Optimal Design of Air Compressor Set for 500k W Adiabatic CAES

Adiabatic Compressed Air Energy Storage(ACAES) system is an effective grid controlling technique. As the input port of whole system, the air compressor set directly affects the system efficiency, also its exhaust temperature has greater influence on the regenerative cycle and the high efficient operating of turbine. Taking the factors such as low energy consumption and high exhaust temperature into consideration, the compressor set of an ACAES project was designed and optimized in this paper. An operation scheme has been made in which multistage compressor would run with segments depending on the difference of backpressure. Conse-quently, the efficiency of whole system would risen by 26.2%.