SECTION 6
6.1 General description The Circulating Water (CW) System comprises the following sub systems- Main Cooling Water (MCW) System & Auxiliary Cooling Water (ACW) System. The prime function of the main cooling water (MCW) system is to provide cooling water (sea water) to the main condensers for the purpose of condensing the exhaust steam for reuse in turbine cycle. This system shall also provide cooling water for the Auxiliary Cooling Water (ACW) system to cool the DM water in the CCW Plate type Heat Exchangers and to condenser vacuum pump seal water coolers. The CW system would operate in a closed cycle mode of cooling by using an induced draft cooling tower for cooling the hot water discharged from condensers which is again recirculated by circulating water system. The heat is rejected to the atmosphere through cooling tower.
6.1 General description The Circulating Water (CW) System comprises the following sub systems- Main Cooling Water (MCW) System & Auxiliary Cooling Water (ACW) System. The prime function of the main cooling water (MCW) system is to provide cooling water (sea water) to the main condensers for the purpose of condensing the exhaust steam for reuse in turbine cycle. This system shall also provide cooling water for the Auxiliary Cooling Water (ACW) system to cool the DM water in the CCW Plate type Heat Exchangers and to condenser vacuum pump seal water coolers. The CW system would operate in a closed cycle mode of cooling by using an induced draft cooling tower for cooling the hot water discharged from condensers which is again recirculated by circulating water system. The heat is rejected to the atmosphere through cooling tower.
provide sufficient submergence & NPSH to the pumps for all modes of operation. Circulating water, exiting the cooling tower is collected in the cooling tower basin. A forebay structure channels the flow from both the cooling tower basins into the individual MCW Pump forebay. Removable coarse screens are provided in each intake channel to capture trash and debris. In addition to the coarse screens, slots are also provided at the mouth of each channel at the upstream side of coarse mesh to allow installation of stop log. One (1) stop log is provided for all the slots. Stop log allows one intake bay to be isolated and dewatered without affecting the operation of other MCW Pumps. Chlorine shall be dosed in the CW intake sump for the prevention of biological growth in the sump. The Circulating Water System mainly consists of the following components: -Four (4 x 25% capacity) nos. vertical wet pit type main cooling water (MCW) pumps with motors and accessories
6.2. Circulating Water Pump A. Summary Four (4x25% capacity) nos. main cooling water pumps are provided to supply the cooling water to the CW system. These pumps are vertical, single stage, mixed flow, wet pit type and driven directly by the electric motor. The design flow of the MCW pump is based on the total cooling water requirement in the condenser plus the water requirement for the Sea water booster pumps for ACW syste m. MCW Pumps will take suction from the intake sump which is designed to ensure that adequate and smooth flow of water exists to all the pumps even at the minimum submergence level and minimum water level. Each MCW Pump and motor is capable of starting with discharge valve closed and also capable of operating between zero
APPLICA BL E TO : NOTE :
PURCHASE
PROPOSALS
AS BUILT
INDICATES INFORMATION TO BE COMPLETED BY PURCHASER
DOC NO.
BY MANUFACTURER
1
CENTRIFUGAL PUMP DATA SHEET
2 3
CUSTOMER
LOCATION
4
UNIT
SERVICE
5
NO. PUMPS REQ'D
4
6 7
PUMP MFR.
4
ITEM NO. P1PAC01/02/03/04AP001 PROVIDED BY
NO.TURBINES REQ'D
-
ITEM NO.
12 13
PROVIDED BY
-
SIZE & TYPE
LIQUID
3
CAP.(m /hr)
SEA WATER
SUC.PRESS.(kg/cm g) P.T.(℃)
Min.
31.6
SP.GR. at P.T.
MAX.
2
VAP.PRESS. at P.T.(kg/cm .
2
DIFF.PRESS.(kg/cm g)
15
CORR./EROS. CAUSED BY
0.0577
NPSHav(m)
24,350
RATED
0
HYD.
RPM
421
EFF
86
(kW)
1644.7
NOZZLES
SIZE
RATING
FACING
LOCATION
18
SUCTION
-
-
-
-
19
DISCHARGE
60"
20
CASE -MOUNT : -SPLIT :
22
-PRESS.
23
-CONNECT :
CENTERINE AXIAL
RADIAL
MAX.ALLOW.
IMPELLER DIA. (mm)
VENT
FOOT
4.7
DRAIN
RATED 1220
BRACKET
-VOLUTE TYPE :
FF
SIDE
VERT.(TYPE) SGL.
2
(kg/cm .g) at 31.5 ℃
DBL.
TYPE
SEMI OPEN
(kW)
480.6
(kW)
1912.4
(m)
40.6 20610
3
(m /hr) C.W
NON-WIT. PERF.
WIT. PERF
NON-WIT. HYDRO.
WIT. HYDRO.
NON-VISAUL & DIMENSIONAL
WIT. VISAUL & DIMENSIONAL
DIFFUSER
HYDRO TEST 7.05 (kg/cm2.g)
(m)
8.7
ROTATION(VIEWEDFROMMOTORTOP)
SHOP INSPECTION
GAUGE MAX 1355
% BHP RATED
SHOP TEST
17
AWWA C207 CL D Table1
NPSHre(at Rated)
MIN.CONTINUOUS FLOW
CONSTRUCTION
16
2830475-4
T07119-YT01-P1PAC-120101
MAX.HEAD at RATED IMP.
24 12.86(at LWL)
-
PROPOSAL CURVE NO.
MAX.BHP at RATED IMP.
2.48
TOTAL.HEAD(m)
0.822
RATED
2.16(at delivery elbow)
DIS.PRESS.(kg/cm g)
35.1
1.0334 2
VIS. at P.T.(cP)
24
SERIAL NO.
-
PERFORMANCE
-
MAX.
MTD.BY PUMP MFR MTD.BY
-
VMF1500-1348
-
NOR. 2
14
21
PUMP MFR
OPERATING CONDITIONS EACH PUMP
10 11
Cirebon
NO.MOTORS REQ'D
HYOSUNG-EBARA CO., LTD.
8 9
T07119-YT01-P1PAC-120101
OTHER
CHARACTERISTIC CURVE
Date : 2009/6/18
ITEM No.
: P1PAC01/02/03/04AP001
DOC. No. : T07119-YT01-P1PAC-120002
CUSTOMER
: Doosan / Cirebon PT.CEP
SERVICE : Circulating Water Pump
HECO SER. No.
: 2830475-4
MODEL : VMF1500-1348
SPECIFIED ITEMS : 24,350 m3/hr x 24.0 m ( LIQUID HANDLED =
SEAWATER
:
γ =
x
421
1.03340
-1 min x 2,100 kW x 50 Hz x 14
kg/l :Temp. = 35.1
℃
:
Rev. 0
Poles x 11,000 V
Vis. = 0.8220 cP
)
20 e y E r e l l e p m I @ ) m ( q e r H S P N
FOURTH ISSUE
15
NPSHre
10 5 0 0
5,000
10,000
15,000
20,000
25,000 30,000 35,000 3 CAPACITY ( m / hr )
40,000
45,000
50,000
50
100
45
90
40
80 Pump Efficiency
35
70 )
%
C. Operation Refer attached file for operation. (REFER TO NEXT PAGE)
D. Related Drawings 1) P & I Diagram for Main Cooling Water System 2) General Arrangement Drawing for Circulating Water Pump (REFER TO NEXT PAGE)
6.3. CWP Intake facility A. Summary Intake facility is provided in the circulating water intake structure is to provide the filtered sea water to the condenser via circulating water pumps. The sea water from the sea water make up pumps discharge and the cooled water from the cooling tower basin will be mixed in the cooling tower forebay and enters into the circulating water pumps chamber via the intake facilities. There are 4 nos. of circulating water pumps chambers and each chamber is equipped with fine mesh screen. In addition to above a storage rack is provided to store the 2 nos. of stop logs and these can be used as & when required for isolation of the circulating water pump chambers.
INC (2)
Quantity
(3)
Type
(4)
Dimension (Width x Height)
(5)
Performance data a. Design seawater flow rate
set
Fine Mesh mm
3 m /h
passing through screen b. Design Head (6)
4 W4,400 x H7,100
23,400
mm
1,500
a. Installation angle
DEG
0˚
b. Screen wire gage
mm
1.2
mm
6
General conditions(from vertical)
c. Square opening between screen wires
(2)
Quantity
(3)
Type
(4)
Materials of construction
set
SLIDING VERTICAL LIFT
a. Gate
ASTM A36
b. Embedded guide plate
A240 TP316L A240 TP316L &
c. Sealing part
NEOPRENE
d. Equalizing valve, valve stem
A276 TP316L
link (5)
(6)
2
Weight a. Weight of stop log
kg
Dimension (H x W x L)
m
APP. 5,109 4.9 x 4.682 x 0.41
INC (2)
Quantity
(3)
Type
(4)
Materials of construction
(5)
Weight
(6)
set
1 SELF STANDING ASTM A36
a. Each unit complete
kg
Dimension (L x W x H)
m
APP. 4,863 4.65 x 5.28 x 4.25
C. Operation Not Applicable D. Equipment Drawing (REFER TO NEXT PAGE)
A I D N I N A S O O D / r o t a r t s i n i m d A / 1 3 0 T L E / 6 0 : 8 1 7 2 2 0 2 1 0 2
. d e v r e s e R s t h g i R l l A ? ? ? ? ? . d t L , . o C . n o i t c u r t s n o C d n a s e i r t s u d n I y v a e H N A S O O D y b
A I D N I N A S O O D / r o t a r t s i n i m d A / 1 3 0 T L E / 2 2 : 8 1 7 2 2 0 2 1 0 2
. d e v r e s e R s t h g i R l l A ? ? ? ? ? . d t L , . o C . n o i t c u r t s n o C d n a s e i r t s u d n I y v a e H N A S O O D y b
A I D N I N A S O O D / r o t a r t s i n i m d A / 1 3 0 T L E / 2 2 : 8 1 7 2 2 0 2 1 0 2
. d e v r e s e R s t h g i R l l A ? ? ? ? ? . d t L , . o C . n o i t c u r t s n o C d n a s e i r t s u d n I y v a e H N A S O O D y b
A I D N I N A S O O D / r o t a r t s i n i m d A / 1 3 0 T L E / 3 2 : 8 1 7 2 2 0 2 1 0 2
. d e v r e s e R s t h g i R l l A ? ? ? ? ? . d t L , . o C . n o i t c u r t s n o C d n a s e i r t s u d n I y v a e H N A S O O D y b
6.4 COOLING TOWER SYSTEM A.
Summary
Two (2) sets of induced draft cooling towers with twelve (12) cells each are provided to dissipate heat from the cooling water discharged from condenser and CCW heat exchangers. The heat is dissipated to the ambient air via the process of heat and mass transfer and evaporation from the circulating water. The mechanical induced draft cooling tower is a multi cell, counter flow design with FRP construction and PVC splash / film type fill. The hot water is sprayed into fine water droplets by using spray nozzles. The water droplets fall through the mechanically induced upward moving stream of air. The cooling effect takes place when the warm water and the cooler air come in direct contact with each other. The
B. Key Data
(REFER TO NEXT PAGE)
FOR CONSTRUCTION
4
10-02-23
PS
AKS
H.T LEE
FOR CONSTRUCTION
3
10-02-04
PS
AKS
H.T LEE
FOR CONSTRUCTION
2
09-12-14
PS
AKS
H.T LEE
FOR CONSTRUCTION
1
09-10-12
PS
AKS
H.T LEE
FOR CONSTRUCTION
0
09-09-23
PS
AKS
H.T LEE
FOR CONSTRUCTION
Rev.
Date
Prepared
Checked
Approved
Details of Revision
Owner
Owner's Engineer
Contractor
Technical Data Sheet for Induced Draft Cooling Tower
T07119-YT01-P1PA-120001 CIREBON TPP
DOC. NO PROJECT REV.
4
PAGES
2 of 6
RECORD OF REVSION Rev. A B C D 0 1 2
Date 2009.02.17 2009.04.21 2009.06.24 2009.08.06 2009.09.23 2009.10.12 2009.12.14
Page --------
Description First Issue Revised as per Owner's C omments Revised as per Owner's C omments Revised as per Owner's C omments For Construction For Construction For Construction
3
2010.02.04
--
For Construction
4
2010.02.23
--
For Construction
Revised Data
Explanation
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Resubmitted. There is no change. Resubmitted. There is no change.
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TECHNICAL DATA SHEET OF COOLING TOWER 1.1 DESIGN & OPERATING CONDITION 3
Circulating water flow, total, m /h…………………… 97,400 (2 units) (Design (Guarantee condition) condition) 24 cells Water salt contents((35,872.23x1.1x1.35 COC))
53,270 ppm
(Design (Guarantee condition) condition) 22 cells 53,270 ppm
Hot(inlet) water temp. ℃………………………………
42.8
38.5
43.3
39.6
Cold(outlet) water temp. ℃ …………………………
34.8
30.5
35.3
31.6
Wet bulb temp. ℃, inlet ………………………………
31.4
25.4
31.4
25.4
Relative humidity, % ………………………………… 80 Tower pump head at basin curb, m ……………… 8.22 Total fan B.H.P., (output), kw ……………………… 3602.4 (150.1 x 24cells) Drift loss, % of circulating flow ………………………0.001 Evaporation loss(at design) ………………………… 1.15 Design wind load, m/s ……………………………… 27.78 Design seismic load, ………………………………… UBC97 ZONE 2B Tower site(ground level, roof, etc.) ……………… Ground Level 1.2 STRUCTURAL DETAILS
1.3 MATERIAL OF CONSTRUCTION Frame work members……………………………… FRP Casing………………………………………………… FRP Filling……………………………………………………PVC Support………………………………………… FRP Drift eliminators……………………………………… PVC Spacer………………………………………… PP Fan stacks…………………………………………… FRP Louvers materials…………………………………… N/A Partitions……………………………………………… FRP Water distribution - Type…………………………… Low pressure Header materials……………………………… FRP Lateral materials……………………………… PVC Splashes or spray nozzles…………………………
PP
Stairway & Handrail………………………………… FRP Structure connectors………………………………… SS316L Ring joint connectors………………………………… N/A Bolts, nuts, washers………………………………… SS316L + SS304 Anchor connectors…………………………………… SS316L Nails…………………………………………………… N/A Mechanical equipment support…………………… CS+Epoxy coated Anchor bolts - Materials………………………………SS316L
1.4 MECHANICAL EQUIPMENT 1.4.1 Fans Number ……………………………………………… 22 + 2 additional Type …………………………………………………… Axial flow Manufacturer ………………………………………… COFIMCO Diameter, m ………………………………………… 9.754 Number of blades …………………………………… 9 Fan speed, RPM …………………………………… 115.7 Tip speed, m/s…………………………………………59.1 Fan shaft power, kw ………………………………… 142.6 Blade material ………………………………………
FRP
Hub material ………………………………………… CS + Epoxy Coated Velocity pressure, Pa ……………………………… 37.93 3
Air delivery per fan, m /s …………………………… 635.5 Fan static efficiency, % ……………………………… 69.8 Fan total efficiency, % ……………………………… 86.7 1.4.2 Speed reducers Number ……………………………………………… 22 + 2 additional Type…………………………………………………… Right angle(spiral bevel)
1.4.4 Motor Number ……………………………………………… 22 + 2 additional Type …………………………………………………… TEFC Manufacturer ………………………………………… Hyosung Nominal speed ……………………………………… 1500 RPM Enclosure …………………………………………… IP55 Insulation class ……………………………………… F Elec. char.-phase/cycles/volts ……………………… 3/50/380 Rated H.P., kw…………………………………………175 1.4.5 Vibration switch Number ……………………………………………… 22 + 2 additional Manufacturer ………………………………………… METRIX 1.4.6 Oil level switch Number ……………………………………………… 22 + 2 additional Manufacturer ………………………………………… NOHKEN INC / JAPAN
C. Operation
3.2.1
The induced draft cooling tower makes the heat exchange between the
cooling fluid and the induced air through the tower. The air is then rejected to the atmosphere, loaded with vapour resulting from the heat exchange. The tower is mainly composed of 1. A frame work and its cladding 2. A system of fluid distribution and dispersion a bove the fill 3. The exchange surfaces forming the filling 4. A basin collecting the fluid cooled and from which the circulating pumps feed the various utilities 5. A fan moving the air necessary to the heat exchange 6. Drift Eliminators which catch practically all the water droplets in the air before it is rejected to the atmosphere.
a) Check the power demand immediately after start-up and after 1 hour of running time at which time the gear oil should be at its normal temperature. b) If possible check the bearings (excessive noise and vibration). c) Stop after 1 hour of running and check temperature of all be arings. d) If no over-heating is found, run for a further 4 hours and check temperature again. No overheating is said to occur when the bearing are at a temperature of less than 40°C above ambient temperature. e) Check vibration switch. N.B. : It is recommended that all readings be noted in a log book Note: Condition of Nozzle, Distribution Pipe should be checked manually for any kind of clogging.
•
Check List after Start up
Operation
No particular operating restrictions are applicable when operat ing condition are "normal” The temperature t1 can vary between 4°C and 30.5°C and the flow per cell reduced without creating any particular problems. Nevertheless we strongly recommend that the temperature of the cold water, of the hot water and ambient be recorded in a log book every hour. The gear box oil levels and the various working parts shall be checked at least once during each shift.
D. GA Drawing for Cooling Tower
(REFER TO NEXT PAGE)
