compressor Control Module Battery Room Air Handling Units Equipment Details Tag Number:

A-1777A/B

Location:

Compressor Control Module Battery Room

Manufacturer:


System Type:

Supply Air

Airflow:

0.56m3/s


16°Cdb/98% Sat

Refer to Figure 3.12 or P&ID BON-AME-3CC-H-20117-005. The AHUs are modularly constructed and comprise folded steel ‘Pentapost’ sections fabricated in heavy gauge galvanised steel. Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels. The air-cooled condenser sections are mounted directly on top of the AHU.


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AHU instrumentation comprises refrigerant, temperature and electrical/manual controls. The following instrumentation is provided: •


•


•


•

HP/LP switch

•

Suction gauge

•

Discharge gauge

•


•


Equipment Details – Compressor Control Module Battery Room Ventilation Fans Tag Number:

A-1777A-K-01-1777B-K-01

Location:


Manufacturer:


Model:

RZR11-0250

Airflow:

0.56m3/s


750Pa

Fan Diameter:

225mm


15°C


40°C


0.5°C

Static Efficiency:

78%



Power Rating:

0.75kW

Absorbed Power:

0.62kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1450rpm


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Equipment Details – Compressor Control Battery Room Primary Air Filters Tag Number:

A-1777A-HCF-01-1777B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

0.56m3/s

Filter Media Size:

595mm x 289mm x 650mm (1 off)


15°C

Outlet Salt Concentration:

0.05pp with inlet of 3.6ppm

Face Velocity:

3.11m/s

∆P Clean:

50Pa

∆P Dirty:

400Pa

Primary Air Filters A-1777A-HCF-01 and A-1777B-HCF-01 contain a medium-efficiency pleated bag filter, 595mm x 289mm x 650mm. These are mounted in a stainless steel frame in the return/fresh air chamber of the AHU and are mounted in front of the evaporator coil. Filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Equipment Details – Compressor Control Module Battery Room Shut-off Damper Tag Number:

HDS-1792A/B

Location:


No of Units:

2

System:

Air Inlet

Airflow:

0.56m3/s

Velocity:

2.8m/s

Resistance/Open:

10Pa (max)

Size:

950mm x 400mm x 300mm

Tag Number:

HDS-1789A/B

Location:


No of Units:

2

System:

Supply Air

Airflow:

0.56m3/s

Velocity:

5.6m/s

Resistance/Open:

10Pa (max)

Size:

670mm x 420mm x 300mm


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The shut-off damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Compressor Control Module Battery Room Relief Damper Tag Number:

HDS-1788

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.56m3/s

Velocity:

5.4m/s

Resistance/Open:

10Pa (max)

Size:

850mm x 400mm x 300mm

Tag Number:

HRD-1777

Location:


No of Units:

1

System:

Relief Air

Airflow:

0.56m3/s

Velocity:

5.4m/s

Resistance/Open:

10Pa (max)

Size:

600mm x 300mm x 200mm

The relief damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel are installed. Damper opening is controlled by counterbalance weights, which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Figure 3.12 details compressor control module battery room Air Handling Unit A-1777A. The relevant tag numbers for Air Handling Units A-1777A/B are detailed in Table 3.18.


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Description

A-1777A

A-1777B


HDS-1792A

HDS-1792B

Air Outlet Dampers

HDS-1789A

HDS-1789B


HDS-1777


HDS-1788

Filter Coalescers

A-1777A-HCF-01

A-1777B-HCF-01

A-1777A-K-01

A-1777B-K-01

A-1777A-FM-01

A-1777B-FM-01

A-1777A-FM-02

A-1777B-FM-02


17-PDI-791

17-PDI-795


17-PDSH-791

17-PDSH-795



17-PDSL-790

Fan ∆P Switches

17-PDSL-792

17-PDSL-796


17-TSH-803

17-TSH-804


17-TS-793

17-TS-797

Table 3.18 – Compressor Control Module Battery Room AHUs A-1777A/B Tag Numbers


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CP

CP

CP 17 PDSH 791

FILTER COALESER P SWITCH 17-PDSH-791

17 PDI 791

FILTER COALESER P INDICATOR 17-PDI-791

ESS

CP


M

MOTOR STOP

MOTOR STOP



A.D.

A.D.



CP

AIR INLET 17 TSH 803

DRAIN

17-XY-799



CP

CP

17 PDI 790 BATTERY ROOM PRESSURE SWITCH 17-PDSL-790 17 PDSL 790

MCC


CP

FROM A-1777B

ESS CP

CP

ESS HRD-1777

COMMON OUTLET AIR DAMPER HDS-1788 COMPRESSOR CONTROL MODULE BATTERY ROOM (NOT TO SCALE)


AIR OUTLET

AC91003_VOL_032_019.ai

Figure 3.12 – Compressor Control Module Battery Room Air Handling Unit A-1777A


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Compressor Control Module Battery Room Refrigeration System Equipment Details – Compressor Control Module Battery Room Condensers Tag Number:

A-1777A-HAC-01-1777B-HAC-01

Location:


Manufacturer:


No of Condensers:

2


7.7kW

No of Fans:

2

Fan Speed:

1450rpm

Fan Airflow:

4.5m3/s each

Absorbed Power:

1.2kW

Driver Rating:

1.5kW


35°C


45°C

Compressor:

Frascold V 20 59

Compressor Type:

Semi-hermetic

Refrigerant:

ISCEON 59



Power Rating:

1.5kW

Absorbed Power:

1.2kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Equipment Details – Compressor Control Module Battery Room Cooling Coils Tag Number:

A-1777A-HCC-01-1777B-HCC-01

Location:


Manufacturer:


Type:

DX-ST-2.1-600-600

No of Coils:

2

Airflow:

0.56m3/s

Air Inlet Coil:

35°C

Air Outlet Coil:

22°C

Sensible Load:

3kW

Refrigerant:

ISCEON 59


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Pressure Drop:

65Pa (max)

Face Velocity:

1.55m/s

Refer to Figure 3.13 or NSV P&ID 6540-CC-PID-002. A Frascold V 20 59 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump. The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. The condenser fans are 700mm diameter four-bladed hub-type, manufactured in lightweight glass-fibre reinforced plastic. Each fan blade is non-sparking and is directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel endplates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.13 details compressor control module battery room refrigeration system for Air Handling Unit A-1777A. The relevant tag numbers for Air Handling Units A-1777A/B refrigeration system are detailed in Table 3.19. Description

A-1777A

A-1777B

Condenser Fans

A-1777A-FM-01/02

A-1777B-FM-01/02

Condenser Coils

A-1777A-HAC--01

A-1777B-HAC--01


17-RV-966

17-RV-973

Solenoid Valves

17-XY-968

17-XY-975

17-TCV-966

17-TCV-973

A-1777A-HCC-01

A-1777B-HCC-01

A-1777A-KM-02

A-1777B-KM-02


17-XY-966

17-XY-973


17-XV-967

17-XV-974


Table 3.19 – Compressor Control Module Battery Room Refrigeration System Tag Numbers


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DERIVED FROM 6540-CC-PID-002



17 TCV 966

SOLENOID VALVE

17 PG 970A

17 XY 968

17 PG 970B

17 PSL 966

17 PSH 967

SIGHT GLASS

17 PSL 968

17 PSH 969


17 PSL 969

DRIER


17 PG 970C


17 RV 966


17 XV 967

RECEIVER

17 XY 966

CHECK VALVE


AC91003_VOL_032_014.ai



TO MCC


Figure 3.13 – Compressor Control Module Battery Room Refrigeration System


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2.8

Chemical and Methanol Cofferdam HVAC

2.8.1

Chemical Area Cofferdam Equipment Details – Extract Fan Tag Number:

K-1780A

Location:

Cofferdam Port Process Module

Manufacturer:


Model:

AXI-800 Variant

System Type:

Extract

Fan Type:

Mixed Flow

Airflow:

14.0m3/s


1800Pa

Fan Diameter:

800mm


15°C


40°C


1.75°C

Static Efficiency:

57%



Power Rating:

55kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Fan impeller K-17780A is single inlet, single width and backward curved dynamically balanced to the shaft. The impeller case is constructed of heavy gauge carbon steel. Impeller drive is by a multiple V-belt pulley set which is driven by an electrically powered motor. The fan motors are air-cooled synchronous AC motors supplied by 400V 3-phase 50Hz power.


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Equipment Details – Filter/Coalescer Tag No:

HCF-1786A

Manufacturer:


Type:

3-stage Louvre/Filter/Separator

Location:

Port Process Module

Filter Media Size:

600mm x 720mm x 300mm

Airflow:

14.0m3/s


15°C



Face Velocity:

3.5m/s (max)


50Pa


300Pa

Refer to Figure 3.14 or P&ID BON-AME-3GN-H-20117-009. Filter/Coalescer HCF-1786A is a three-stage unit comprising a weather louvre, primary/stage coalescing bag filters and a second stage double-pass inertial vane separator. The combined unit is constructed in stainless steel and is equipped with a drainage seal loop to the open drains. The weather louvre casing is constructed in 3mm stainless steel and the louvres are inclined at 45°. A 20mm stainless steel bird mesh is installed on the air inlet. The first stage of the filter/coalescer unit is a bank of medium-efficiency pleated bag filters 600mm x 720mm x 300mm, mounted in a stainless steel frame. Filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. The inertial vane separator contains 1.5mm stainless steel blades and the method of operation is double-deflection inertial water separation. Drains from the separators pass to the open drain system via a seal loop. The combined filter/coalescer provides salt elimination of 99% at 6 microns, 0.05ppm with 3.6ppm input NTG std 30-knot aerosol. Incorporated within the filter/coalescer housing are stainless steel slides, which are for high-efficiency filters. These will be installed during the seasonal effects of the Harmattan Winds, which carry sand particles into the intakes. The filters are manufactured from a filter media free of glass fibres. The filter media and frame are constructed in polypropylene, which has progressive depth filtration, water repellent and with anti-microbial properties. The minimum efficiency of the filter is F8, >95% at 6 micron when tested to ASHRAE Standard 52.2.P and the corresponding filter classes according to DIN EN 779 (EU8). At 1 micron, the filter has an average efficiency of 97%.


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Equipment Details – Chemical Cofferdam Shut-off Damper Tag Number:

HDS-1798A/B

Location:

Chemical Cofferdam

No of Units:

2

System:

Extract Air

Airflow:

14.0m3/s

Velocity:

10.3m/s

Resistance/Open:

20Pa (max)

Size:

1125mm x 1400mm x 300mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper.


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CP

17 PDSH 889

17 PDI 869

ESS

CP

8345 ZL JW5 419A

HDS-1798A

AIR INLET

ESS

CP

8345 ZL JW5 419B

MCC

MOTOR STOP ESS

KM-1780A

M

CP

8345 ZL JW5 419B 8345 ZL JW5 419A

HDS-1799A

K-1780A

EXHAUST

CHEMICAL TANK AREA NEGATIVE PRESSURE

DERIVED FROM BON-AME-3GN-H-20117-009

AC91003_VOL_032_005.ai

Figure 3.14 – Chemical Area Cofferdam Extract System


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2.8.2

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Methanol Tank Area Cofferdam Equipment Details – Extract Fan Tag Number:

K-1780B

Location:

Cofferdam Port Process Module

Manufacturer:


Model:

AXI-800 Variant

System Type:

Extract

Fan Type:

Mixed Flow

Airflow:

14.0m3/s


1800Pa

Fan Diameter:

800mm


15°C


40°C


1.75°C

Static Efficiency:

57%



Power Rating:

55kW

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Refer to Figure 3.15 or P&ID BON-AME-3GN-H-20117-009. Fan impeller K-17780B is single inlet, single width and backward curved, dynamically balanced to the shaft. The impeller case is constructed of heavy gauge carbon steel. Impeller drive is by a multiple V-belt pulley set driven by an electrically powered motor. The fan motors are air-cooled synchronous AC motors supplied by 400V 3-phase 50HZ power. Equipment Details – Filter/Coalescer Tag No:

HCF-1786B

Manufacturer:


Type:

2-stage Louvre Filter and Separator

Location:

Methanol Cofferdam

Filter Media Size:

600mm x 720mm x 300mm

Airflow:

14.0m3/s


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15°C



Face Velocity:

3.5m/s (max)


50Pa


300Pa

Filter/Coalescer HCF-1786B is a two-stage unit comprising a weather louvre, primary stage coalescing bag filters and a second stage double-pass inertial vane separator. The combined unit is constructed in stainless steel and is equipped with a drainage seal loop to the open drains. The weather louvre casing is constructed in 3mm stainless steel and the louvres are inclined at 45°. A 20mm stainless steel bird mesh is installed on the air inlet. The first stage of the filter/coalescer unit is a bank of medium-efficiency pleated bag filters 600mm x 720mm x 300mm, mounted in a stainless steel frame. The filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. The inertial vane separator contains 1.5mm stainless steel blades and the method of operation is double-deflection inertial water separation. Drains from the separators pass to the open drain system via a seal loop. The combined filter/coalescer provides salt elimination of 99% at 6 microns, 0.05ppm with 3.6ppm input NTG std 30-knot aerosol. Incorporated within the filter/coalescer housing are stainless steel slides, which are for high-efficiency filters. These will be installed during the seasonal effects of the Harmattin Winds, which carry sand particles into the intakes. The filters are manufactured from a filter media free of glass fibres. The filter media and frame are constructed in polypropylene, which has progressive depth filtration, water repellent and with anti-microbial properties. The minimum efficiency of the filter is F8, >95% at 6 micron when tested to ASHRAE Standard 52.2.P and the corresponding filter classes according to DIN EN 779 (EU8). At 1 micron, the filter has an average efficiency of 97%. Equipment Details – Methanol Cofferdam Shut-off Damper Tag Number:

HDS-1799A/B

Location:

Methanol Cofferdam

No of Units:

2

System:

Extract Air

Airflow:

14.0m3/s

Velocity:

10.3m/s

Resistance/Open:

20Pa (max)

Size:

1125mm x 1400mm x 300mm


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The shut-off damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel with opposing action are installed. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper.


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CP

17 PDSH 870 8345 ZL JW5 419B

CP

17 PDI 870

ESS

8345 ZL JW5 419A

HDS-1798B

MCC

8345 ZL JW5 419B

CP

MOTOR STOP ESS

AIR INLET

ESS

CP

KM-1780B

M

8345 ZL JW5 419A

HDS-1799B

K-1780B

EXHAUST

METHANOL TANK AREA NEGATIVE PRESSURE

DERIVED FROM BON-AME-3GN-H-20117-009

AC91003_VOL_032_006.ai

Figure 3.15 – Methanol Area Cofferdam Extract System


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2.9

Port Process Module Water Lab Air Handling Units A-1774A/B

2.9.1

General The port process module water lab is provided with the HVAC equipment listed in Table 3.20. Tag Number


A-1774A-K-01/A-1774B-K-01

Ventilation Fans

A-1774A-HAC-01/A-1774B-HAC-01


A-1774A-HCF-01/A-1774B-HCF-01

Primary Air Filters

A-1774A-HCC-01/A-1774B-HCC-01

HVAC Cooling Coils

HAS-1774

Sound Attenuator

HDS-1794A/B


HDS-1796A/B


HDS-1797


HDS-1774

Pressure Relief Air Damper

HRD-1774


Table 3.20 – Port Process Module Water Lab HVAC Equipment 2.9.2

Port Process Module Water Lab Air Handling Unit Tag Number:

A-1774A/B

Location:

Port Process Module Water Lab Roof

Manufacturer:


System Type:

Supply Air

Airflow:

0.3m3/s


16°Cdb/98% Sat

Refer to Figure 3.16 or P&ID BON-AME-3PP-H-20117-008. The air handling units are modularly constructed and comprise folded steel ‘Pentapost’ sections fabricated in heavy gauge galvanised steel. Infill panels are constructed in hot dip zinc coated ‘Plastisol’ coated steel and are double skinned and insulated with 50mm Class 0 Rated 80kg/m3 density mineral wool. Access doors are provided for all serviceable sections and are constructed in the same fashion as the infill panels.


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The air-cooled condenser sections are mounted directly on top of the AHU. AHU instrumentation comprises refrigerant, temperature and electrical/manual controls. The following instrumentation is provided: •


•


•


•

HP/LP switch

•

Suction gauge

•

Discharge gauge

•


•


Equipment Details – Port Process Module Water Lab Ventilation Fans Tag Number:

A-1774A-K-01-1774B-K-01

Location:

Port Process Module Water Lab

Manufacturer:


Model:

RZR11-0200

Airflow:

0.3m3/s


700 Pa

Fan Diameter:

200mm


15°C


40°C


1°C

Static Efficiency:

61%



Power Rating:

0.75kW

Absorbed Power:

0.35kW (max)

Supply Voltage:

400V

Phases:

3

Frequency:

50Hz

Motor Speed:

1500rpm

Each fan provides 100% of the design requirement and are of the centrifugal flow, double-inlet, backward-curved non-overloading design. The fans are V-belt-driven by air-cooled synchronous AC motors supplied by 400V 3-phase 50Hz power.


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Equipment Details – Port Process Module Water Lab Primary Air Filters Tag Number:

A-1774A-HCF-01-1774B-HCF-01

Location:


Manufacturer:

Freudenburg

Type:

T60

Airflow:

0.3m3/s

Filter Media Size:

595mm x 595mm x 650mm (1 off)


15°C

Outlet Salt Concentration: 0.05pp with inlet of 3.6ppm ∆P Clean:

50Pa

∆P Dirty:

400Pa

Primary Air Filters A-1776A-HCF-01 and A-1776B-HCF-01 contain a mediumefficiency pleated bag filter, 595mm x 595mm x 650mm, mounted in a stainless steel frame in the return/fresh air chamber of the AHU and are mounted in front of the evaporator coil. Filtration media in the unit is rot-proof, non-hygroscopic, inorganic and incapable of migration to the air stream and has a filtering efficiency of EU4 86% dust arrestance to BS-6540: 1985. Equipment Details – Sound Attenuator Tag Number:

HAS-1774

Location:

Port Process Module

No of Units:

1

System:

Supply Air

Type:

RAS 150/15

Exposure:

Outside

Airflow:

0.3m3/s

Face Velocity:

3.0m/s

Airway Velocity:

7.5m/s

Pressure Loss:

65Pa (max)

Temperature:

10/40°C

Size:

400mm x 250mm x 1250mm

The attenuator design provides minimum resistance to the airflow and produces the minimum differential pressure across the attenuator. External casing construction is in 1.5mm galvanised sheet steel, with acoustic material held in place by a 1mm perforated galvanised steel sheet. The acoustic material is 40/45kg/m3 mineral wool held in place by 3mm weld pins and washers. A close-weave Melinex glass cloth is fitted between the mineral wool and the perforated sheet, which prevents mineral wool fibres passing into the air stream.


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Mineral wool and Melinex glass cloth are both fire retardant to BS 476 Part 4 and 7. The mineral wool is non-combustible, non-hygroscopic, odour free and rot, damp and vermin proof, and is able to withstand sagging, erosion and disintegration. Equipment Details – Port Process Module Shut-off Damper Tag Number:

HDS-1794A/B

Location:

Port Process Module

No of Units:

2

System:

Air Inlet

Airflow:

0.3m3/s

Velocity:

2.0m/s

Resistance/Open:

10Pa (max)

Size:

600mm x 300mm x 200mm

Tag Number:

HDS-1796A/B

Location:

Port Process Module

No of Units:

1

System:

Supply Air

Airflow:

0.3m3/s

Velocity:

5.0m/s

Resistance/Open:

10Pa (max)

Size:

40mm x 300mm x 200mm

The shut-off damper is of a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.5mm 316 S11 stainless steel, with opposing action, are installed in the damper. Leakage through the damper in the closed position is minimised by sprung stainless steel side seals and top and bottom blade angle stops. This ensures that leakage through a closed damper is less than 0.1m3 per second per m2 of damper face area at a differential pressure of 2000N/m2. A blade position indicator enables a visual check of the status of the damper. Equipment Details – Port Process Module Water Lab Relief Damper Tag Number:

HDS-1797A/B

Location:

Port Process Module

No of Units:

1

System:

Relief Air

Airflow:

0.3m3/s

Velocity:

5.0m/s

Resistance/Open:

10Pa (max)

Size:

400mm x 300mm x 200mm


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Tag Number:

HRD-1774

Location:

Port Process Module

No of Units:

1

System:

Relief Air

Airflow:

0.3m3/s

Velocity:

5.0m/s

Resistance/Open:

10Pa (max)

Size:

400mm x 300mm x 200mm

The relief damper is a rectangular multi-blade construction housed in a 316 S11 stainless steel framework to ensure that the blades are maintained in proper alignment, thus preventing chattering and binding. Doubleskin aerofoil section blades of 1.0mm 316 S11 stainless steel, with opposing action, are installed. Damper opening is controlled by counterbalance weights which limit the opening of the blades against a required airflow or pressure. Adjustment is achieved by adding or removing counterweights for the required airflow or room pressure. Figure 3.16 details the port process module water lab Air Handling Unit A-1774A. The relevant tag numbers for Air Handling Units A-1774A/B are detailed in Table 3.21. Description

A-1774A

A-1774B


HDS-1794A

HDS-1794B

Air Outlet Dampers

HDS-1796A

HDS-1796B


HRD-1774


HDS-1797

Filter Coalescers

A-1774A-HCF-01

A-1774B-HCF-01

A-1774A-K-01

A-1774B-K-01

A-1774A-FM-01

A-1774B-FM-01

A-1774A-FM-02

A-1774B-FM-02


17-PDI-851

17-PDI-855


17-PDSH-851

17-PDSH-855



17-PDSL-850

Fan ∆P Switches

17-PDSL-852

17-PDSL-856


17-TSH-863

17-TSH-864


17-TS-853

17-TS-857

Table 3.21 – Port Process Module Water Lab AHUs A-1774A/B Tag Numbers


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CP

CP

COMMON AIR INLET

CP


ESS

CONDENSER FAN

M A-1774A-KM-02 MOTOR STOP


17 PDI 851

MOTOR STOP

CP

17 PDSH 851

ESS


M A.D.

CP

A.D.


FILTER COALESCER A-1774A-HCF01

AIR INLET TO A-1774B

17 PDSL 852 FAN P SWITCH 17-PDSL-852

17 TSH 863

FAN INLET TEMPERATURE SWITCH 17-TSH-863

17-XY-859

CP AIR OUTLET DAMPER HDS-1796A

CP

MCC AIR OUTLET TEMPERATURE SWITCH 17-TS-853

17 TS 853 ESS

CP

CP

FROM A-1774B

CP

ESS

HRD-1774

PORT PROCESS MODULE WATER LABORATORY (NOT TO SCALE)

COMMON OUTLET AIR DAMPER HDS-1797 AIR OUTLET

17 PDI 850 PORT PROCESS MODULE PRESSURE SWITCH 17-PDSL-850 17 CP PDSL 850


AC91003_VOL_032_022.ai

Figure 3.16 – Port Process Module Water Lab Air Handling Unit A-1774A


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2.9.3

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Port Process Module Water Lab Refrigeration System Equipment Details – Port Process Module Water Lab Condensers Tag Number:

A-1774A-HAC-01 -1774B-HAC-01

Location:


Manufacturer:


No of Condensers:

1


6.56kW

No of Fans:

1

Fan Speed:

1450rpm

Fan Airflow:

3.5m3/s each

Absorbed Power:

1.2kW

Driver Rating:

1.5kW


35°C


45°C

Compressor:

Frascold S7 33

Compressor Type:

Semi-hermetic

Refrigerant:

ISCEON 59

Absorbed Power:

9.0kW

Equipment Details – Port Process Module Water Lab Cooling Coils Tag Number:

A-1774A-HCC-01-1774B-HCC-01

Location:


Manufacturer:


Type:

DX-ST-2.1-50-375

No of Coils:

2

Airflow:

0.3m3/s

Air Inlet Coil:

35°Cdb

Air Outlet Coil:

16°Cdb

Sensible Load:

3.6kW

Refrigerant:

ISCEON 59

Pressure Drop:

68Pa (max)

Face Velocity:

1.6m/s

Refer to Figure 3.17 or NSV P&ID 6540-PP-PID-001. A Frascold S7 33 semi-hermetic-type refrigerant compressor supplies the evaporator section. The crankshaft is constructed in cast steel and moves lightweight aluminium con rods and pistons in steel cylinders. Positive lubrication is provided to all bearing surfaces and carbon shaft seal by a non-directional gear pump.


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The compressor is equipped with a suction strainer, oil sight glass, oil pressure equalisation and internal pressure relief. Each compressor is designed to provide 100% of the required cooling capacity, inclusive of sensible and latent heat, of the air handling unit and is located on top of the air handling unit. The condenser fans are four-bladed hub-type, manufactured in lightweight glass-fibre reinforced plastic. Each fan blade is non-sparking and is directly mounted to the condenser fan motor. The air-cooling coils are horizontal refrigerant condensers manufactured from copper tubes with aluminium fins, expanded on to galvanised steel end plates. A lacquer coating on the aluminium fins provides additional corrosion protection. Condenser discharge pipework is insulated with Class 0 Armaflex pipe insulation for personnel protection. Figure 3.17 details the port process module water lab refrigeration system for Air Handling Unit A-1774A. The relevant tag numbers for Air Handling Units A-1774A/B refrigeration system are detailed in Table 3.22. Description

A-1774A

A-1774B

Condenser Fans

A-1774A-FM-01

A-1774B-FM-01

Condenser Coils

A-1774A-HAC--01

A-1774B-HAC--01


17-RV-928

17-RV-934

Solenoid Valves

17-XY-930

17-XY-936

17-TCV-928

17-TCV-934

A-1774A-HCC-01

A-1774B-HCC-01

A-1774A-KM-02

A-1774B-KM-02


17-XY-928

17-XY-934


17-XV-929

17-XV-935


Table 3.22 – Tag Numbers for Port Process Module Water Lab Refrigeration System


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DERIVED FROM 6540-PP-PID-001



17 TCV 928

SOLENOID VALVE

17 PG 931A

17 XY 930

17 PSH 928

17 PSL 929

17 PSH 930

SIGHT GLASS

17 PSL 930


17 PG 931B

DRIER



17 RV 928


17 XV 929

RECEIVER

17 XY 928

CHECK VALVE


AC91003_VOL_032_013.ai


TO MCC


Figure 3.17 – Port Process Module Water Lab Refrigeration System


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3.0

CONTROL AND INSTRUMENTATION

3.1

Air Conditioning System Operation

3.1.1

Thermodynamic Principle Bonga topside module HVAC installations use a common operating philosophy and principle. Mechanical cooling is provided to each air conditioned area by a conventional refrigerant vapour compression, condensing and vaporisation circuit. The refrigerant is used as a heat transfer medium, absorbing heat from the air conditioned indoor area and exhausting the heat to atmosphere.

3.1.2

Installation Operation Maximum system availability and the ability to carry out off-line maintenance are achieved by 100% redundancy with two identical air handling units in each air conditioned area. Manual or automatic changeover determines operational and standby units. The supply fan in the duty air handling unit operates continuously at a constant speed and air flowrate regardless of temperature. All motors are powered from the motor control centre. Some motors, for example the supply fan motor, operate continuously whilst others such as the refrigeration compressor and air-cooled condenser fans are load dependent and cycle on demand. The cooling is controlled by a duct-mounted temperature sensor, which compares the supply air temperature to the thermostat set point. At the preset temperature, the refrigeration compressor and condenser fans are energised. Initially the compressor starts under no load in bypass mode via a bypass solenoid valve. After a few seconds, the solenoid valve is de-energised and closes, circulating refrigerant around the vapour compression circuit to cool the supply air. Cooling load on the coil is controlled by an externally equalised thermostatic expansion valve which monitors the evaporator outlet temperature. This temperature regulates the refrigerant entering the coil to ensure that the evaporated refrigerant gas does not become excessively superheated. The greater the superheat, the more refrigerant passes into the coil to compensate. The thermostatic expansion valve causes a sudden pressure drop in the refrigerant liquid which causes it to evaporate and absorb heat from the air. In addition, hot gas injection is used as a further control on the evaporating load. This raises the evaporating pressure and temperature by passing hot gas to the coil inlet, reducing the evaporating load. The heat absorbed in the coil and generated by the compressor is removed in the air-cooled condenser. A minimum of one condenser fan operates continuously when the compressor is energised. The other condenser fans are regulated by fan pressure switches, which are located on the AHU.


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At preset pressures the pressure switch energises the remaining condenser fans as required. This increases the heat rejection capacity of the condenser in a series of controlled steps. When the pressure falls to a preset level, the fans are de-energised as necessary. Depending on the internal heat load and ambient outdoor temperatures, some or all of the fans will operate intermittently or continuously. In addition to cooling the air (sensible cooling), the AHU also dehumidifies the air (latent cooling). This is because cooled air cannot hold as much water vapour as warm air. Therefore to cool below a certain temperature requires moisture to be removed. Some of the larger AHUs have a supply of recirculated air from the area and a smaller percentage of fresh air. The two streams are mixed prior to passing through the filters and coiling coil. The advantage of mixing recirculated and fresh air is a resultant lower humidity level of the mixture. This in turn reduces the amount of latent cooling required to achieve the sensible cooling to offset the electrical equipment output in the conditioned space. Smaller AHUs, including those dedicated to battery rooms operate solely with fresh air, since battery room supplies may contain gases etc, which cannot be recirculated. 3.1.3

Refrigeration System Pressures There are pressure gauges on the refrigeration circuit, with high and low refrigerant pressure gauges on all units and oil pressure gauges on larger units. It is important to note that there is no correct pressure, whether operating or idle, as many factors can have a bearing on the system pressures. Generally, the high-pressure gauge should indicate a pressure of approximately three times that of the low-pressure gauge. The oil pressure gauge should remain steady and indicate a good positive pressure when the compressor is running. When the system is switched on/off under controlled operations, the high-pressure gauge should show a higher pressure, whilst the low-pressure gauge will show a lower pressure.


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3.2

HVAC Controls

3.2.1

General

Unrestricted

Each HVAC System is controlled and monitored by local control panels located in the enclosed area served by the relevant system. The local control panel for the turbine generator rooms is located in the power module switchroom in addition to the panel for the power module switchroom itself. HVAC System operation is automatic. Start-up of the relevant supply or extract fans energises the system controls and allows the complete system to operate automatically providing there are no active Emergency Support System (ESS) trips. The HVAC Systems interface with the Pressure Safety Control System (PSCS). HVAC Systems are totally shut down by the ESS on selected alarm and fault conditions. All fans shut-off dampers are inhibited from starting or opening until the ESS permissive has been restored. 3.2.2

ESS Controls HVAC equipment and panels are powered from distribution panels located in the respective modules. Each enclosure air intake is equipped with gas and smoke detectors. On detection of confirmed gas or smoke, the air inlet and outlet dampers are closed by the ESS. This scenario leaves the HVAC System operating on recirculating mode to maintain room conditions. The HVAC System is shut down by the ESS on detection of confirmed gas or smoke by detector in the room. On loss of room pressurisation, an alarm is generated in the Central Control Room (CCR). Where possible, the system remains operational, to maintain room conditions. When HVAC equipment is operational, a running status signal is displayed on the ESS in the CCR. On confirmed fire detection in the turbine generator rooms, the ESS shuts down the extract fans and closes the dampers prior to initiation of the water mist system.


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Power Module Main Switchroom HVAC Control Local Control Panel LCP-1770 controls the following: •

Supply Fans A-1770A-K-01 and A-1770B-K-01

•

Chillers A-1770A-HAC-01 and A-1770B-HAC-01

The supply fans and chillers are part of Air Handling Units AHU-1770A/B. 3.3.1

Supply Fan Control The supply fans can be started at Local Control Panel LCP-1770 or at the DCS. Control selection is made via a local manual/auto selector switch on LCP-1770. When auto is selected, Supply Fan A-1770A-K-01 or A-1770B-K-01 should be selected for duty at the duty/standby selector switch on LCP-1770. When manual is selected, either supply fan can be started at the appropriate local start pushbutton. On manual, the fan selector switch is not active and an interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that Supply Fan A-1770A-K-01 is to be started. When A-1770A-K-01 pushbutton is operated, the control system checks that the fan is available from the Motor Control Centre (MCC), before opening the outlet dampers associated with the respective air handling unit. Shut-off dampers HDS-1770A/B and HDS-1773 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1770. Only dampers HDS-1771A and HDS-1772A/B are controlled from LCP-1770. When the outlet dampers are confirmed open, fan A-1770A is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit initiate shutdown and provide indication, alarms and changeover to standby. The system is shut down as follows: •

Operation of fan stop pushbuttons

•

2-out-of-2 voting shutdown from the ESS

•

Selecting manual control

•

Operation of the shutdown pushbutton at the AHU

Note: If A-1770A-K-01 is running and the stop pushbutton is operated, A-1770A-K-01 will stop. However, because A-1770B-K-01 is in standby mode, this fan will automatically start.


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Auto Control The following description assumes that both fans are available and that A-1770A-K-01 is to be started, with A-1770B-K-01 on standby. When auto is selected and the start signal is received from the DCS, the control system checks that Fan A is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1770A/B and HDS-1773 are controlled from the ESS. The shut-off dampers status signals, confirming open/closed position are repeated on LCP-1770. Only dampers HDS-1771A and HDS-1772A/B are controlled from LCP-1770. When the outlet dampers are confirmed open, Fan A-1770A is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit initiate shutdown and provide indication, alarms and changeover to standby. The system is shut down as follows:

3.3.2

•

Stop signal from LCP-1770

•

Selecting manual at LCP-1770

•


Pressure Monitoring Pressure Differential Indicator 17-PDI-701 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. If the room pressure falls to 40Pa, an alarm is generated at LCP-1770 and a common fault signal is transmitted to the Distributed Control System (DCS). Pressure Differential Switch 17-PDSL-703 monitors the differential pressure across the supply fans. If the differential pressure reaches 10Pa, a local alarm and a common fault signal to the DCS is generated and an AHU changeover initiated. Limit switches monitor the positions of the dampers on AHUs A-1770A and A-1770B. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-702 monitors the differential pressure across the inlet filter and if the differential pressure reaches 300Pa, an alarm is generated at LCP-1770 via 17-PDSL-702 and a common fault at the DCS is initiated.

3.3.3

Temperature Monitoring Air inlet temperature to the supply fan is monitored by 17-TSH-746, which generates a high temperature alarm at LCP-1770 and a common fault alarm at the DCS. The temperature of the air leaving the AHU is monitored by 17-TS-704, which is set at 30°C. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.


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Motor Monitoring On fan motors A-1770A-KM-01 and A-1770B-KM-01 a signal is transmitted to LCP-1770, which initiates running, stopped, tripped and available status displays. If it is necessary to change over air handling units, the fans may be changed by operation of the stop pushbutton on LCP-1770 for the running fan. A compressor or condenser motor fault detected at the MCC stops the affected piece of equipment. However, the chiller may still operate if one or more of the condenser fans has failed or is unavailable. This is to ensure maximum availability of the system. All motor faults are monitored by the MCC.

3.3.5

Refrigeration Control The following description refers to A-1770A refrigeration skid. The relevant tag numbers for A-1770A/B are detailed in Table 3.23. Pressure Gauges 17-PG-885A/B/C monitor the following parameters on Refrigerant Compressor A-1770-K-02: •

17-PG-885A Compressor Oil Pressure

•

17-PG-885B Refrigeration HP Pressure

•

17-PG-885C Refrigeration LP Pressure

The following pressure switches monitor the refrigerant compressor as follows: •

Compressor Oil Pressure Switch 17-PSL-880 generates an alarm on LCP-1770 and a common alarm on the DCS at 2.17barg

•

Refrigeration LP Safety Switch 17-PSL-883 initiates a shutdown of the refrigerant compressor at a pressure of 90psig. When the pressure returns to 90psig, the compressor is auto reset

•

Refrigeration LP Safety Switch 17-PSL-884 initiates a shutdown of the refrigerant compressor at a pressure of 20psig. The compressor requires to be manually reset following activation of 17-PSL-884

•

Refrigeration HP Safety Switch 17-PSH-884 initiates a shutdown of the refrigerant compressor at a pressure of 350psig. The compressor requires to be manually reset following activation of 17-PSH-884

•

Refrigeration HP Safety Switch 17-PSH-881 on Condenser Fan 3 initiates a shutdown of the refrigerant compressor at a pressure of 20.69barg. When the pressure returns to 23.41barg, the compressor is auto reset

•

Refrigeration HP Safety Switch 17-PSH-882 on Condenser Fan 4 initiates a shutdown of the refrigerant compressor at a pressure of 22.41barg. The compressor requires to be manually reset following activation of 17-PSH-882


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Instrument

A-1770A

A-1770B

Compressor Oil Pressure

17-PG-885A

17-PG-893A

Refrigeration HP Pressure

17-PG-885B

17-PG-893B

Refrigeration LP Pressure

17-PG-885C

17-PG-893C

Compressor Oil Pressure Switch

17-PSL-880

17-PSL-888

Refrigeration LP Safety Switch

17-PSL-883

17-PSL-891


17-PSL-884

17-PSL-892

Refrigeration HP Safety Switch

17-PSH-884

17-PSH-892

Refrigeration HP Safety Switch Condenser Fan 3

17-PSH-881

17-PSH-889

Refrigeration HP Safety Switch Condenser Fan 4

17-PSH-882

17-PSH-890

Table 3.23 – A-1770A/B Refrigeration Skid Tag Numbers 3.3.6

Maintenance If maintenance is required on the running AHU, isolating at the Local Control Panel (LCP)/MCC or operating the local AHU pushbutton initiates auto changeover. Instrument Tag Number

Low Low Trip

Low Alarm

High Alarm

High High Trip

Controller Set Point

Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings 17-PDSL-701

40Pa A-1770A

17-PDSH-702 17-PDSL-703

300Pa 10Pa

17-TS-704

30°C

17-TSH-746

X

17-PSH-884

X

17-PSH-881

X

17-PSH-882

X

17-PSL-884

X

17-PSL-883

X

17-PSL-880

X

Table 3.24 – Power Module Main Switchroom Alarms and Trips


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Unrestricted

Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings A-1770B 17-PDSH-706 17-PDSL-707

300Pa 10Pa

17-TS-708

30°C

17-TSH-747

X

17-PSH-892

X

17-PSH-889

X

17-PSH-890

X

17-PSL-892

X

17-PSL-891

X

17-PSL-888

X

Table 3.24 – Power Module Main Switchroom Alarms and Trips (cont’d) 3.3.7

Local Control Panel LCP-1770 LCP-1770 contains the following control and display functions for Power Module Main Switchroom Air Handling Units A-1770A/B: •

Available, running, stopped and tripped status lamps

•

Start and stop selector switches

•

Damper open and closed status lamps

•

Air handling unit high temperature alarm

•

Loss of room pressure alarm

•

Filter high differential pressure alarm

•

Duty/standby selector

•

Manual/auto selector

•

Lamp test


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Power Module Battery Room HVAC Control Local Control Panel LCP-1771 controls the following: •


•



Supply Fan Control The supply fans can be started at Local Control Panel LCP-1771 or at the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1771. When auto is selected, Supply Fan A-1775A-K-01 or A-1775B-K-01 should be selected for duty at selector switch on LCP-1771. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1775A-K-01 is to be started. When A-1775A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1790A and HDS-1795 are controlled from the ESS. The shut-off dampers status signals, confirming open/closed position are repeated on LCP-1771. Only dampers HDS-1774A/B are controlled from LCP-1771. When the outlet dampers are confirmed open, A-1775A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•


•


•


Note: If A-1775A-K-01 is running and the stop pushbutton is operated, A-1775A-K-01 will stop. However, because A-1775B-K-01 is in standby mode, this fan will automatically start.


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Auto Control The following description assumes that both fans are available and that A-1775A-K-01 is to be started, with A-1775B-K-01 in standby. When auto is selected and the start signal is received from the DCS, the control system checks that Fan A is available from the MCC, before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1790A and HDS-1795 are controlled from the ESS. The shut-off dampers status signals, confirming open/closed position are repeated on LCP-1771. Only dampers HDS-1771A and HDS-1772A/B are controlled from LCP-1771. When the outlet dampers are confirmed open, A-1775A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit initiate shutdown and provide indication, alarms and changeover to standby. The system is shut down as follows:

3.4.2

•


•


•


Pressure Monitoring Pressure Differential Indicator 17-PDI-810 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1771 via PDAL-810 and a common fault signal transmitted to the DCS. Pressure Differential Switch 17-PDSL-812 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS is generated and an AHU changeover initiated. The positions of the dampers on AHU A-1770A and A-1770B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-811 monitors the differential pressure across the filter and if the differential pressure reaches 300Pa, an alarm is generated at LCP-1771 and a common fault at the DCS is initiated.

3.4.3

Temperature Monitoring Air inlet temperature to the supply fan is monitored by Temperature Switch 17-TSH-823, which generates a high temperature alarm at LCP-1771 and a common fault alarm at the DCS. Temperature Switch 17-TS-813 monitors the temperature of the air leaving the AHU. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.


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Motor Monitoring On Fan Motors A-1775A-KM-01 and A-1775B-KM-01 a signal is transmitted to LCP-1771 which initiates running, stopped, tripped and available status displays. If it is necessary to change over air handling units, the fans may be changed by operation of the stop pushbutton on LCP-1771 for the running fan. A compressor or condenser motor fault detected at the MCC stops the affected piece of equipment. However, the chiller may still operate if one or more of the condenser fans has failed or is unavailable. This is to ensure maximum availability of the system. All motor faults are monitored by the MCC.

3.4.5

Refrigeration Control The following description refers to A-1775A refrigeration skid. The relevant tag numbers for A-1775A/B are detailed in Table 3.25. Pressure Gauges 17-PG-944A/B/C monitor the following parameters on Refrigerant Compressor A-1775-K-02: •


•


•




•

Refrigeration LP Switch 17-PSL-942 initiates a shutdown of the refrigerant compressor at a pressure of 90psig. When the pressure returns to 90psig, the compressor is auto reset

•


•


•

Refrigeration HP Switch 17-PSH-941 initiates a shutdown of the refrigerant compressor at a pressure of 20.69barg. When the pressure returns to 21.69barg, the compressor is auto reset


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Instrument

A-1775A

A-1775B


17-PG-944A

17-PG-951A


17-PG-944B

17-PG-951B


17-PG-944C

17-PG-951C


17-PSL-940

17-PSL-947

Refrigeration LP Switch

17-PSL-942

17-PSL-949


17-PSL-943

17-PSL-950


17-PSH-943

17-PSH-950

Refrigeration HP Switch Condenser

17-PSH-941

17-PSH-948


Maintenance If maintenance is required on the running AHU, isolating at the LCP/MCC or operating the local AHU pushbutton initiates auto changeover. Instrument Tag Number

Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings A-1775A 17-PDSL-810

X

17-PDSH-811 17-PDSL-812

X X

17-TS-813

X

17-TSH-823

X

17-PSH-943

X

17-PSH-941

X

17-PSL-943

X

17-PSL-942

X

17-PSL-940

X

Table 3.26 – Power Module Battery Room Alarms and Trips


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Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings A-1775B 17-PDSH-815 17-PDSL-816

X X

17-TS-817

X

17-TSH-824

X

17-PSH-950

X

17-PSH-948

X

17-PSL-950

X

17-PSL-949

X

17-PSL-947

X

Table 3.26 – Power Module Battery Room Alarms and Trips (cont’d) 3.4.7

Local Control Panel LCP-1771 LCP-1771 contains the following control and display functions for power module battery room Air Handling Units A-1775A/B: •


•


•


•


•


•


•


•


•

Lamp test


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Turbine Generators HVAC Control Local Control Panel LCP-1777 controls the following: •

K-1776A/B Turbine Generator A

•

K-1777A/B Turbine Generator B

•

K-1778A/B Turbine Generator C

•

K-1779A/B Turbine Generator D

There are four turbine generator rooms, each with a pair of extract fans, which normally operate in a duty/standby mode. However, if the generator room temperature rises above 38°C, both extract fans will run if available. 3.5.1

Extract Fan Control The extract fans can be started at Local Control Panel LCP-1777 or at the DCS. Manual or auto control for Turbine A is selected on LCP-1777 via a local manual/remote auto selector switch. When auto is selected, a second selector switch is used to select either fan K-1776A or K-1776B as duty. Manual or auto control for Turbine B is selected on LCP-1777 via a local manual/remote auto selector switch. When auto is selected, a second selector switch is used to select either fan K-1777A or K-1777B as duty. Manual or auto control for Turbine C is selected on LCP-1777 via a local manual/remote auto selector switch. When auto is selected, a second selector switch is used to select either fan K-1778A or K-1778B as duty. Manual or auto control for Turbine D is selected on LCP-1777 via a local manual/remote auto selector switch. When auto is selected, a second selector switch is used to select either fan K-1779A or K-1779B as duty. When manual is selected, either fan can be started by activation of the relevant start pushbutton. The fan duty selector switch is not active when manual is selected. Manual Control The following description details the manual control for Turbine Room A. Turbine Rooms B, C and D are identical. For details of the relevant tag numbers for Turbine Rooms B, C and D, refer to Table 3.27. It is assumed that both fans are available and that K-1776A is to be started. When K-1776A pushbutton is operated, the control system checks that K-1776A is available from the MCC. Fire Dampers HGD-1777A and HGD-1776A are controlled from the ESS. The damper status signals, confirming open/closed position are repeated on LCP-1777. When the outlet dampers are confirmed open, K-1776A is started from the MCC. The system is shut down as follows: •


•



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Turbine Room

Fans

Inlet Fire Damper

Outlet Fire Damper

A

K-1776A/B

HGD-1776A

HGD-1777A

B

K-1777A/B

HGD-1776B

HGD-1777B

C

K-1778A/B

HGD-1776C

HGD-1777C

D

K-1779A/B

HGD-1776D

HGD-1777D

Table 3.27 – Turbine Room Tag Numbers Auto Control The following description details the auto control for Turbine Room A. Turbine Rooms B, C and D are identical. For details of the relevant tag numbers for Turbine Rooms B, C and D, refer to Table 3.27 In Turbine Room A, when auto is selected and the start signal is received from the DCS, the control system checks that K-1776A is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Fire Dampers HGD-1777A and HGD-1776A are controlled from the ESS. The damper status signals confirming open/closed position are repeated on LCP-1777. When the outlet dampers are confirmed open, K-1776A is started from the MCC. The system is shut down as follows:

3.5.2

•


•


•

From LCP-1777

Pressure Monitoring The following description details the pressure monitoring of Turbine Generator Room A. Table 3.28 lists the relevant pressure devices for Turbine Generator Rooms A, B, C and D. Pressure Differential Switches 17-PDSL-720/721 monitor the differential pressure of K-1776A and K-1776B respectively. If the differential pressure reaches 10Pa, a local alarm and a common fault signal to the DCS is generated and a fan changeover initiated. The positions of the inlet and outlet dampers are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Switch 17-PDI-722 monitors the pressure in Turbine Room A and if the differential pressure reaches 300Pa, an alarm at LCP-1777 and a common fault at the DCS are initiated.


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Turbine A

Turbine B

Turbine C

Turbine D

Fan A ∆P

17-PDSL-720

17-PDSL-723

17-PDSL-726

17-PDSL-729

Fan B ∆P

17-PDSL-721

17-PDSL-724

17-PDSL-727

17-PDSL-730

Table 3.28 – Turbine Room Tag Numbers (Instrumentation) 3.5.3

Temperature Monitoring Temperature Transmitter 17-TT-863 monitors the temperature of the turbine room exhaust air. A high temperature alarm is generated and if the temperature exceeds 38°C, the standby fan will automatically start.

3.5.4

Fan Motor Monitoring On Fan Motors KM-1776A/B a signal is transmitted to LCP-1777, which initiates running, stopped, tripped and available status displays. All motor faults are monitored by the MCC.

3.5.5

Maintenance An extract fan can be taken off line at the MCC. ‘Local Manual’ should be selected during maintenance of a non-operational fan.


Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings Turbine A 17-PDSL-720

X

17-PDSL-721

X

17-PDSH-722

X

17-TSH-863

X Turbine B

17-PDSL-723

X

17-PDSL-724

X

17-PDSH-725

X

17-TSH-864

X

Table 3.29 – Turbine Generator Rooms Alarms and Trips


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Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings Turbine C 17-PDSL-726

X

17-PDSL-727

X

17-PDSH-728

X

17-TSH-865

X Turbine D

17-PDSL-729

X

17-PDSL-730

X

17-PDSH-731

X

17-TSH-866

X

Table 3.29 – Turbine Generator Rooms Alarms and Trips (cont’d) 3.5.6

Local Control Panel LCP-1777 LCP-1777 contains the following control and display functions for Turbine Generator Rooms A to D:

3.6

•


•


•


•


•


•


Starboard Subsea Module Auxiliary Switchroom HVAC Control Local Control Panel LCP-1772 controls the following: •


•


The supply fans and chillers are part of Air Handling Units AHU-1771A/B.


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Supply Fan Control The supply fans can be started at Local Control Panel LCP-1772 or at the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1772. When auto is selected, Supply Fan A-1771A-K-01 or A-1771B-K-01 should be selected for duty via a selector switch on LCP-1772. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1771A-K-01 is to be started. When A-1771A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC, before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1778A/B and HDS-1781 are controlled from the ESS. The shut-off dampers status signals, confirming open/closed position, are repeated on LCP-1772. Only dampers HDS-1779A/B and HDS-1780A/B are controlled from LCP-1772. When the outlet dampers are confirmed open, A-1771A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•


•


•


Note: If A-1771A-K-01 is running and the stop pushbutton is operated, A-1771A-K-01 will stop. However, because A-1771B-K-01 is in standby mode, this fan will automatically start. Auto Control The following description assumes that both fans are available and that A-1771A-K-01 is to be started, with A-1771B-K-01 in standby. When auto is selected and the start signal is received from the DCS, the control system checks that A-1771A-K-01 is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1778A/B and HDS-1781 are controlled from the ESS. The shut-off dampers status signals, confirming open/closed position, are repeated on LCP-1772.


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Only dampers HDS-1779A/B and HDS-1780A/B are controlled from LCP-1772. When the outlet dampers are confirmed open, A-1771A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows:

3.6.2

•


•


•


Pressure Monitoring Pressure Differential Indicator 17-PDI-750 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1772 via PDAL-750 and a common fault signal transmitted to the DCS. Pressure Differential Switch 17-PDSL-752 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS is generated, and an AHU changeover initiated. The position of the dampers on AHUs A-1771A and A-177B is monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-751 monitors the differential pressure across the filter and if the differential pressure reaches 300Pa, an alarm is generated at LCP-1772 and a common fault at the DCS is initiated.

3.6.3

Temperature Monitoring Air inlet temperature to the supply fan is monitored by 17-TSH-765, which generates a high-temperature alarm at LCP-1772 and a common fault alarm at the DCS. Temperature Switch 17-TS-753 monitors the temperature of the air leaving the AHU. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.

3.6.4

Motor Monitoring On Fan Motors A-1771A-KM-01 and A-1771B-KM-01 a signal is transmitted to LCP-1772 which initiates running, stopped, tripped and available status displays. If it is necessary to change over air handling units, the fans may be changed by operation of the stop pushbutton on LCP-1772 for the running fan.


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A compressor or condenser motor fault detected at the MCC stops the affected piece of equipment. However, the chiller may still operate if one or more of the condenser fans has failed or is unavailable. This is to ensure maximum availability of the system. All motor faults are monitored by the MCC. 3.6.5

Refrigeration Control The following description refers to A-1771A Refrigeration Skid. The relevant tag numbers for A-1771A/B are detailed in Table 3.30. Pressure Gauges 17-PG-900A/B/C monitor the following parameters on Refrigerant Compressor A-1771-K-02: •


•


•




•


•


•


•



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Instrument

A-1771A

A-1771B


17-PG-900A

17-PG-907A


17-PG-900B

17-PG-907B


17-PG-900C

17-PG-907C


17-PSL-896

17-PSL-903


17-PSL-898

17-PSL-905


17-PSL-899

17-PSL-906


17-PSH-899

17-PSH-906

Refrigeration HP Switch Condenser

17-PSH-897

17-PSH-904


Maintenance An AHU can be taken off line at LCP-1772 or the MCC. If maintenance is required on the running AHU, isolating at the LCP/MCC or operating the local AHU pushbutton initiates auto changeover.


Low Low Trip

Low Alarm

High Alarm

High High Trip

Controll er Set Point

Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings 17-PDSL-750 17-PDSL-752

X X

17-TS-753

X

17-PDSH-751

X

17-TSH-765

X

17-PDSL-756

X

17-PSH-899

X

17-PSH-897

X

17-PSL-899

X

17-PSL-898

X

17-PSL-896

X

Table 3.31 – Starboard Subsea Module Auxiliary Switchroom Alarms and Trips


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Local Control Panel LCP-1772 LCP-1772 contains the following control and display functions for starboard subsea module auxiliary switchroom Air Handling Units A-1771A/B:

3.7

•


•


•


•


•


•


•


•

Lamp test

Starboard Subsea Module Battery Room HVAC Control Local Control Panel LCP-1773 controls the following: •


•



Supply Fan Control The supply fans can be started at Local Control Panel LCP-1773 or at the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1773. When auto is selected, Supply Fan A-1776A-K-01 or A-1776B-K-01 should be selected for duty via a selector switch on LCP-1773. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1776A-K-01 is to be started. When A-1776A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off dampers HDS-1791A/B and HDS-1782 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1773. Only dampers HDS-1783A/B are controlled from LCP-1773. When the outlet dampers are confirmed open, A-1776A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby.


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The system is shut down as follows: •


•


•


•


Note: If A-1776A-K-01 is running and the stop pushbutton is operated, A-1776A-K-01 will stop. However, because A-1776B-K-01 is in standby mode, this fan will automatically start. Auto Control The following description assumes that both fans are available and that A-1776A-K-01 is to be started, with A-1776B-K-01 in standby. When auto is selected and the start signal is received from the DCS, the control system checks that the fan is available from the MCC, before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1791A/B and HDS-1782 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1773. Only dampers HDS-1783A/B are controlled from LCP-1773. When the outlet dampers are confirmed open, A-1776A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows:

3.7.2

•


•


•


Pressure Monitoring Pressure Differential Indicator 17-PDI-830 monitors the room pressure. A time delay is incorporated in the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1773 through PDAL-830 and a common fault signal transmitted to the DCS. Pressure Differential Switch 17-PDSL-832 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS are generated, and an AHU changeover initiated. The positions of the dampers on AHU A-1776A and A-1776B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-831 monitors the differential pressure across the filter and if the differential pressure reaches 300Pa an alarm is generated at LCP-1773, and a common fault at the DCS is initiated.


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Temperature Monitoring Air inlet temperature to the supply fan is monitored by Temperature Switch 17-TSH-843 which generates a high temperature alarm at LCP-1773 and a common fault alarm at the DCS. Temperature Switch 17-TS-833 monitors the temperature of the air leaving the AHU. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.

3.7.4


3.7.5

Refrigeration Control The following description refers to A-1776A Refrigeration Skid. The relevant tag numbers for A-1776A/B are detailed in Table 3.32. Pressure Gauges 17-PG-957A/B monitor the following parameters on Refrigerant Compressor A-1776-K-02: •

17-PG-957A Refrigeration HP Pressure

•

17-PG-957B Refrigeration LP Pressure

The following pressure switches monitor the refrigerant compressor: •


•


•


•



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Instrument

A-1776A

A-1776B


17-PG-957A

17-PG-963A


17-PG-957B

17-PG-963B


17-PSL-955

17-PSL-961


17-PSL-956

17-PSL-962


17-PSH-956

17-PSH-962

Refrigeration HP Switch

17-PSH-954

17-PSH-960



Low Low Trip

Low Alarm

High Alarm

High High Trip



X X

17-TS-833

X

17-PDSH-831

X

17-TSH-843

X

17-PSH-956

X

17-PSH-954

X

17-PSL-956

X

17-PSL-955

X

Table 3.33 – Starboard Subsea Module Battery Room Alarms and Trips


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3.7.7

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Local Control Panel LCP-1773 LCP-1773 contains the following control and display functions for starboard subsea module battery room A-1776A/B:

3.8

•


•


•


•


•


•


•


•


•

Lamp test

Compressor Control Module HVAC Control Local Control Panel LCP-1774 controls the following: •


•



Supply Fan Control The supply fans can be started at Local Control Panel LCP-1772 or at the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1774. When auto is selected, Supply Fan A-1772A-K-01 or A-1772B-K-01 should be selected for duty via a selector switch on LCP-1774. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1772A-K-01 is to be started. When A-1776A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1784A/B and HDS-1787 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1772. Only dampers HDS-1786A/B and HDS-1785A/B are controlled from LCP-1774. When the outlet dampers are confirmed open, A-1772A-K-01 is started from the MCC.


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The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•


•


•


Note: If A-1772A-K-01 is running and the stop pushbutton is operated, A-1772A-K-01 will stop. However, because A-1772B-K-01 is in standby mode, this fan will automatically start. Auto Control The following description assumes that both fans are available and that A-1772A-K-01 is to be started with A-1772A-K-01 in standby. When auto is selected and the start signal is received from the DCS, the control system checks that the fan is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1784A/B and HDS-1787 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1772. Only dampers HDS-1786A/B and HDS-1785A/B are controlled from LCP-1774. When the outlet dampers are confirmed open, A-1772A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•


•



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3.8.2

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Pressure Monitoring Pressure Differential Indicator 17-PDI-770 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1774 via PDAL-770 and a common fault signal transmitted to the DCS. Pressure Differential Switch 17-PDSL-772 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS are generated and an AHU changeover initiated. The positions of the dampers on AHUs A-1772A and A-1772B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-771 monitors the differential pressure across the filter and if the differential pressure reaches 300Pa, an alarm is generated at LCP-1774 and a common fault at the DCS is initiated.

3.8.3

Temperature Monitoring Air inlet temperature to the supply fan is monitored by 17-TSH-785, which generates a high temperature alarm at LCP-1774 and a common fault alarm at the DCS. Temperature Switch 17-TS-773 monitors the temperature of the air leaving the AHU. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.

3.8.4


3.8.5



•


•



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•


•


•


•

Refrigeration HP Switch, Condenser Fan 2 17-PSH-911 initiates a shutdown of the refrigerant compressor at a pressure of 20.69barg. When the pressure returns to 21.69barg, the compressor is auto reset

•

Refrigeration HP Switch, Condenser Fan 3 17-PSH-912 initiates a shutdown of the refrigerant compressor at a pressure of 23.41barg. When the pressure returns to 22.41barg, the compressor is auto reset Instrument

A-1772A

A-1772B


17-PG-915A

17-PG-907A


17-PG-915B

17-PG-907B


17-PG-915C

17-PG-907C


17-PSL-910

17-PSL-903


17-PSL-914

17-PSL-905


17-PSL-913

17-PSL-906


17-PSH-914

17-PSH-906

Refrigeration HP Switch Fan 2

17-PSH-911

17-PSH-904

Refrigeration HP Switch Fan 3

17-PSH-912

17-PSH-904

Table 3.34 – A-1772A/B Refrigeration Skid Tag Numbers


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3.8.6

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Low Low Trip

Low Alarm

High Alarm

High High Trip



X X

17-TS-773

X

17-PDSH-771

X

17-TSH-785

X

17-PSH-914

X

17-PSH-911

X

17-PSL-913

X

17-PSL-914

X

Table 3.35 – Compressor Control Module Alarms and Trips 3.8.7

Local Control Panel LCP-1774 LCP-1774 contains the following control and display functions for compressor module Air Handling Units A-1772A/B: •


•


•


•


•


•


•


•


•

Lamp test


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3.9

Unrestricted

Compressor Control Module Battery Room HVAC Control Local Control Panel LCP-1775 controls the following: •


•



Supply Fan Control The supply fans can be started at Local Control Panel LCP-1775 or at the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1775. When auto is selected, Supply Fan A-1777A-K-01 or A-1777A-K-01 should be selected for duty via a selector switch on LCP-1775. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1777A-K-01 is to be started. When A-1777A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1784A/B and HDS-1787 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1775. Only dampers HDS-1786A/B and HDS-1785A/B are controlled from LCP-1775. When the outlet dampers are confirmed open, Fan A-1777A is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•


•


•


Note: If A-1777A is running and the stop pushbutton is operated, A-1777A will stop. However, because A-1777B is in standby mode, this fan will automatically start.


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Auto Control The following description assumes that both fans are available and that A-1777A is to be started, with A-1777B in standby. When auto is selected and the start signal is received from the DCS, the control system checks that A-1777A is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1784A/B and HDS-1787 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1775. Only dampers HDS-1786A/B and HDS-1785A/B are controlled from LCP-1775. When the outlet dampers are confirmed open, Fan A-1777A is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows:

3.9.2

•


•


•


Pressure Monitoring Pressure Differential Indicator 17-PDI-790 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1775 via PDAL-790 and a common fault signal is transmitted to the DCS. Pressure Differential Switch 17-PDSL-792 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS are generated and an AHU changeover initiated. The positions of the dampers on Air Handling Units A-1777A/B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan changes over to standby. Pressure Differential Indicator 17-PDI-791 monitors the differential pressure across the filter. When the differential pressure reaches 300Pa, an alarm is generated at LCP-1775 and a common fault at the DCS is initiated.


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3.9.3

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Temperature Monitoring Supply fan air inlet temperature is monitored by Temperature Switch 17-TSH-803 which generates a high temperature alarm at LCP-1775 and a common fault alarm at the DCS. Temperature Switch 17-TS-793 monitors the AHU outlet temperature. This temperature is used to control the chiller solenoid valves. High and low pressure switches are installed to start/stop the refrigerant compressor and a high pressure control switch controls the condenser fan motor.

3.9.4

Motor Monitoring Running, stopped, tripped and available status displays for Supply Fan Motors A-1777A-KM-01 and A-1777B-KM-01 are displayed on LCP-1775. The fans may be changed by operation of the stop pushbutton on LCP-1775 for the running fan. A compressor or condenser motor fault detected at the MCC stops the affected piece of equipment. However, the chiller may still operate if one or more of the condenser fans has failed or is unavailable. This is to ensure maximum availability of the system. All motor faults are monitored by the MCC.

3.9.5



•


•




•


•


•


•



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Instrument

A-1777A

A-1777B


17-PG-970A

17-PG-977A


17-PG-970B

17-PG-977B


17-PG-970C

17-PG-977C


17-PSL-966

17-PSL-973


17-PSL-968

17-PSL-975


17-PSL-969

17-PSL-976


17-PSH-969

17-PSH-976


17-PSH-967

17-PSH-974



Low Low Trip

Low Alarm

High Alarm

High High Trip



X X

17-TS-793

X

17-PDSH-791

X

17-TSH-803

X

17-PSH-969

X

17-PSH-967

X

17-PSL-968

X

17-PSL-966

X

X

Table 3.37 – Compressor Control Module Battery Room Alarms and Trips


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3.9.7

Unrestricted

Local Control Panel LCP-1775 LCP-1775 contains the following control and display functions for compressor control module battery room AHU A-1777A/B:

3.10

•


•


•


•


•


•


•


•


•

Lamp test

Chemical and Methanol Cofferdam HVAC Control Local Control Panel LCP-1778 controls Extract Fans K-1780A and K-1780B, which serve the chemical and methanol tank areas respectively, to provide adequate ventilation. LCP-1778 does not control the dampers and only indicates damper position.

3.10.1

Extract Fan Control The extract fans can be started at Local Control Panel LCP-1778 or at the DCS. Manual Control When K-1780A start pushbutton is activated, the control system ensures the availability of K-1780A from the MCC. Shut-off Dampers HDS-1798A and HDS-1799A are controlled by the ESS and the damper positions are repeated on LCP-1778. When HDS-1798A and HDS-1799A are confirmed open, K-1780A is started and should be run for a minimum of 1 hour to ensure adequate ventilation of the cofferdam. K-1780A is stopped as follows: •

Activation of the stop pushbutton on LCP-1778

•


•

Pressing the emergency stop pushbutton at the fan

When K-1780B start pushbutton is activated, the control system ensures the availability of K-1780B from the MCC. Shut-off Dampers HDS-1798B and HDS-1799B are controlled by the ESS and the damper positions are repeated on LCP-1778. When HDS-1798B and HDS-1799B are confirmed open, K-1780B is started and should be run for a minimum of 1 hour to ensure adequate ventilation of the cofferdam.


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K-1780B is stopped as follows: •


•


•


Auto Control When a start signal is received from the DCS, the control system ensures that K-1780A and B are available from the MCC. Shut-off Dampers HDS-1798A, HDS-1799A, HDS-1798B and HDS-1799B are controlled from the ESS. When the associated dampers are confirmed open, K-1780A and B are started and should be run for a minimum of 1 hour to ensure adequate ventilation of the cofferdam. The fans are stopped as follows:

3.10.2

•


•


•


Pressure Monitoring The positions of the dampers on K-1780A/B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will not start or will stop if already running. 17-PDI-869 and 17-PDI-870 monitor the differential pressure across the inlet filter on K-1780A and K-1780B respectively. If the differential pressure reaches 300Pa, an alarm is generated at LCP-1778 and a common fault at the DCS is initiated.

3.10.3

Motor Monitoring Running, stopped, tripped and available status displays for Fan Motors KM-1780A and KM-1780B are displayed on LCP-1778. All motor faults are monitored by the MCC.

3.10.4

Maintenance Either fan can be taken out of service at the LCP/MCC. Instrument Tag Number

Low Low Trip

Low Alarm

High Alarm

High High Trip


Refer to current Process Alarm and Trip Schedule Document Number BON-AME-3GN-B-60090-007-A01 for alarm, trip and controller settings 17-PDSH-869

X

17-PDSH-870

X Table 3.38 – Cofferdam Alarms and Trips


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3.10.5

Unrestricted

Local Control Panel LCP-1778 LCP-1778 contains the following control and display functions for Cofferdam Extract Fans K-1780A/B:

3.11

•

Available, running, stopped status lamps

•


•


Port Process Module Water Lab HVAC Control Local Control Panel LCP-1776 controls the following: •


•



Supply Fan Control The supply fans can be started at Local Control Panel LCP-1776 or from the DCS. Control selection is made via a local manual/remote auto selector switch on LCP-1776. When auto is selected, Supply Fan A-1774A-K-01 or A-1774B-K-01 should be selected for duty via the selector switch on LCP-1776. When manual is selected, either supply fan can be started via the appropriate local start pushbutton. On manual, the fan selector switch is not active. An interlock prevents both fans running simultaneously. Manual Control The following description assumes that both fans are available and that A-1774A-K-01 is to be started. When A-1774A-K-01 pushbutton is operated, the control system checks that the fan is available from the MCC before opening the associated dampers. Shut-off Dampers HDS-1794A/B and HDS-1777 are controlled from the ESS. The open/closed status signals confirming damper position are repeated on LCP-1776. Only dampers HDS-1796A and B are controlled from LCP-1776. When the outlet dampers are confirmed open, A-1774A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows: •


•



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•


•


Note: If A-1774A-KM-01 is running and the stop pushbutton is operated, A-1774A-K-01 will stop. However, because A-1774B-K-01 is in standby mode, this fan will automatically start. Auto Control The following description assumes that both fans are available and that A-1774A-K-01 is to be started, with A-1774B-K-01 in standby. When auto is selected and the start signal is received from the DCS, the control system checks that A-1774A-K-01 is available from the MCC before opening the outlet dampers associated with the respective air handling unit. Shut-off Dampers HDS-1794A/B and HDS-1777 are controlled from the ESS. The shut-off dampers status signals confirming open/closed position are repeated on LCP-1776. Only dampers HDS-1796A/B are controlled from LCP-1776. When the outlet dampers are confirmed open, A-1774A-K-01 is started from the MCC. The temperature of the air exiting the AHU is constantly monitored and the control system derives set points from this temperature. These set points are used to start, stop and control the respective chiller unit. Fire thermostats in each air handling unit are used to initiate shutdown, indication, alarms and changeover to standby. The system is shut down as follows:

3.11.2

•


•


•


Pressure Monitoring Pressure Differential Indicator 17-PDI-850 monitors the room pressure. A time delay is incorporated into the control system to allow the fan to pressurise the room. In the event of loss of room pressure, an alarm is generated at LCP-1776 via PDAL-790 and a common fault signal transmitted to the DCS. Pressure Differential Switch 17-PDSL-852 monitors the differential pressure across the supply fans. In the event of a pressure loss, a local alarm and a common fault signal to the DCS are generated and an AHU changeover initiated. The positions of the dampers on AHU A-1774A and A-1774B are monitored. If a damper is not fully open when required, a common fault signal is initiated and the affected fan will change over to standby. Pressure Differential Indicator 17-PDI-851 monitors the differential pressure across the filter and if the differential pressure reaches 300Pa, an alarm is generated at LCP-1776 and a common fault at the DCS is initiated.


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3.11.3

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Temperature Monitoring Air inlet temperature to the supply fan is monitored by Temperature Switch 17-TSH-863 which generates a high temperature alarm at LCP-1776 and a common fault alarm at the DCS. Temperature Switch 17-TS-853 monitors the temperature of the air leaving the AHU. This temperature is used to control the chiller solenoid valves. HP/LP switches are used to start/stop the chiller compressor and an HP control switch controls the condenser fan motor.

3.11.4


3.11.5

Refrigeration Control The following description refers to A-1774A Refrigeration Skid. The relevant tag numbers for A-1774A/B are detailed in Table 3.39. Pressure Gauges 17-PG-931A/B monitor the following parameters on Refrigerant Compressor A-1774-K-02: •

17-PG-931A Refrigeration HP Pressure

•

17-PG-931B Refrigeration LP Pressure



•


•


•



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Instrument

A-1774A

A-1774B


17-PG-931A

17-PG-937A


17-PG-931B

17-PG-937B


17-PSL-929

17-PSL-935


17-PSL-930

17-PSL-936


17-PSH-930

17-PSH-936


17-PSH-928

17-PSH-934



Low Low Trip

Low Alarm

High Alarm

High High Trip



X X

17-TS-853

X

17-PDSH-851

X

17-TSH-863

X

17-PSH-930

X

17-PSH-928

X

17-PSL-930

X

17-PSL-929

X

X

Table 3.40 – Port Process Module Water Lab Alarms and Trips


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3.11.7

Unrestricted

Local Control Panel LCP-1776 LCP-1773 contains the following control and display functions for port process module water lab A-1774A/B: •


•


•


•


•


•


•


•


•

Lamp test


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PART 2 OPERATING PROCEDURES Section 1

System Operating Procedures.

Section 2

Equipment Operating Procedures.

Section 3

Supplementary Operating Procedures..

Part 2 Operating Procedures

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Part 2 Operating Procedures. Section 1 System Operating Procedures.. Procedure Number HULL HVAC SYSTEM OPERATING PROCEDURES PROCEDURE NO 1/001:

START-UP OF THE FORWARD SPACE HVAC SYSTEM

PROCEDURE NO 1/002:

START-UP OF THE MACHINERY SPACE HVAC SYSTEM

PROCEDURE NO 1/003:

START-UP OF THE QUARTERS HVAC SYSTEM

TOPSIDES HVAC SYSTEM OPERATING PROCEDURES PROCEDURE NO 1/004:

START-UP OF THE POWER MODULE MAIN SWITCHROOM HVAC SYSTEM

PROCEDURE NO 1/005:

START-UP OF THE POWER MODULE BATTERY ROOM HVAC SYSTEM

PROCEDURE NO 1/006:

START-UP OF THE STARBOARD SUBSEA MODULE AUXILIARY SWITCHROOM HVAC SYSTEM

PROCEDURE NO 1/007:

START-UP OF THE STARBOARD SUBSEA MODULE BATTERY ROOM HVAC SYSTEM

PROCEDURE NO 1/008:

START-UP OF THE COMPRESSOR CONTROL MODULE HVAC SYSTEM

PROCEDURE NO 1/009:

START-UP OF THE COMPRESSOR CONTROL MODULE BATTERY ROOM HVAC SYSTEM

PROCEDURE NO 1/010:

START-UP OF THE COFFERDAM EXTRACT SYSTEM

PROCEDURE NO 1/011:

START-UP OF THE PORT PROCESS MODULE WATER LAB HVAC SYSTEM

PROCEDURE NO 1/012:

START-UP OF THE TURBINE GENERATOR EXTRACT SYSTEM

Part 2 Section 1 System Operating Procedures

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HULL HVAC SYSTEM

PROCEDURE NO 1/001: START-UP OF THE FORWARD SPACE HVAC SYSTEM

THE WHOLE OF THIS PROCEDURE MUST BE READ THROUGH AND FULLY UNDERSTOOD BEFORE CARRYING OUT ANY OF THE FOLLOWING ACTIONS.

INTRODUCTION This procedure details the operator actions required to start up the Forward HVAC System.

PRECONDITIONS Supporting Drawings •

•

SAMSUNG Drawings −

80471-MSL-1 HVAC Single Line Diagram Upper Deck Forward

−

80471-MSL-12 HVAC Single Line Diagram Forecastle

BON/1SA1379/HIPRES/000001 M/Space Fans and Dampers

Pre-requisites •

No work permits are in force which will prohibit any part of this procedure

•

The ESS, Fire and Gas Detection/Protection Systems and DCS are operational along with the alarms, trips and controllers

•

All drains, vents, and sample point valves are closed and blanked where necessary

•

All instrument isolation valves are open

•

Check belt tension for all belt-driven equipment

•

Bump start equipment motors to verify proper rotation

•

Verify that any weather intakes or discharges are clear, and if any covers are provided they are in the open position

•

Verify that air filters are installed and clean for all applicable systems

•

Confirm all equipment isolation dampers are in the closed position

•

Confirm all pressure control dampers and non-return gravity-type counterweighted dampers are capable of moving freely

•

Verify all duct access covers are mounted to the ducts and are closed


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PRESTART CHECKS AND CONDITIONS Step

Action

1

CONFIRM that there are no indications of smoke or gas via the Fire and Gas Detection Systems and, if necessary, GAS TEST all forward areas.

2

CONFIRM that all fire dampers are open.

WHERE FIRE DAMPERS ARE FOUND TO BE OUT OF POSITION, THE OPERATOR SHOULD SATISFY HIMSELF THAT IT IS SAFE TO RESET THE DAMPERS BEFORE DOING SO.

3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way.

4

Ensure that personnel are aware of the special safety considerations, as shown in the caution below.

THE FORWARD SPACE HVAC SYSTEM INCLUDES HIGH SPEED, ROTATING MACHINERY THEREFORE CARE MUST BE EXERCISED WHEN WORKING IN THE VICINITY OF THE SUPPLY AND EXHAUST FANS.

5

CHECK the compressor crankcase lubricating oil level via the lubricating oil sight glass compressor. TOP-UP with the correct grade of oil if necessary.


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PROCEDURE Step

Action

1

Ensure electrical power is restored to the Local Control Panel CP-1707 located in the forward store, which is used to start up the forward space fans.

2

INFORM the control room to make an announcement informing all personnel to take care opening and closing doors whilst the forward space fan is being started up.

3

At the Local Control Panel CP-1707 located in the forward store. ENSURE local/remote selector is in remote.

4

VERIFY that the duty equipment isolation dampers have opened.

5

At the DCS, ACTIVATE remote start/stop 17-YZC-224 to start forward supply fan K-1722.

6

At the DCS, ACTIVATE remote start/stop 17-YZC-223 to start Deck Store Exhaust Fan K-1721.

7

At the package air conditioning, A-1713, local control panel in the forward store, START forward space package air conditioning.

8

ENSURE that the forward HVAC systems are maintaining the necessary pressurisation requirement.


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HULL HVAC SYSTEM

PROCEDURE NO 1/002: START-UP OF THE MACHINERY SPACE HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the Machinery Spaces HVAC System. Normally one pair of supply fans, K-1731A/B or K-1732A/B, will be run at a time. When all mechanical ventilation fans are running, Air Handling Unit A-1704 can be started.


SAMSUNG Drawing 80471-MSL-03 HVAC Single Line Diagram 2nd Deck Aft

•

BON/1SA1379/HIPRES/000001 M/Space Fans and Dampers

Pre-requisites •

No work permits are in force that will prohibit any part of this procedure

•


•


•


•


•


•

Verify any weather intakes or discharges are clear and if any covers are provided they are in the opened position

•

Verify air filters are installed and clean for applicable systems

•


•


•


•

Ensure that the instrument air system is operating

•

Ensure that the cooling water system is operating


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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all machinery spaces.

2


WHEN FIRE DAMPERS ARE FOUND TO BE OUT OF POSITION, THE OPERATOR SHOULD SATISFY HIMSELF THAT IT IS SAFE TO RESET THE DAMPERS BEFORE DOING SO.

3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way whatsoever.

4


THE MACHINERY SPACES HVAC SYSTEM INCLUDES HIGH SPEED, ROTATING MACHINERY THEREFORE CARE MUST BE EXERCISED WHEN WORKING IN THE VICINITY OF THE SUPPLY AND EXTRACT FANS.

5

Electrical power is available to operate the machinery space supply and exhaust fans, which are normally operated from the DCS.

6



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PROCEDURE Step

Action

1

ENSURE electrical power is established to the firepump LCP, which is used to operate the Aft Firepump Supply Fan K-1733A/B, K-1733C/D and the LCP for the toilet exhaust fan.

2

INFORM the control room to make an announcement informing all personnel to take care opening/closing doors whilst the Machinery Spaces HVAC System is being started up.

3


4

VERIFY the duty equipment isolation dampers have opened.

5

At the DCS, ACTIVATE remote start/stop 17-YZC-261/262 or 17-YZC-263A/263B to START Machinery Space Supply Fans K-1731A/B or K-1732A/B. Allow the machinery space supply fan to run up to the normal speed before starting the firepump supply fan.

6

At the DCS, ACTIVATE remote start/stop 17-YZC-265 or 17-YZC-266 and 17-YZC-267 or 17-YZC-268 to START Aft Firepump Supply Fans K-1733A or B and K-1733C or D. Allow the firepump supply fans to run up to the normal speed before starting the purifier exhaust fan.

7

At the DCS, ACTIVATE remote start/stop 17-YZC-269 to START Purifier Exhaust Fan K-1736. Allow the purifier exhaust fan to run up to the normal speed before starting the foam/mist room supply and exhaust fans.

8

At the DCS, ACTIVATE remote start/stop 17-YZC-267 and 17-YZC-268 to START Foam/Mist Room Supply Fan K-1719 and Exhaust Fan K-1720. Start the supply fan first.

9

At the HVAC System Unit Control Panel UCP-1701, SELECT remote mode. At the DCS, ENSURE HVAC is enabled (17-HCH-002) and ACTIVATE remote start 17-HCH-058 to start machinery space AHU A-1704. Refer to Part 2 Section 2 Procedure No 2/001.

10

At the DCS, ACTIVATE remote start/stop 17-YZC-270 or 17-YZC-271 to START IGG Supply Fan K-1718A or K-1718B.

11

At the DCS, ACTIVATE remote start/stop 17-YZC-276 to START the duty emergency generator room supply fan.

12

ENSURE that the exhaust fan runs up to speed and Fan Run Indicator 17-YZ-276A or 17-YZ-277 illuminates at the DCS.


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HVAC SYSTEM

PROCEDURE NO 1/003: START-UP OF THE QUARTERS HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the Quarters HVAC System.


SAMSUNG Drawing 80471-MSL-05 HVAC Single Line Diagrams A Deck Aft

•

BON/1MA1792/DIRECT/000002: Central Unit for Air Conditioner

Pre-requisites •


•


•


•


•


•


•


•


•


•


•


•

Ensure that the instrument air system is operating

•

Ensure that the cooling water system is operating

•

Ensure that the chilled water system is operating

•

Ensure that the power generation system is operating


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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems.

2



3


4



5

Electrical power is available to operate the main HVAC supply and exhaust fans, which are normally operated from the DCS.

6



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PROCEDURE Step

Action

1

ENSURE electrical power is established to the HVAC System control panel in the air handling room.

2

ENSURE electrical power is available to operate the main HVAC System supply and exhaust fans, which are normally operated from the HVAC System control panel or DCS.

3

ENSURE electrical power is available to operate the crew cabin reheaters.

4

ENSURE that the Chilled Water and Fresh Cooling Water Systems are in service. This allows chilled water to pass through or bypass the AHUs to maintain the desired temperature and humidity of the air supply. Refer to Part 2 Section 2 Procedure No 2/002 for details.

5

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all areas.

6

CONFIRM that all fire dampers are open. Where dampers are found to be out of position, the operator should be satisfied that it is safe to reset the dampers before doing so.

7

INFORM the control room to make an announcement informing all personnel to take care opening and closing doors whilst the main HVAC System is being started up.

8


9

At HVAC System Unit Control Panel CP-1701, SELECT remote operation.

10

At the DCS, select AHU A-1702A or B as duty at 17-HS-051/054. ACTIVATE remote start 17-HCH-002. Refer to Part 2 Section 2 Procedure No 2/001.

11

At the DCS, SELECT sanitary Exhaust Fans K-1715A or K-1715B to DUTY and the alternative fan available as STANDBY.

12

At the DCS, ACTIVATE remote start/stop 17-HCH-012 to START the smoking coffee shop Extract Fan K-1706. ENSURE that the extract fan runs up to speed and that fan run indicator 17-YZ-221 illuminates at the DCS.

13

At the DCS, SELECT laundry Supply Fan K-1707A or K-1707B to DUTY and the alternative fan available as STANDBY.

14

At the DCS, ACTIVATE remote start/stop 17-HCH-026 to START the duty laundry supply fan. ENSURE that the supply fan runs up to speed and that Fan Run Indicator 17-YZ-207 or 17-YZ-208 illuminates at the DCS.

15

At the DCS, SELECT laundry Exhaust Fan K-1708A or K-1708B to DUTY and the alternative fan available as STANDBY.

16

At the DCS, ACTIVATE remote start/stop 17-HCH-013 to START the duty laundry extract fan. ENSURE that the extract fan runs up to speed and that Fan Run Indicator 17-YZ-209 or 17-YZ-210 illuminates at the DCS.

17

At the DCS, SELECT galley Supply Fan K-1712A or K-1712B on C Deck to DUTY and the alternative fan available as STANDBY.


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Step

Action

18

START the duty galley supply fan. ENSURE that the supply fan runs up to speed and that either Fan Run Indicator 17-YZ-202A or 17-YZ-202B illuminates at the DCS.

19

At the DCS, SELECT galley Exhaust Fan K-1713A or K-1713B to DUTY and the alternative fan available as STANDBY.

20

START the duty galley extract fan. ENSURE that the extract fan runs up to speed and that either Fan Run Indicator 17-YZ-204A or 17-YZ-204B illuminates at the DCS.

21

The HVAC System for the galley on C Deck is now in service. When all the HVAC System fans are running, the gym and smoking room exhaust fans can be started as required.

22

CONFIRM that all cooling units for the cabins on D and E Decks are working correctly. CHECK the operation of the controllers and thermostats.

23

At the DCS, SELECT gymnasium Exhaust Fan K-1711.

24

At the DCS, ACTIVATE remote start/stop 17-HCH-016 to START the gymnasium exhaust fan. ENSURE that the extract fan runs up to speed and that Fan Run Indicator 17-YZ-217 illuminates at the DCS.

25

At the DCS, SELECT smoking room Exhaust Fan K-1717.

26

At the DCS, ACTIVATE remote start/stop 17-HCH-015 to START the smoking room exhaust fan. ENSURE that the extract fan runs up to speed and that Fan Run Indicator 17-YZ-218 illuminates at the DCS.

27

At the DCS, SELECT the hospital room Exhaust Fan K-1714A or K-1714B to DUTY and the alternative fan available as STANDBY.

28

At the DCS, ACTIVATE remote start/stop 17-HCH-018 to START the duty hospital room exhaust fans. ENSURE that the extract fan runs up to speed and that fan run indicator 17-YZ-219 or 17-YZ-220 illuminates at the DCS.

29

At the DCS, ACTIVATE remote start/stop 17-HCH-019 to START duty sanitary exhaust fans. ENSURE that the extract fan runs up to speed and that either Fan Run Indicator 17-YZ-205 or 17-YZ-206 illuminates at the DCS.

30

At the DCS, SELECT either battery room Exhaust Fan K-1709A or K-1709B to DUTY and the alternative fan available as STANDBY.

31

At the DCS, ACTIVATE remote start/stop 17-HCH-021 to START the duty battery room exhaust fan. ENSURE that the exhaust fan runs up to speed and that either Fan Run Indicator 17-YZ-211 or 17-YZ-212 illuminates at the DCS.

32

At the DCS, SELECT lift motor space Exhaust Fan K-1716.

33

At the DCS, ACTIVATE remote start/stop 17-HCH-020 to START the duty lift motor space exhaust fan. ENSURE that the exhaust fan runs up to speed and that either Fan Run Indicator 17-YZ-XI-691 or 17-YZ-222 illuminates at the DCS.


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Step

Action

34

At the DCS, ACTIVATE remote start/stop 17-YZC-215/216 to START cofferdam Exhaust Fans K-1703A or B. Note: These fans do not operate continuously; they are started on an as required basis.

35

The HVAC System for the accommodation is now in service.

36

At the HVAC System control panel for AHU A-1703 CCR, CER, DTR and UPS, SELECT supply fan.

37

PRESS the start button for the CCR and CER AHU A-1703 supply fan and ensure the fan runs up to speed. ENSURE that the fan run indicator illuminates at the DCS.

38

If necessary, ADJUST the manually operated volume control damper or bypass damper to control the inlet airflow to the AHU.

39

At the DCS, SELECT the battery room Exhaust Fans K-1710A.

40

At the DCS, SELECT the paint store Supply Fan K-1702.

41

At the DCS, ACTIVATE remote start/stop 17-YZC-275 to START the paint store supply fan. ENSURE that the supply fan runs up to speed and that Fan Run Indicator 17-YZ-275A illuminates at the DCS.

42

At the DCS, SELECT the hazardous chemical store Supply Fan K-1701.

43

At the DCS, ACTIVATE remote start/stop 17-YZC-274 to START the hazardous chemical store supply fan. ENSURE that the supply fan runs and that Fan Run Indicator 17-YZ-274A illuminates at the DCS.


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TOPSIDES HVAC SYSTEM

PROCEDURE NO 1/004: START-UP OF THE POWER MODULE MAIN SWITCHROOM HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the power module main switchroom HVAC System and the operations required to start A-1770A as duty with A-1770B as standby.

PRECONDITIONS Supporting Drawings The power module HVAC System utilises the following P&IDs •

BON-AME-3PW-H-20117-001 Power Module Main Switchroom

•

NSV P&ID 6540-PW-PID-001 Refrigeration P&ID for AHU A-1770A/B

Pre-requisites •


•


•


•


•


•


•


•


•


•


•



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Ensure that the Instrument and Utility Air System is operating. Refer to POPM Volume 25 (OPRM-2003-0325)

•

Ensure that the Power Generation and Distribution Systems are operating. Refer to POPM Volume 30 (OPRM-2003-0330)


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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all power module main switchroom spaces.

2



3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way. Note: Any door found not closing and sealing correctly should be reported to the Maintenance Department.

4



5

Electrical power is available to operate the supply fans, condenser fans and refrigerant compressors.

6



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PROCEDURE Step

Action

1

CHECK the lube oil level in the compressor crankcase.

2


3

ENSURE electrical power is available for LCP-1770 in the power module main switchroom.

4

ENERGISE the main power isolator on LCP-1770. Note: The unit should be left powered up for 2 to 3 hours prior to being put in operation. This allows the compressor crankcase heaters to warm up the compressors.

5

SELECT manual/suto selector switch 17-HS-HOLD to manual.

6

REMOVE the brass caps on the service valves on Refrigerant Compressor A1770A-K-02, connect suitable pressure gauges and put in service.

7

ENSURE that the suction and discharge valves on Refrigerant Compressor A1770A-K-02 are fully open.

8

PRESS start Pushbutton 17-HS-705A.

9

MONITOR the thermostat setting.

10

ADJUST the thermostat until the refrigerant compressor starts running.

11

ALLOW the compressor to run for approximately 15 minutes.

12

MONITOR the suction and discharge pressures. Note: The suction and discharge pressures should be 55/65psig and 195/240psig respectively.

13

MONITOR the refrigerant sight glass to ensure that the liquid is free from bubbles. Note: If the sight glass is showing bubbles or the pressures are not within the range detailed in Step 12, this indicates that the system has lost the refrigerant charge. The system should be charged with refrigerant, as detailed in Part 2 Section 2 Procedure No 2/004.

14

STOP A-1770A via 17-HS-705B.

15

REMOVE the suction and discharge pressure gauges and REPLACE the brass caps.

16

REMOVE the brass caps on the service valves on Refrigerant Compressor A1770B-K-02, connect suitable pressure gauges and put in service.

17

ENSURE that the suction and discharge valves on Refrigerant Compressor A1770B-K-02 are fully open.

18


19


20


21



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Step

Action

22


23

MONITOR the refrigerant sight glass to ensure that the liquid is free from bubbles. Note: If the sight glass is showing bubbles or the pressures are not within the range detailed in Step 22, this indicates that the system has lost the refrigerant charge.

24

STOP A-1770B via 17-HS-709B.

25


26

SELECT A-1770A as duty and A-1770B as standby via duty/standby selector 17-HS-HOLD.

27

SELECT manual/auto selector switch 17-HS-HOLD to auto.

28

PRESS start pushbutton 17-HS-705A. The unit will run automatically and be controlled by the room thermostat.

29

MONITOR the system operation.


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PROCEDURE NO 1/005: START-UP OF THE POWER MODULE BATTERY ROOM HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the power module battery room HVAC System and the operations required to start A-1775A as duty with A-1775B as standby.

PRECONDITIONS Supporting Drawings The power module HVAC System utilises the following P&IDs: •

BON-AME-3PW-H-20117-006 Power Module Battery Room

•

NSV P&ID 6540-PW-PID-002 Refrigeration P&ID for AHU A-1775A/B

Pre-requisites •


•


•


•


•


•


•


•


•


•


•



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•



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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all power module battery room spaces.

2



3


4



5


6



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1771 in the power module battery room.

2

ENERGISE the main power isolator on LCP-1771. Note: The unit should be left powered up for 2 to 3 hours prior to being put in to operation. This allows the compressor crankcase heaters time to warm up the compressors.

3

SELECT manual/auto selector switch 17-HS-HOLD to manual.

4


5

REMOVE the brass caps on the service valves on Refrigerant Compressor A1775A-K-02 and connect suitable pressure gauges and put in service.

6


7


8

CHECK the rotation direction of the supply and condenser fans.

9


10


11


12


13

MONITOR the refrigerant sight glass to ensure that the liquid is free from bubbles. Note: If the sight glass is showing bubbles or the pressures are not within the range detailed in Step 12, this indicates that the system has lost the refrigerant charge. The system should be charged with refrigerant as detailed in Part 2 Section 2 Procedure No 2/004.

14


15


16

REMOVE the brass caps on the service valves on Refrigerant Compressor A1775B-K-02, connect suitable pressure gauges and put in service.

17


18


19


20


21



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Step

Action

22


23


24


25


26


27


28

SELECT manual/auto selector switch 17-HS-HOLD to auto.

29

PRESS start Pushbutton 17-HS-814A. The unit will run automatically and be controlled by the room thermostat.

30



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PROCEDURE NO 1/006: START-UP OF THE STARBOARD SUBSEA MODULE AUXILIARY SWITCHROOM HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the starboard subsea module auxiliary switchroom HVAC System and the operations required to start A-1771A as duty with A-1771B as standby.

PRECONDITIONS Supporting Drawings The starboard subsea module auxiliary switchroom HVAC System utilises the following P&IDs: •

BON-AME-3SS-H-20117-003 Starboard Subsea Module Auxiliary Switchroom

•

NSV P&ID 6540-SS-PID-001 Refrigeration P&ID for AHU A-1771A/B

Pre-requisites •


•


•


•


•


•


•


•


•


•


•



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•



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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all starboard subsea module auxiliary switchroom spaces.

2

CONFIRM that all fire dampers are open. Where fire dampers are found to be out of position, the operator should be satisfied that it is safe to reset the dampers before doing so.

WHERE FIRE DAMPERS ARE FOUND TO BE OUT OF POSITION, THE OPERATOR SHOULD SATISFY HIMSELF THAT IT IS SAFE TO RESET THE DAMPERS BEFORE DOING SO.

3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way. Note: Any door found not closing and sealing correctly should be reported to the Maintenance Department.

THE STARBOARD SUBSEA MODULE AUXILIARY SWITCHROOM SYSTEM INCLUDES HIGH SPEED, ROTATING MACHINERY THEREFORE CARE MUST BE EXERCISED WHEN WORKING IN THE VICINITY OF THE SUPPLY AND EXHAUST FANS.

4


5



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1772 in the starboard subsea module auxiliary switchroom.

2

ENERGISE the main power isolator on LCP-1772. Note: The unit should be left powered up for 2 to 3 hours prior to being put in to operation. This allows the compressor crankcase heaters to warm up the compressors.

3


4


5


6


7


8


9


10


11


12


13


14


15


16

REMOVE the brass caps on the service valves on Refrigerant Compressor A1771B-K-02 and connect suitable pressure gauges and put in service.

17


18


19


20


21



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Step

Action

22


23


24


25


26


27


28

SELECT Manual/Auto Selector Switch 17-HS-HOLD to auto.

29


30



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PROCEDURE NO 1/007: START-UP OF THE STARBOARD SUBSEA MODULE BATTERY ROOM HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the starboard subsea module battery room HVAC System and the operations required to start A-1776A as duty with A-1776B as standby.

PRECONDITIONS Supporting Drawings The starboard subsea module starboard subsea module battery room HVAC System utilises the following P&IDs: •

BON-AME-3SS-H-20117-007 Starboard Subsea Module Battery Room

•

NSV P&ID 6540-SS-PID-002 Refrigeration P&ID for AHU A-1776A/B

Pre-requisites •


•


•


•


•


•


•


•


•


•


•



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•



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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all starboard subsea module battery room spaces.

2



3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way. Note: Any door found to not be closing and sealing correctly should be reported to the Maintenance Department.

4



5


6



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1773 in the starboard subsea module battery room.

2


3

SELECT Manual/Auto Selector Switch 17-HS-HOLD to manual.

4


5


6


7


8


9


10


11


12

MONITOR the suction and discharge pressures. Note: The suction and discharge pressures are 3.7/4.4barg and 13.3/16.3barg respectively.

13


14


15

REMOVE the suction and discharge pressure gauges, and REPLACE the brass caps.

16


17


18


19


20


21



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Step

Action

22


23


24


25


26


27


28


29


30



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PROCEDURE NO 1/008: START-UP OF THE COMPRESSOR CONTROL MODULE HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the compressor control module HVAC System and the operations required to start A-1772A as duty with A-1772B as standby.

PRECONDITIONS Supporting Drawings The compressor control module HVAC System utilises the following P&IDs: •

BON-AME-3CC-H-20117-004 Compressor Control Module

•

NSV P&ID 6540-CC-PID-001 Refrigeration P&ID for AHU A-1772A/B

Pre-requisites •


•


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Action

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CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all compressor control module spaces.

2



3

ENSURE that all associated module doors are correctly closed and that they are not obstructed or prevented from closing in any way. Note: Any door that is not closing and sealing correctly should be reported to the Maintenance Department.

4



5


6



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1774 in the compressor control module.

2


3


4

Verify the duty equipment isolation dampers have opened.

5


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17


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PROCEDURE NO 1/009: START-UP OF THE COMPRESSOR CONTROL MODULE BATTERY ROOM HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the compressor control module battery room HVAC System and the operations required to start A-1777A as duty with A-1777B as standby.

PRECONDITIONS Supporting Drawings The compressor control module battery room HVAC System utilises the following P&IDs: •

BON-AME-3CC-H-20117-005 Compressor Control Module Battery Room

•

NSV P&ID 6540-CC-PID-002 Refrigeration P&ID for AHU A-1777A/B

Pre-requisites •


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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all compressor control module battery toom spaces.

2



3


4



5


6



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1775 in the compressor control module battery room.

2


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PROCEDURE NO 1/010: START-UP OF THE COFFERDAM EXTRACT SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the Cofferdam Extract System and the operations required to start K1708A and K1708B as duty fans.

PRECONDITIONS Supporting Drawings The Cofferdam Extract System utilises the following P&ID: •

BON-AME-3GN-H-20117-009 Cofferdam Area Main Deck

Pre-requisites •


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Action

1


2



3

Electrical power is available to operate the extract fans.

4

CHECK the fan lubricating oil level via the lubricating oil sight glass compressor. TOP-UP with the correct grade of oil if necessary.


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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1778 in the compressor control module.

2

ENERGISE the main power isolator on LCP-1778.

3

START chemical tank area Extract Fan K-1780A via 17-HS-871.

4


5

START methanol tank area Extract Fan K-1780B via 17-HS-872.

6



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PROCEDURE NO 1/011: START-UP OF THE PORT PROCESS MODULE WATER LAB HVAC SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the port process module water lab HVAC System and the operations required to start A-1774A as duty with A-1774B as standby.

PRECONDITIONS Supporting Drawings The port process module water lab HVAC System utilises the following P&IDs: •

BON-AME-3PP-H-20117-008 Port Process Module Water Lab

•

NSV P&ID 6540-PP-PID-002 Refrigeration P&ID for AHU A-1774A/B

Pre-requisites •


•


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OPRM-2003-0332

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Action

1

CONFIRM that there are no indications of smoke or gas via the fire and gas detection systems and, if necessary, GAS TEST all port process module water lab spaces.

2



3


4



5


6



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PROCEDURE Step

Action

1

ENSURE electrical power is available for LCP-1776 in the port process module water lab.

2

ENERGISE the main power isolator on LCP-1776. Note: The unit should be left powered up for 2 to 3 hours prior to being put in to operation. This allows the compressor crankcase heaters to warm up the compressors

3

SELECT Manual/Auto Selector Switch 17-HS-HOLD to manual.

4


5

REMOVE the brass caps on the service valves on Refrigerant Compressor A-1774A-K-02 and connect suitable pressure gauges and put in service.

6

ENSURE that the suction and discharge valves on Refrigerant Compressor A-1774A-K-02 are fully open.

7


8


9


10


11


12


13


14


15


16

REMOVE the brass caps on the service valves on Refrigerant Compressor A-1774A-K-02 and connect suitable pressure gauges and put in service.

17

ENSURE that the suction and discharge valves on Refrigerant Compressor A-1774A-K-02 are fully open.

18


19


20


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PROCEDURE NO 1/012: START-UP OF THE TURBINE GENERATOR EXTRACT SYSTEM


INTRODUCTION This procedure details the operator actions required to start up the turbine generator extract system on G-7040A. The procedure for the remaining turbine generators is identical. This procedure assumes that G-7040A is to be started following a power shutdown and that the Hull Generation System is on line and that the appropriate switchboards are energised. For details of the Power Generation and Distribution Systems, refer to POPM Volume 30 (OPRM-2003-0330).

PRECONDITIONS Supporting Drawings The Turbine Generator Extract System utilises the following P&ID: •

BON-AME-3PW-H-20117-002 Power Module Turbine Generator Rooms

Pre-requisites •


•


•


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Action

1

ENSURE that all enclosure doors are correctly closed and that they are not obstructed or prevented from closing in any way.

2



3

Electrical power is available to operate the extract fans.

4

CHECK the fan lubricating oil level via the lubricating oil sight glass compressor. TOP-UP with the correct grade of oil if necessary.


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PROCEDURE Step

Action

1

ENSURE that the extract fans are energised. Note: For details of Power Generation and Distribution Systems, refer to POPM Volume 30 Power Generation and Distribution Systems (OPRM-2003-0330).

2

ENERGISE the main power isolator on LCP-1777 in the main power switchroom.

3

ENSURE that available status lamps, 17-XL-732A and 17-XL-733A for K-1776A and B respectively are illuminated.

4

SET Duty/Standby Selector 17-HS-HOLD to K-1776A as duty with K-1776B as standby.

5

SET Manual/Auto Selector Switch 17-HS-HOLD to auto.

6

START K1776A via Selector Switch 17-HS-732A.

7

MONITOR the differential pressure on the air inlet filter via Differential Pressure Switch 17-PDI-722.

8

CONTINUE with G-7040A start-up as detailed in POPM Volume 30 Power Generation and Distribution Systems (OPRM-2003-0330) Part 2 Section 1 Procedure No 1/001.

9

ENSURE that K-1776B starts if the exhaust temperature rises to 38°C, as indicated by 17-TT-863.


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Part 2 Operating Procedures. Section 2 Equipment Operating Procedures.. Procedure Number HULL HVAC EQUIPMENT OPERATING PROCEDURES PROCEDURE NO 2/001:

OPERATION OF AIR HANDLING UNITS (AHUS)

PROCEDURE NO 2/002:

OPERATION OF CHILLED WATER SYSTEM

PROCEDURE NO 2/003:

RESETTING THE FIRE DAMPERS

Part 2 Section 2 Equipment Operating Procedures

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HULL HVAC SYSTEM

PROCEDURE NO 2/001: OPERATION OF AIR HANDLING UNITS (AHUs)


INTRODUCTION This procedure details the operator actions required for normal operation of the AHUs provided for the Main HVAC System. The procedure describes local and remote start operations. Under DCS control, automatic sequenced operation of the AHUs, dampers and chiller units takes place.


SAMSUNG Drawing 80471-MSL-05 HVAC Single Line Diagram A Deck Aft

Interface Systems •


Pre-requisites •

No work permits in force which will prohibit any part of this procedure

•

The ESS, Fire and Gas Detection/Protection Systems and DCS are operational along with alarms, trips and controllers


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Action

1

The HVAC System control panel in the air handling room is fully operational.

2

The standby AHU is not in service.

3

All fire dampers associated with the HVAC System have been reset to the open position.

4

The panel filters are correctly installed in the AHU.

5

The integral centrifugal air supply fan for the AHU is available for operation.


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PROCEDURE Step

Action

Local Start 1

If required, RESET the fresh air inlet damper, air supply damper and return dampers for the AHU to the open position. If the AHU is to be run in recirculation mode, the fresh air damper must remain closed. The systems are capable of running on full recirculation for at least 1 hour. Under full recirculation, all supply and exhaust ventilation systems stop.

2

At the HVAC System control panel, SELECT the HVAC System to LOCAL control. In this mode of operation the HVAC System is started and stopped from the local control panel, duty and standby supply fans are started and stopped, set points adjusted etc.

3

SELECT one of the AHU supply fans to DUTY and the alternative fan to STANDBY.

4

PRESS the start button for the AHU supply fan selected for duty and ENSURE that it runs up to speed. ENSURE that the fan run indication lamp illuminates at the DCS.

5

Once the AHU supply fan is up to speed, ENSURE that the vibration and sound levels of the fan are normal.

6

The Chilled Water System can now be started up as described in Procedure No 2/002.

Auto Start from CCR via HVAC UCP (CP-1701) 7

CONFIRM/SELECT ‘HVAC SYSTEM ENABLED’ 17-XI-001 on the DCS panel.

8

CONFIRM/SELECT ‘REMOTE’ 17-HS-001B on the DCS panel.

9

SELECT ‘START’ 17-HCH-001 on the DCS panel. Note:

Remote operation of the accommodation HVAC and chillers from the DCS is fully described Part 1 Section 2 Paragraph 3.6.4.


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MAIN HVAC SYSTEM

PROCEDURE NO 2/002: OPERATION OF CHILLED WATER SYSTEM


INTRODUCTION This procedure details the operator actions required for normal operation of the Chilled Water System provided for the Main HVAC System AHUs. Remote operation of the combined start of the chillers and accommodation HVAC from the DCS is fully described in Part 1 Section 2 Paragraph 3.6.5.


SAMSUNG Drawing 80471-MSL-02 HVAC Single Line Diagrams (3rd Deck Aft)



Pre-requisites •


•



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Action

1

At least one of the AHUs provided for the Main HVAC System is in service.

2

The HVAC System control panel in the air handling room is fully operational.

3

All fire dampers associated with the HVAC System have been reset to the open position.

4

The panel filters are correctly installed in the AHU.

5

The integral centrifugal air supply fan for the AHU is available for operation.

6

The chilled water pumps and chilled water units are available for use.

7

The shut-off valves for the chilled water supply to the AHUs have been reset to the open position.


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PROCEDURE Step

Action

1

ENSURE that there is a sufficient level of fresh water in the expansion tank. Note: The fresh water should be treated with corrosion inhibitor.

2

ENSURE that there is sufficient R407C refrigerant in the Chilled Water System.

3

CONFIRM that the flow of cooling fresh water is established through the condensers.

4

ENSURE that there is sufficient lube oil in the crankcases of the three refrigerant compressors by observing the local sight glasses. TOP-UP, if necessary, until the sight glasses are 50% full.

5

ENSURE that the refrigerant compressor crankcase heaters are operating normally.

6

At the HVAC System control panel, SELECT one of the chilled water pumps to DUTY and the alternative pump to STANDBY.

7

PRESS the start button for the chilled water pump selected for duty and ensure the pump runs up to speed. ENSURE that the pump run indication is annunciated at the DCS. Note: Chilled water is now circulating around the AHU cooling coils.

8

SET the temperature controller for the AHU to a relatively high set point. This is to avoid overloading the Chilled Water System when the refrigerant compressors come on line.

9

At the HVAC System control panel, INITIATE the start sequence for one of the Chilled Water Units A-1704A or A-1704B. Note: The chillers are self-contained units with individual millennium controllers. These controllers regulate the refrigerant compressor as well as monitoring the flow of cooling water through the condenser and chilled water through the AHU cooling coils.

10

SLOWLY ADJUST the temperature controller for the AHU to the required set point. The temperature set point is used to control the chilled water temperature control valves for each cooling unit.


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HVAC SYSTEM

PROCEDURE NO 2/003: RESETTING THE FIRE DAMPERS


INTRODUCTION This procedure details the operator actions required to open the pneumatically operated fire dampers.

PRECONDITIONS Supporting Drawings SAMSUNG Drawings •

80471-MSL-02 HVAC SLD 3rd Deck Aft

•

80471-MSL-03 HVAC SLD 2nd Deck Aft

•

80471-MSL-04 HVAC SLD Upper Deck Aft

•

80471-MSL-05 HVAC SLD A Deck Aft

•

80471-MSL-06 HVAC SLD B Deck Aft

•

80471-MSL-07 HVAC SLD C Deck Aft

•

80471-MSL-08 HVAC SLD D Deck Aft

•

80471-MSL-09 HVAC SLD E Deck Aft

•

80471-MSL-10 HVAC SLD E Deck Top Aft

•

80471-MSL-11 HVAC SLD Upper Deck Forward

•

80471-MSL-12 HVAC SLD Forecastle Deck



Pre-requisites •


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Action

1

Special safety considerations: •

The normal air supply to the fire dampers is between 6 and 8barg

2

Communications are established between the FPSO personnel involved in the procedure.

3

Any fire and gas or ESS trip signals that close the fire dampers have been reset at the DCS.


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PROCEDURE Step

Action

1

CONFIRM that there are no indications of smoke or gas at the Fire and Gas System.

2

ENSURE that all safe areas of the FPSO have been gas tested.

3

ENSURE that the instrument air supply pressure to the fire dampers is 6 to 8barg.

Resetting the Fire Dampers 4

RESET the ESS to reset the fire dampers. Manual control of each fire damper is also possible by the operation of three-way hand switches located on the front of the HVAC System control panel, which allows each damper to be opened, closed or placed in remote control.

5

MONITOR the operation of the electro-pneumatic solenoids used to open the fire dampers.

6

CONFIRM that the fire damper is indicating open at the HVAC System control panel and DCS. Each fire damper is provided with an open and closed limit switch, which are continuously monitored by the control panel and SSDS.

Completion of Fire Damper Operations 7

INVESTIGATE the fault on any fire damper that does not indicate an open position.

8

The fire dampers for the HVAC System AHU must be CONFIRMED as being open before the supply fans can be started. Each fire damper is provided with an open and closed limit switch, which are continuously monitored by the control panel and SSDS.


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Part 2 Operating Procedures. Section 3 Supplementary Operating Procedures. Procedure Number PROCEDURE NO 3/001: SMOKE REMOVAL FROM LIVING QUARTERS

Part 2 Section 3 Supplementary Operating Procedures

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HVAC SYSTEMS

PROCEDURE NO 3/001: SMOKE REMOVAL FROM LIVING QUARTERS


INTRODUCTION This is the recommended procedure for removing smoke from the living quarters after all emergencies have been cancelled and prior to occupants returning to the living quarters. The following situations need to be carried out or confirmed prior to the commencement of this procedure to remove smoke from the living quarters.


SAMSUNG Drawing 80471-MSL-01 to 012 HVAC Single Line Diagrams (Hull)

Interface systems •


Pre-requisites •


•

Instrument Air System must be on line

•

Power Generation System must be on line


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Action

1

Fire, Gas and Safety Systems are in readiness for operation with accommodation smokeheads initially inhibited to prevent further spurious shutdowns.

2

The interior of the living quarters must be free of any hazardous gas. The exterior of the living quarters, particularly in the vicinity of the fresh air intakes, must be free of any hazardous gas and smoke.


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PROCEDURE Step

Action

1

Assuming everything is stopped and that any gas has been cleared: •

SET the fan at approximately 20% of design supply (20% of normal speed)

•

CLOSE all fire dampers in return air path

•

OPEN all fire dampers in fresh air path

•

OPEN all fire dampers in supply air path

•

OPEN all fire dampers associated with pressure relief dampers

•

START fans in AHU

2

Smoke purge will have to take place through the pressure relief system, therefore the quantity of supply air will need to be restricted.

3

It is not recommended that doors into the remainder of the LQ are open, as this will tend to disperse the smoke into the LQ.

4

Due to the relatively low air change rate the purge time would in the order of 1 hour or more.

5

If a purge system is required in the LQ any one AHU could be made to run on 100% fresh air by:

6

•

OPENING the fresh air and return air dampers of the standby unit and allowing fresh air to be drawn into the operating unit through the return air opening via the return air and fresh air openings in the standby unit

•

All LQ return air fire dampers would need to be closed

•

All internal and external doors would need to be opened

•

All supply air fire dampers would need to be open

RE-INSTATE inhibited smoke heads to normal.


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V32_HVAC_Systems.pdf

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