Technical and economic assessment of fluidized-bed-augmented compressed-air energy-storage system. Volume I. Executive summary
An energy storage system which could be attractive for future electric utility peak-load applications is a modified gas turbine power system utilizing underground storage of very high pressure air. The compressed air energy storage (CAES) concept involves using off-peak electricity generated from indigenous coal or nuclear sources to compress air, storing the air in large underground facilities, and withdrawing the air during peak-load periods when it would be heated by combustion and expanded through gas turbines to generate power. The attractiveness of the CAES concept is based upon its potential to supply competitively priced peaking energy, to reduce peak-load power plant dependence on petroleum-based fuels, and to provide a means for leveling the utility system load demand. Therefore, a technical and economic assessment of coal-fired fluidized bed (FBC) combustor/compressed air energy storage (FBC/CAES) systems was performed and is described. The conclusions drawn from the FBC/CAES study program are encouraging. They indicate that pressurized FBC/CAES power plants should be technologically feasible, provide good performance, and be economically competitive. Specifically, it is concluded that: coal-fired FBC/CAES systems should be technically feasible in the near future and potentially attractive for peak-load power generation; and an open-bed PFBC/CAES configuration would provide the best candidate for early commercialization. It has relatively low risk combined with moderate cost and reasonable round-trip heat rate. It also has the potential for future growth options which tend to reduce costs and lower fuel consumption.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); United Technologies Corp., East Hartford, CT (USA). Research Center; Acres American, Inc., Columbia, MD
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5241405
- Report Number(s):
- PNL-3686-Vol.1; UTRC-R-80-954490-20; ON: DE82001894
- Country of Publication:
- United States
- Language:
- English
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25 ENERGY STORAGE
29 ENERGY PLANNING
POLICY AND ECONOMY
COMPRESSED AIR STORAGE POWER PLANTS
ECONOMICS
FEASIBILITY STUDIES
TECHNOLOGY ASSESSMENT
GAS TURBINE POWER PLANTS
COAL
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
OFF-PEAK ENERGY STORAGE
PERFORMANCE
POWER GENERATION
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
ENERGY SOURCES
ENERGY STORAGE
FOSSIL FUELS
FUELS
MATERIALS
OXIDATION
PEAKING POWER PLANTS
POWER PLANTS
STORAGE
THERMOCHEMICAL PROCESSES
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200104 - Fossil-Fueled Power Plants- Components
290700 - Energy Planning & Policy- Transport & Storage