Use of circulating-fluidized-bed combustors in compressed-air energy storage systems
- Energy Storage and Power Consultants, Mountainside, NJ (USA)
This report presents the result of a study conducted by Energy Storage and Power Consultants (ESPC), with the objective to develop and analyze compressed air energy storage (CAES) power plant concepts which utilize coal-fired circulating fluidized bed combustors (CFBC) for heating air during generating periods. The use of a coal-fired CFBC unit for indirect heating of the compressed air, in lieu of the current turbomachinery combustors, would eliminate the need for expensive premium fuels by a CAES facility. The CAES plant generation heat rate is approximately one-half of that for a conventional steam condensing power plant. Therefore, the required CFBC heat generation capacity and capital costs would be lower per kW of power generation capacity. Three CAES/CFBC concepts were identified as the most promising, and were optimized using specifically developed computerized procedures. These concepts utilize various configurations of reheat turbomachinery trains specifically developed for CAES application as parts of the integrated CAES/CFBC plant concepts. The project team concluded that the optimized CAES/CFBC integrated plant concepts present a potentially attractive alternative to conventional steam generation power plants using CFBC or pulverized coal-fired boilers. A comparison of the results from the economic analysis performed on three concepts suggests that one of them (Concept 3) is the preferred concept. This concept has a two shaft turbomachinery train arrangement, and provides for load management functions by the compressor-electric motor train, and continuous base load operation of the turboexpander-electric generator train and the CFBC unit. 6 refs., 30 figs., 14 tabs.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA); Energy Storage and Power Consultants, Mountainside, NJ (USA)
- Sponsoring Organization:
- EPRI
- OSTI ID:
- 6737028
- Report Number(s):
- EPRI-GS-6905
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPRESSED AIR ENERGY STORAGE
FOSSIL-FUEL POWER PLANTS
COMPARATIVE EVALUATIONS
ECONOMIC ANALYSIS
FLUIDIZED-BED COMBUSTION
HEAT TRANSFER
LOAD MANAGEMENT
OFF-PEAK ENERGY STORAGE
PERFORMANCE
TECHNOLOGY ASSESSMENT
THERMODYNAMICS
TURBOMACHINERY
UNDERGROUND STORAGE
CHEMICAL REACTIONS
COMBUSTION
ECONOMICS
ENERGY STORAGE
ENERGY TRANSFER
MACHINERY
MANAGEMENT
OXIDATION
POWER PLANTS
STORAGE
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
200107* - Fossil-Fueled Power Plants- Off-Peak Energy Storage- (1980-)