Thermodynamic behavior of compressed air energy storage systems

Technical Report · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6069878

Marinacci, D J

The results of thermodynamic performance analyses that were conducted for several Compressed Air Energy Storage (CAES) systems (base, recuperator, and thermal energy storage) are presented and discussed. The analyses presented involved the operation of the WVU CAES computer program model, which is available to potential users, over a wide range of operating conditions which also served as a check on the validity of the model. The first step in the performance assessment study was the optimization analysis. Padgett's SHOP program was used to determine the operating values for the CAES systems which would produce the maximum possible CAES cycle efficiency within the imposed physical limitations. Once the optimum values were determined, selected operating conditions were then independently varied; while the remaining terms were each held at their optimum value during a parametric study. A parametric study was performed for each of the important operating conditions to determine their relative effect on the CAES cycle efficiency and heat rate. Since their effect on the CAES cycle efficiency was significant, parametric studies were performed for each of the three CAES systems modeled with the WVU CAES computer model for the following variables: the LP compressor pressure ratio, RCA; the initial HP compressor pressure ratio, RCCT; the HP compressor discharge pressure, P4; the HP turbine pressure ratio, 1/EXPA1; the LP turbine pressure ratio, 1/EXPA2; the aftercooler discharge temperature, T5; the HP turbine inlet temperature, T10; and the LP turbine inlet temperature, T12. General comments are also given on the advantages and disadvantages of the recuperator and the heat storage systems with respect to the base CAES power cycle. Recommendations for the most thermodynamic efficient design of CAES power plants are given. (WHK)

• Research Organization: West Virginia Univ., Morgantown (USA)
• DOE Contract Number: AS05-76OR90337
• OSTI ID: 6069878
• Report Number(s): DOE/OR/90337-T1; ON: DE81030349
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250200* -- Energy Storage-- Compressed & Liquified Gas
COMPRESSED AIR ENERGY STORAGE EQUIPMENT
COMPUTER CALCULATIONS
EFFICIENCY
EQUIPMENT
FLOW RATE
GAS TURBINES
MACHINERY
OPTIMIZATION
PARAMETRIC ANALYSIS
PERFORMANCE
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
THERMODYNAMICS
TURBINES
TURBOMACHINERY