Analysis of integrating compressed air energy storage concepts with coal gasification/combined-cycle systems for continuous power production

Technical Report · Tue Dec 01 04:00:00 EST 1992

OSTI ID:7046071

Nakhamkin, M; Patel, M; Andersson, L ^[1]

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1. Energy Storage and Power Consultants, Inc., Mountainside, NJ (United States)

A previous study sponsored by EPRI concluded that integrating a compressed-air energy storage (CAES) plant with a coal-gasification system (CGS) can reduce the required capacity and cost of the expensive gasification system. The results showed that when compared at an equal plant capacity, the capital cost of the CGS portion of the integrated CAES/CGS plant can be reduced by as much as 30% relative to the same portion of an integrated gasification combined cycle (IGCC) plant. Furthermore, the capital cost of the CAES/CGS.plant, configured as a peaking unit, was found to be slightly lower than that of the base-load IGCC plant. However, the overall economics of the CAES/CGS plant were adversely affected by the low capacity factor of the peak-load service, and ultimately, were found to be less attractive than the IGCC plant. The main objective of this study was to develop and analyze integrated CAES/CGS power plant concepts which provide for continuous (around-the-clock) operation of both the CAES reheat turboexpander train and the CGS facility. The developed concepts also provide utility-load management functions by driving the CAES compressor trains with off-peak electricity supplied through the grid. EPRI contracted with Energy Storage Power Consultants, Inc. (ESPC) to develop conceptual designs, optimized performance characteristics, and preliminary cost data for these CAES/CGS concepts, and to provide a technical and cost comparison to the IGCC plant. The CAES/CGS concepts developed by ESPC for the current study contrast from those of Reference 1.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Energy Storage and Power Consultants, Inc., Mountainside, NJ (United States)
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 7046071
• Report Number(s): EPRI-TR-100274
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
25 ENERGY STORAGE
250200 -- Energy Storage-- Compressed & Liquified Gas
CAPITALIZED COST
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
COMPRESSED AIR ENERGY STORAGE
COST
DESIGN
ELECTRIC POWER
ENERGY STORAGE
EPRI
GASIFICATION
POWER
POWER PLANTS
STORAGE
SYSTEMS ANALYSIS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES