Description
Once Through Steam Generator (Otsg)
Manufacturer: Innovative Steam Technologies
Type: Once through steam generator
Number of boilers: 4
Working pressure (HP): 865 psig / 59.62 kg/cm²(g)
Working pressure (LP): 68.3 psig / 4.71 kg/cm²(g)
Design pressure (HP): 953 psig / 65.71 kg/cm²(g)
Design pressure (LP): 103 psig / 7.10 kg/cm²(g)
Hydraulic test pressure (HP): 1884 psig / 129.87 kg/cm²(g)
Hydraulic test pressure (LP): 384 psig / 26.47 kg/cm²(g)
Flue gases: Gas turbine exhaust flue gas
Capacity (HP): 107,600 lb/hr / 48,806.5 kg/hr
Capacity (LP): 35,570 lb/hr / 16,134.28 kg/hr
Design dry running gas temperature: 986°F
Maximum operating gas temperature: 856°F
Dry running capability up to 560°C
Barge
Function: Contains and delivers one combined cycle barge mounted floating power plant of nominal net capacity 220 MW, consisting of 4 once through steam generators, 1 steam turbine generator, 4 combustion gas turbine generators, and auxiliary equipment
Barge size (length x width x depth): 106 m x 55.2 m x 6 m
Barge draft for towing: 2.4 m (normal operation 3.4 m)
Total barge weight: 13,900 tonnes
Barge itself including steam turbine hall, control building and above deck foundations: approximately 6,000 tonnes
Stability: Designed to comply with intact stability regulation of US 46 CFR Chapter I, Section 174.015 for river and harbor service
Stability: Designed to comply with one compartment damage stability regulations of US 46 CFR Chapter I, Section 172.065
Stability: Designed to comply with wind heeling moment as defined in CFR Chapter I, Section 174.055
Stability: Designed to comply with IMO International Convention on Load Lines
Barge access: Four ramps designed to access the barge from shore
One main ramp 6 m wide
One ramp 4.5 m wide
Two auxiliary ramps 3.5 m wide respectively
Barge ventilation: Below deck spaces ventilated according to recommended practices of SNAME T&R 4 to 16” calculation merchant ship heating, ventilation and air conditioning design
Fans sized to limit temperature rise in ventilated spaces to less than 5°C and to provide sufficient ventilation air to ensure noxious fumes are below accepted occupational safety regulation levels
Chillers
Function: Cool gas turbine intake air and enhance output of each gas turbine by 7 to 10 MW approximately
Operation: Vapour compression cycle using refrigerant HFC134a
Motor: Hermetically sealed
Lube oil and motor windings cooled by refrigerant
Design criteria: GT chiller coil required cooling capacity: 1200 USRT x 2 sets
GT chiller cooling coil design condition: Inlet air condition (ambient): 37°C DB / 75% RH
Outlet air condition (GT inlet air): 7.22°C DB / 95% RH
GT inlet air flow rate: 128.9 kg/s
Chilled water supply / return temperature: 5°C / 13.8°C
Chilled water flow rate: 326 m³/h
Chilled water system consists of the following equipment:
Group 1: GT-1 combustion air chilling coil #1 (100%, 1 set)
GT-2 combustion air chilling coil #2 (100%, 1 set)
CS-M-CH01-1A centrifugal chiller #1A (50%, 1 set)
CS-M-CH01-1B centrifugal chiller #1B (50%, 1 set)
CS-M-CH01-2A centrifugal chiller #2A (50%, 1 set)
CS-M-CH01-2B centrifugal chiller #2B (50%, 1 set)
CS-M-PP01-1A chilled water circulation pump #1A (50%, 1 set)
CS-M-PP01-1B chilled water circulation pump #1B (50%, 1 set)
CS-M-PP01-2A chilled water circulation pump #2A (50%, 1 set)
CS-M-PP01-2B chilled water circulation pump #2B (50%, 1 set)
Group 2: GT-3 combustion air chilling coil #3 (100%, 1 set)
GT-4 combustion air chilling coil #4 (100%, 1 set)
CS-M-CH01-3A centrifugal chiller #3A (50%, 1 set)
CS-M-CH01-3B centrifugal chiller #3B (50%, 1 set)
CS-M-CH01-4A centrifugal chiller #4A (50%, 1 set)
CS-M-CH01-4B centrifugal chiller #4B (50%, 1 set)
CS-M-PP01-3A chilled water circulation pump #3A (50%, 1 set)
CS-M-PP01-3B chilled water circulation pump #3B (50%, 1 set)
CS-M-PP01-4A chilled water circulation pump #4A (50%, 1 set)
CS-M-PP01-4B chilled water circulation pump #4B (50%, 1 set)
Name plate details: Type: Centrifugal
Make: Carrier, USA
Refrigerant used: R 134A
Quantity of refrigerant charge: 1270 kg
Number of chillers: 8
Capacity: 1210 USRT each
Motor: Hermetically sealed
Rated power: 808 kW
Design chilled water temperature: 5°C
Delta T across evaporator: 8.8°C
Chilled water flow rate: 415.77 m³/hr
Design sea water inlet temperature: 29°C
Delta T across condenser: 6°C
Condenser sea water flow rate: 739 m³/hr
Number of tubes in evaporator: 976
Evaporator tube diameter: 19.05 mm
Evaporator heat transfer area: 228 m²
Evaporator tube material: Copper
Chilled water: DM water
Evaporator fouling factor: 0.00008806 m²·°C/W
LMTD across evaporator: 7.13
Evaporator approach: > 1°C
Number of tubes in condenser: 1170
Condenser tube diameter: 19.05 mm
Condenser heat transfer area: 257 m²
Condenser tube material: Titanium
Condenser fouling factor: Not specified
