985 22647-R02 Installation Manual ORCA Offshore Part1

Installation Manual Fresh Water Maker ORCA ORCA Offsho re Document No.: 985 22647 Rev. 02

Project Name Name Project No. Serial No.

: : :

Created Created by ALFALAVAL Copenhagen Copenhagen

Generally most of the items installed in the ORCA can be found in the equipment, valve or the instrument list in the appendix. Additionally Part Lists and drawings can also also be found in the appendix. appendix. All items on the lists refer to a tag number in the PID. Equipment, valves or instruments for which Alfa Laval supplies spare parts, can be found with article numbers in the Spare Parts Manual. Spare parts for the electrical control panel as well as parts for the separator vessel which cannot be found in the equipment, valve or the instrument list are included separately in the Spare Parts Manual. When requesting or ordering spare parts from Alfa Laval please always state: The ORCA serial number (Please see name plate mounted on the equipment, current front page or footer) Article number & item description Tag number (if relevant). Alfa Laval Service The Alfa Laval group is represented in all major parts of t he world. DO NOT hesitate to contact your local Alfa Laval Sales Company if you have any questions, problems or require spare parts. Find us at www.alfalaval.com

Alfa Laval reserves the right to make changes changes at any time without prior notice. Any comments regarding possible possible errors and omissions or suggestions suggestions for improvement of this publication would be gratefully appreciated. Copies of this publication can be ordered from your local Alfa Laval Sales Company. Published by: Alfa Laval Copenhagen A/S Maskinvej 5 DK-2860 Søborg Copenhagen) Denmark © Copyright Alfa Laval Copenhagen A/S. This document and it content must not be copied, reproduced, transmitted or disclosed to any third party without consent of Alfa Laval Copenhagen Copenhagen A/S.

985 2264722647-R02 R02 Installati on Manual ORCA ORCA Offshor e Part1.doc Part1.doc

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Installation Instructions 1

SAFETY INSTRUCTIONS AND WARNINGS

4

Safety Instructions and Warnings General Safety Precautions

4 4

2

ENVIRONMENT DECLARATION

5

3

STORAGE AND TRANSPORTATION

7

Storage Preservation Procedure for control panels Preservation Procedure for Solenoid Valves Preservation Procedure for Motors Preservation Procedure Compressor Transportation

7 8 8 8 9 10

PERFORMANCE CRITERIA

11

Sea water – Design water Analyses

12

INSTALLATION

12

Installation description Electrical Equipment Seawater Supply Brine and Seawater Discharge Distillate Discharge Space Requirements Ambient Conditions Vibrations General Safety Precautions Scale Inhibitor Dosage Equipment for Feed Water

12 12 13 13 13 13 13 13 13 13

SYSTEM DESCRIPTION

14

System Description Working Principle Distillate Quality/Salinity Main Components Optional Equipment

14 15 16 16 18

ELECTRICAL SPECIFICATION

19

Environment conditions Local Control Panel (LCP) Cabinet Power Supply Installed Power Earting System PLC HMI

19 19 19 19 20 20 20 21

1.1 1.2

3.1 3.2 3.3 3.4 3.5 3.6 4 4.1 5 5.1 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.1.7 5.1.8 5.1.9 6 6.1 6.2 6.3 6.4 6.5 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8

985 22647-R02 Installati on Manual ORCA Offshor e Part1.doc

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1 1.1

Safety Instructions and Warnings Safety Instructions and Warnings The following symbols in this manual point out safety precautions. It means your attention is needed and your safety is involved.

Warning This symbol is used to indicate the presence of a hazard, which can cause severe personal injury if the warning is ignored.

Caution This symbol indicates the presence of a hazard, which can cause property damage if the instructions are not observed.

Note This type of instruction indicates a hazard, which could cause damage to equipment.

1.2

General Safety Precautions It is the responsibility of both operator and owner to ensure that all personnel involved in the use or operation of this equipment follow all safety i nstructions. Read all safety instructions carefully and insist that they be followed by those working with you and for you. Not following the instructions may cause severe personal injury or damage the equipment beyond repair. Do not allow this equipment to be used if it is faulty or the operator does not understand the proper use.

Warning The ORCA is not to be operated in polluted water. The produced water can be unsuitable for human consumption.


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Warning Noise hazards Use ear protection in noisy environments. Crush hazards Use correct lifting tools. Do not work under hanging load.

Caution Burn hazard Wear gloves to avoid burns by hot surfaces. Cut hazards Wear gloves to avoid cuts by sharp edges when handling machined parts. Wear helmet to avoid cuts by sharp edges when maintaining the machine.

Note Max. ambient temperature for ORCA is 50°C Min. ambient temperature for ORCA is 2°C ( if nothing else is mentioned in the Technical Specification)

Always handle the equipment with great care. Take precautions not to damage the parts during transportation and installation.

Warning Before start-up: Check that your main supply cable size, voltages, frequency and maximum error current agrees with the electrical specifications.

Warning Before start-up: Check that all connections are properly earthed (grounded) in accordance with local regulations, and properly isolated.

2

Environment Declaration 985 22647-R02 Installati on Manual ORCA Offshor e Part1.doc

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Type: ORCA freshwater generator Manufacturer: Alfa Laval Copenhagen A/S, Maskinvej 5, 2860 Søborg, Denmark Product: ORCA Offshore Production site: Alfa Laval Copenhagen A/S, Maskinvej 5, 2860 Søborg, Denmark Local environment legislation or regulation to consider: The ORCA must be installed and operated with respect to any local environment legislation. It is the purchaser / owner of the ORCA responsibility to follow any legislation or regulation. It is the purchaser / customers responsibility to make sure that all necessary approval from the environmental authorities is obeyed, before installing and operating the ORCA. Handling of waste: In relation to maintain the ORCA, it is necessary to dispose cip-, dechlorinationand anti scale fluids and oil-soil from the compressor All waste shall be stored in safe approved containers and be handled and disposed after the local environmental regulations. Handling of hazardous materials: Cip-, dechlorination- and anti scale fluids shall be stored in safe approved containers before and after use. All handling of hazardous materials shall take place after present local environmental regulations. Schemes for correct dosing chemicals are located under the “Feed Water Treatment” section in this manual. Noise: The ORCA has a noise emission of maximum 81dBA. It is necessary to use ear protection when operating the ORCA. Discharge of process water: The salinity in the process water from the ORCA can have an impact on the local environment if it is channelled into the ground or areas near freshwater. If the ORCA is placed offshore, the process water is harmless when it is lead back to the sea. It is the purchaser / customer’s responsibility to make sure that the ORCA installation has no impact on the local environment. Emission to air: There is no emission to air from the ORCA. Risk of soil and ground water pollution: Following the instructions in this manual, there is no risk for soil and ground water pollution. Disassembling and disposal of the ORCA: Disassembling and disposal of the ORCA shall be executed after the present local environmental regulations regarding all separate materials. 985 22647-R02 Installati on Manual ORCA Offshor e Part1.doc

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3 3.1

Storage and Transportation Storage Alfa Laval standard packing(seaworthy) is suited for transportation and for up to 6 months indoor storage in a vibration free area at a temperature ranging between 15 to 45 oC (59 to 113 oF) and with a humidity around 70%. For crate storage up to 8 months from date of delivery it is only necessary to check the crate for external physical damage and view humidity levels at two weeks intervals. Records of date for inspection and results shall be maintained. Should the humidity level be high it can be assumed that the bag is breached. The crate should be opened desiccant replaced and the bag evacuated and resealed. For security the crate should be re-closed. Should it be necessary to remove the original packing for pre-commissioning, the following should apply for up to six months prior to commissioning. Turn rotating equipment by hand once per week leaving in a different resting position. Keep equipment protected against rain, dust, sand etc. stored under a secured polythene sheet. Repair paints damage promptly. Change electrical desiccant once per month. Permanently energise anti-condensation heaters for electrical equipment. Post notice prohibiting climbing or abuse of equipment. In the event of physical damage or queries contact Alfa Laval Copenhagen. There are no lubrication requirements for the equipment during storage. Releasing of flanges and unions shall be permitted for draining low and dead parts of the system. Note There should ABSOLUTELY NOT be any OZONEPRODUCING equipment in the room, like operating electric motors or arc-welding, since ozone destroys many rubber materials. Do not store organic solvents or acids in the room. Avoid heat and ultraviolet radiation.

The Alfa Laval standard packing is NOT suited for outdoor storage, Alfa Laval can therefore not be held responsible for any damage to the ORCA under these conditions. In case it is needed to unpack the ORCA the yard is responsible for protecting the equipment as Alfa Laval can not be held responsible for any damage when stored under these conditions. 985 22647-R02 Installati on Manual ORCA Offshor e Part1.doc

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3.2

Preservation Procedure for control panels The panels have to be disconnected from the main supply and kept clean and dry during the long-term standstill period. The panel is kept dry inside either by an anti-condensation heating element or by use of a desiccant. Warning If anti-condensation heater is used, prominent warnings of live terminals inside the panel must be posted inside and outside the panel.

The electric panel normally includes motor starters with thermal relays, transformer, contactors and salinometer. Remove the salinometer sensor in the distillate pipe after the distillate pump, clean the sensor and store it in the electric panel or in a dry place. 3.3

Preservation Procedure for Solenoid Valves The solenoid valves and the associated on/off valves should be activated every 6 months with the normal operating air pressure. The valves are operated using the control switches on the relevant control panel. The solenoid valves should be removed, flushed with warm freshwater and stored in a clean dry ozone free area. Before replacing, the valves should be flushed again with warm freshwater and the valve functions are to be checked by energising the coil.

3.4

Preservation Procedure for Motors Factory fitted bearings use a lithium-based grease with a recommended shelf life of two years. If stored for a longer period, grease may need to be replaced. Shielded bearings have a storage life of five years and a further two years operational life following the installation. To avoid static indentation during long term stand still, the area should be vibration free. Where exposure to some vibration is unavoidable, the shaft should be locked. Roller bearings may be fitted with a shaft-locking device, which should be kept in place during long term stand still. Shaft should be rotated by hand, one quarter of revolution weekly.


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Warning Where anti-condensation heaters have been fitted, it is strongly recommended that they are energised. In such case, prominent warnings of live terminals inside the terminal box must be posted inside and outside the motor terminal box.

Where anti-condensation heaters are not fitted, the use of desiccant is recommended.

3.5

Preservation Procedure Compressor Remove the belt and store it in a clean dry ozone free area. Turn the compressor rotor twice a week. Stuffing boxes, shaft passages at shaft seals should be wrapped in DensoBindings (wax-permeated Jute bindings). The running surfaces and bushings should be coated with Molycote. Labyrinth shaft seals must be treated with long-term protective material such as Tectyl No. 505. Anti-corrosive wax should be applied to the running surfaces on the pulleys.


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3.6

Transportation All transportation of the ORCA must be in accordance with local regulations. Always handle the equipment with great care. Make sure not to damage the parts during transportation. After transportation the crates should be visually inspected for physical damage. In the event that the packing is damaged the following action shall be taken: Remove sufficient packing to verify that there is no physical damage to the goods. On finding no damage replace and repair packing. In the event of physical damage to the goods Alfa Laval Copenhagen inspection shall be requested. Any damage to paint shall be repaired promptly in accordance with the approved paint repair procedure. The ORCA must be lifted using the lifting points indicated on the ORCA, hooked where the following label is placed:

Warning The ORCA is very heavy. Lifting the ORCA or parts therefore may be hazardous to personnel. Ensure that safe working load of the lifting equipment is sufficient t o lift the ORCA. Remember to lift simultaneously at all lifting points indicated to ensure an even load.

Warning Make sure that the lifting equipment has the required breaking strength to lift the unit. See weight in General Arrangement drawing.

985 22647-R02 Inst allat io n Manual ORCA Offsh ore Part1.do c

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4

Performance criteria The desalination system has been designed according to the parameters outlined in the end of the installation manual; however, the performance of the system is also subject to the following criteria: a) Raw water supply shall be seawater with a concentration of no more than 3.5%, unless otherwise stated. The seawater shall be pre-filtered by the customer to remove suspended solids larger than 0.5 mm. Further, the seawater used shall not contain pollutants, such as oil, fat, detergents, organic matters, micro-organisms, algae, humic matter, mud, clay, sand, etc. Generally the allowance of such undesirable matter shall not surpass content in the raw water supply that results in a fouling factor of the heat transfer surfaces higher than 15% of the normal practice within international desalination engineering practice. Moreover, the seawater supply shall not contain corrosive substances or gases such as H2S, free Chlorine, Fluorine, etc. higher than stated in the specification or other substances, which can alter the physical-chemical properties of the raw water. b) Supply of Utilities and consumables such as: Air, electric power shall be provided on a constant basis and at the values for voltage, Phases and Frequency required and specified in this quotation, and not presenting fluctuations of more than 5 %. The pre-treatment chemicals shall be dosed in the correct amount and type recommended by Alfa Laval. The raw water shall be supplied constant and without variations at the required flow and pressure. c) The equipment shall be properly operated in accordance to the instruction manuals provided by Alfa Laval for this purpose. Critical parameters shall be kept within the design values for: flows, pressures, temperatures, chemicals dosage, evaporating temperature, water recovery factor, maximum allowed brine concentration etc. plus proper observance of the maintenance procedures included in the manuals. Recording of the operation parameters plus written logging of the preventive and corrective maintenance will be the only valid documentation for evaluation of performance of the equipment delivered. Improper physical handling of the equipment and components will cause immediate invalidation of guarantees of performance.


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4.1

Sea water – Design water Analyses .................... TSS ............. < 2,00 p.p.m. (mg/l) pH ............... 8,26 TDS ............ 35.175,00 p.p.m. (mg/l) ++ Calcium Ca 408,1 p.p.m. (mg/l) ++ MagnesiumMg 1.297,50 p.p.m. (mg/l) + Sodium...Na 10.767,80 p.p.m. (mg/l) + Potassium K 387,6 p.p.m. (mg/l) + Barium ... Ba 0 p.p.m. (mg/l) BicarbonateHCO3 142,5 p.p.m. (mg/l) Chlorides Cl 19.360,50 p.p.m. (mg/l) SulphatesSO4 2.701,70 p.p.m. (mg/l) Fluoride ....F 1,3 p.p.m. (mg/l) Bromium Br 65,9 p.p.m. (mg/l) Iridium ....... I 0,05 p.p.m. (mg/l) Silica ....SiO2 2,4 p.p.m. (mg/l) .................... Spec. densityy at 20 oC 1.024.0 kg/m3 ................... Ref. Standard Sea Water according to OSW 3 Note: The seawater supplied shall, by proper design of seawater intake and proper filtration be free of impurities, such as mud, clay, silt, algae etc. which could cause fouling and/or blockage in the unit.

5 5.1

Installation Installation description The ORCA is delivered as a unit that can be either bolted or welded to the floor plate. See attached Foundation Plan drawing. When the Fresh Water Maker is complete and fastened to the floor plate all terminal points shall be connected to supply seawater, service water, instrument air and electrical power. Secure free access for discharge of drain water and distillated water. The terminal points for hook-up are detailed on the general arrangement drawing and on the P&ID´s. The hook-up does not require the presence of Alfa Laval personnel.

5.1.1 Electrical Equipment A control panel with starters for electric motors is delivered mounted on the units. Check all connections and cables to make sure that the frequency and voltage agrees with the electrical specifications Check that all connections are properly earthened (grounded) in accordance with local regulations, and properly insulated. All electric installations must be carried out by a professional electrician in full accordance with local regulations. 985 22647-R02 Inst allat io n Manual ORCA Offsh ore Part1.do c

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5.1.2 Seawater Supply The seawater supplied to the unit has to pass a filter (customer supply) in the sea water line before the feed water line and ejector pump. Please refer to the P&ID´s for recommended pipe dimensions. 5.1.3 Brine and Seawater Discharge This line is and open line. Please refer to the P&ID´s for recommended pipe dimensions 5.1.4 Distillate Discharge Please refer to the P&ID´s for recommended pipe dimensions 5.1.5 Space Requirements The space requirements are indicated on the service area drawing of the ORCA unit. See attached service area drawing. 5.1.6 Ambient Conditions When determining where to place the ORCA, consideration must be paid to a number of ambient conditions such as vibrations, service space, allowable back pressure, and pressure loss. 5.1.7 Vibrations The ORCA can’t be placed in an area known to be subject to frequent and high vibrations. However, under normal conditions no further precautions are necessary. 5.1.8 General Safety Precautions Always handle the ORCA with great care. Make sure not to damage the parts during transportation or installation. During erection all inlets and outlets must be covered to be protected from dirt and particles. 5.1.9 Scale Inhibitor Dosage Equipment for Feed Water The Anti scale tank with pump and safety valve shall be positioned max. 2 m from the ORCA. Fittings and hose is supplied with the tank. Installation is to be done by Yard.


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6 6.1

System Description System Description

4 Compressor

14

Condenser

Evaporator

10 13 FreshWaterTo

11

Tank

1 8 6

Brine Overboard

9 2 7 3

SeawaterFrom Sea

12

1. Vent condenser 2. Circulation pump 3. Brine pump 4. Compressor 5. Air ejector 6. Distillate pump 7. Brine heat exchanger 8. Distillate heat exchanger

Seawater Overboard

5

9. Electrical heater 10. Filter 11. Sight glass 12. Filter 13. Evaporating chamber 14. Condenser chamber


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6.2

Working Principle Numbers in the text below refer to the drawing above: Seawater is supplied to the ORCA where it is divided into t wo streams, one as feed water and one as jet water for the ejector (5). The feed water stream is divided into two equal streams to the plate heat exchangers (7, 8). One stream passes through the distillate / feed water pre-heater (8) and the other stream through the brine / feed water pre-heater (7). The i ngoing feed water is heated in the plate heat exchangers by the outgoing brine and distillate flows obtained during the process. After the pre-heaters, the feed water stream from the distillate cooler is led through a vent condenser (1) into the evaporation chamber (13). In the vent condenser the temperature of the feed water is increase slightly. This is caused by condensing vapour and the cooling down of the non-condensable gasses vented to the atmosphere by means of the Ejector (5). The other stream is led directly into the evaporation chamber (13) where it is mixed with brine. Approx. 90% of this blended mixture is circulated by the circulation pump (2) and discharged into the evaporator/condenser for evaporation. The remaining 10% is extracted by the brine pump (3) and led through the brine / feed water pre-heater (7) in order to heat up the incoming feed water, and then finally discharged overboard. The blended feed and brine flow, circulated by pump (2), is discharged into the evaporator where it flows through the distribution channels of the plates and down in an even and controlled falling film. While flowing down, the brine film is heated up and partially evaporated by the heat obtained from the condensation of vapour on the other side of the plates. The released vapour in chamber (13) is then sucked through a demister by the centrifugal vapour compressor (4) which compresses the vapour and thereby increases its temperature wit h approx. 35°C. The vapour is then led back into the condensation chamber (14) where the evaporator/condenser plate stack is situated. Here the vapour condenses into pure distillate yielding its latent heat and thereby evaporating the brine on the other side of the plates. The distillate produced in the condenser is extracted by the distillate pump (6) which pumps it through the distillate / feed water pre-heater (8) in order to heat up the incoming feed water, and then to the storage tank. The evaporation process normally takes place around 75°C. The evaporation effect is done at sub-atmospheric conditions, where the vacuum is created by means of the ejector (5), which initially evacuates the air from the system, and afterwards maintains the vacuum by extracting the non-condensable gases and venting them to the atmosphere. The electrical heater (9) is primarily for starting up the process.


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6.3

Distillate Quality/Salinity To continuously check the quality of the produced distillate, a salinometer (measuring conductivity) is provided together with an electrode unit fitted on the delivery side of the distillate pump. If the salinity of the produced distillate exceeds the chosen maximum value, the dump valve and alarm are activated to automatically dump the produced water to open drain. If there are no special requirements from the authorities, the produced distillate can be used directly as drinking water. Otherwise the distillate should be posttreated in suitable equipment.

6.4

Main Components The ORCA consists of the following main components: 1. Evaporator/Condenser section The evaporator/condenser section consists of a titanium plate heat exchanger and is mounted inside the separator vessel. It generates the distillate by evaporating the feed water on one side of the plate and condensing it on the other. The evaporator and the condenser section are internally separated with a partition plate. 2. Feed water pre-heaters The pre-heaters are two titanium heat exchangers (one brine cooler and one distillate cooler) where the incoming feed water is pre-heated by the excess heat obtained during the process in the outgoing brine and distillate flows. 3. Separator vessel The separator vessel is made by stainless steel and contains the plates as well as other interior construction parts. Further anodes are mounted in the vessel. 4. Air ejector The ejector evacuates the air to create vacuum inside the vessel. During operation, the ejector maintains the vacuum by extracting the non-condensable gases from the separator vessel. Maximum backpressure at seawater outlet is normally 0.6 bar g, due to the performance of t he Air Ejector. 5. Brine pump The brine pump is a single-stage centrifugal pump. The brine pump extracts part of the brine from the bottom of the vessel to ensure a constant brine level and concentration, and pumps the water through the brine/feed water pre-heater to discharge. The brine discharge is internally connected to seawater outlet. 6. Distillate pump The distillate pump is a single-stage centrifugal pump. The distillate pump extracts the produced distillate from the vessel and pumps the water through the distillate/feed water pre-heater to a tank or post t reatment equipment, if any. 985 22647-R02 Inst allat io n Manual ORCA Offsh ore Part1.do c

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Normally discharge pressure at is 0.6 bar g. (If nothing else is mentioned in the technical specification). 7. Circulation pump The circulation pump is a single-stage centrifugal pump. The circulation pump circulates the brine/feed water mixture into the evaporator/condenser to ensure a constant flow of feed water to the evaporating channels in the plate stack As the brine is heated as part of the process inside the plate heat exchanger in the vessel, its latent heat is used to pre-heat the cold i ncoming seawater. 8. Control panel / HMI The control system is for operating monitoring the ORCA unit. This includes starting up and stopping components as well as the continuous monitoring of ORCA performance. The panel contains of motor starters with thermal relays, running lights, salinometer, as continuously checks the salinity of the produced water. Besides of the PLC and HMI, where all action and monitoring of performance and parameters are performed. The ORCA is entirely operated from the touch panel on the HMI. 9. Electrical heater The electrical heater is primarily used for starting up the process and will automatically shut off when the process is on its specified values. The electrical heater also switches on during actual operation, if the heat exchanger temperature falls below adjustable set points. 10. Vapour compressor The vapour compressor is a single-stage centrifugal vapour compressor. The compressor compensates for the loss of energy in the heat exchangers, the heat radiating from the vessel during operation, and loss of energy through the air ejector. The performance of the centrifugal compressor is vital to the process. It supplies the energy required to drive the process inside the ORCA . The vapour compressor is a single-stage centrifugal vapour compressor which rise the pressure of the produced vapour and thereby increases the temperature of the vapour with approx. 3-5°C, this temperature increase keep the process running. 11. Vent condenser The vent condenser is a small plate heat exchanger (PHE). The hot vapour from the evaporation phase is cooled by incoming feed water, yielding its heat to the feed for pre-heating. The vent condenser cools the vented vapour before it reaches the ejector. The ejector may function less efficiently, if the entering feed water temperature is too high. 12. Separator The demister is a small-meshed filter in stainless steel. The demister filters off droplets in the produced vapour before the vapour enters the compressor. 13. Anti scalant dosing unit The anti scalant dosing unit consist of a dosing pump mounted on a tank with manual agitator and low level switch. The anti scalant is dosed to the feed water. 985 22647-R02 Inst allat io n Manual ORCA Offsh ore Part1.do c

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All the above equipment is mounted and internally wired on the ORCA.

6.5

Optional Equipment 14. Seawater pump The seawater pump is a single-stage centrifugal pump. This pump supplies the ORCA with seawater for the air ejector as well as feed water for evaporation. 15. Distillate Booster Pump A distillate booster pump with a backpressure valve can be added as loose supply to the ORCA. A motor circuit breaker for the distillate booster pump is installed in the control panel. The distillate booster pump starts simultaneously with the distillate pump. This option can be needed if the distillate discharge pressure is more than 0.6 bar g. 16. De-chlorination dosing unit If the feed water (seawater) contains more than 0,5% ppm of Chlorine *, it is recommended to inject de-chlorination agent into the feed water, in order to minimize corrosion. 17. Mineralisation Filter Water produced from any freshwater generator, reaches a pH-value of 5 to 7.0. To bring the pH-value back to neutral ( 7 – 8.5 ) a pH-adjustment filter is to be installed after the freshwater generator. Drinking water should have a minimum of carbonate hardness for human healthcare and beside this, the carbonate hardness is helping to form protective layers against corrosion on all wetted surfaces for instance within the pipe manifolds.

* Free chlorine ions.


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7 7.1

Electrical Specification Environment conditions As a standard the plant is designed to operate in the following conditions: Ambient Temperature Seawater Temperature Humidity

2 °C to 50 °C 18 °C to 32 °C < 90 % NonCondensing Indoor & NonHazardous

Location

7.2

Local Control Panel (LCP) The LCP is designed as a combined control and MCC (Motor Control Center) panel in a common cabinet. The LCP is installed directly on the ORCA frame.

7.3

Cabinet The cabinet material is (CS) sheet steel with the below specified thickness : Enclosure 1.5 mm Door 2.0 mm Mounting Plate 3.0 mm The cabinet has the following surface finish: Enclosure & Door Dip coat primer and powder coated Mounting plate Zinc plated The standard cabinet color is light grey, RAL 7035. The cabinet is protection class IP54 .

7.4

Power Supply A single power supply is needed for the LCP. The following power supplies are standard: Voltage 3x380V 3x400V 3x415V 3x690V 3x440V 3x460V 3x480V

Frequency 50Hz

60Hz

The following permanent variation in voltage and frequency can be accepted :


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Voltage

Permanent Variation ±10%

Frequency

±2%

Typically a 200 A circuit breaker (or fuse) shall be installed on the main power supply for the ORCA. 7.5

Installed Power The typical rated power installed on the ORCA is specified in below table : Plant size ORCA 20 ORCA 30 ORAC 40 ORCA 50 ORCA 60 ORCA 70

50Hz 71 kW

60Hz 78 kW

80 kW

87 kW

The standard LCP is designed for a short circuit level of 30 kA. 7.6

Earting System The earthing system is IT. The earth bar is divided in 2 earth bars in the LCP. Instrument Earth Bar IE Protection Earth Bar PE Instrument Earth Bar The instrument cable screen is connected to the instrument earth bar in LCP. The instrument screen is standard not connected to the earth terminal on the instrument. The instrument earth bar is insulated from the LCP cabinet. Protection Earth Bar The earth conductor in all power cables (yellow/green insulation) are connected to the protection earth bar in LCP and the equipment (motors and heater). The protection earth bar is connected to the LCP cabinet. Earth bonding is installed between ORCA freshwater maker skid and: Vessel Frames LCP Motors 16mm2 yellow/green insulated earth conductor is standard i nstalled on all bonding, bonding on small motors (< 5kW) is, however, 6mm 2.

7.7

PLC The operation of the freshwater maker is controlled by a Programmable Logic Controller (PLC) with automatic start-up / stop and automatic production. 985 22647-R02 Inst allat io n Manual ORCA Offsh ore Part1.do c

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7.8

HMI A touch screen operator panel (HMI) is installed on the front of LCP. The freshwater maker can be operated from the HMI only, however the plant can also be started and stopped from remote (hardwired signals).


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985 22647-R02 Installation Manual ORCA Offshore Part1

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