Design and thermodynamic analysis of compressed air energy storage system

doi:10.3969/j.issn.2095-4239.2013.06.009

Abstract

Abstract: Compressed air energy storage (CAES) has the potential to improve the quality of renewable electricity from wind and solar energy. Using such a technology, the intermittent renewable electricity can be stored at off peak hours, and released in a steady manner at peak time of electricity grid. This paper considers a CAES system for an electricity storage capacity of 56.58 MW and an output capacity of 154.76 MW. For the selection of turbines for the energy release step, reference is made to the second stage turbine of the GE 9171E configuration. Flue gas temperature of the second stage turbine could reach 812.41 K to satisfy the heat supply requirement for heating the compressed air before entering the first stage turbine. As a result, the high pressure combustor for the first turbine could be removed from the system. The heat consumption for the CAES system could be as low as 3783.96 kJ/(kW·h) and the system energy conversion efficiency could reach 56.11%.

Key words: renewable electricity, compressed air energy storage (CAES), multi-stage compression, waste heat recovery

CLC Number:

TK82

DENG Guangyi, GUO Zuogang, CHEN Guangming. Design and thermodynamic analysis of compressed air energy storage system[J]. Energy Storage Science and Technology, 2013, 2(6): 615-619.

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