Entrained gasification combined-cycle control study. Volume 2. Results. Final report
Two control strategies were evaluated for a new type of electric power plant as part of a large utility network. An entrained coal gasifier fuels a gas turbine/steam turbine combined-cycle unit forming the integrated plant which was simulated by computer to analyze alternative control strategies. Transient operation of this gasification-combined-cycle (GCC) plant was studied to determine open-loop response as a stand-alone plant, as well as closed-loop response while functioning in a typical utility power system. GCC plant performance during specified operating contingencies, such as equipment trip or emergency shutdown, was also studied. Features of the GCC plant as simulated include a single-stage entrained (Texaco) gasifier fed concurrently with a coal-water slurry and gaseous oxygen, a cold gas cleanup train with a physical absorption (Selexol) system for selective sulfur removal, and advanced gas turbine design gased upon 2400/sup 0/F combustor outlet temperature. Conclusions are as follows: The GCC plant may be controlled satisfactorily in either gasifier-lead or turbine-lead control mode. The absorber column consistently removed 90% H/sub 2/S in the raw fuel gas from high sulfur Illinois coal. GCC plant pressure control must be installed to minimize plant pressure transients at the absorber column. The local controllers adequately maintained the GCC plant operation during all the emergency upsets. The GCC plant responds well to typical variations in electric power demand. Supplemental fuel gas storage is not required. Oxygen plant can affect the response time of the GCC plant. Response rates of 3%/min at the oxygen plant would make the GCC plant very responsive to electrical load changes.
- Research Organization:
- Fluor Engineers and Constructors, Inc., Irvine, CA (USA); Westinghouse Electric Corp., Concordville, PA (USA)
- OSTI ID:
- 6072902
- Report Number(s):
- EPRI-AP-1422-Vol.2; ON: DE82900084
- Country of Publication:
- United States
- Language:
- English
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COMBINED-CYCLE POWER PLANTS
CONTROL
COAL GASIFICATION
COMPUTERIZED SIMULATION
DESULFURIZATION
ENTRAINMENT
GAS TURBINES
LOAD MANAGEMENT
OPERATION
OXYGEN
SLURRIES
STEAM TURBINES
TRANSIENTS
CHEMICAL REACTIONS
DISPERSIONS
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MIXTURES
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