SK30 total energy plant rated at 73% efficiency
The public utility of The Hague, Netherlands, is building a 77,000-kW combined-cycle plant powered by two gas-fired SK30 gas turbines to supply up to 60,000 kW of thermal energy for hot-water district heating along with 69,590 kW of electricity; the overall efficiency of the plant is 74%. The Rolls-Royce generators offer three main modes of operation: 1) electric power only, with no district heating, for a guaranteed output of 77,280 kW at a 44% plant efficiency; 2) the same power output plus partial district heating, available from the residual heat of the hot gases leaving the boilers, raising the plant efficiency to 55%; and 3) slightly lower power output (69,590 kW) and full district heating (60,000 kW), for a plant efficiency of 74%. At the full baseload rating, each gas turbine produces 240 lb/s of exhaust gases at 900/sup 0/F (500/sup 0/C). These gases flow to heat-recovery boilers to raise superheated steam for the steam-turbine side of the combined cycle. Heat exchangers located in the boiler flues extract up to 20,000 kW of heat for district heating. At times of peak heating loads, some steam is bled off the steam-turbine system to supplement the thermal input of the boiler exhaust.
- OSTI ID:
- 7123322
- Journal Information:
- Gas Turbine World; (United States), Journal Name: Gas Turbine World; (United States) Vol. 10; ISSN GTWOD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
034000 -- Natural Gas-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
BOILERS
COMBINED-CYCLE POWER PLANTS
DISTRICT HEATING
EFFICIENCY
ENERGY RECOVERY
EUROPE
EXHAUST GASES
FLUIDS
GAS TURBINE POWER PLANTS
GAS TURBINES
GASEOUS WASTES
GASES
HEAT EXCHANGERS
HEAT RECOVERY
HEATING
MACHINERY
NETHERLANDS
POWER GENERATION
POWER PLANTS
RECOVERY
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
WASTES
WESTERN EUROPE