Thermodynamic analysis of compressed air storage in a underground rock cavern considering the influence of compression factor

doi:10.12028/j.issn.2095-4239.2018.0041

Abstract

Abstract: Thermodynamic analyses are performed to investigate the influence of varying air compression factor on compressed air storage in a underground rock cavern. Experimental data are used to validate four compression factor calculation methods. The results indicate that the temperature and pressure of compressed air are significantly influenced by the variation of the compression factor. Under cyclic charging and discharging processes, the compression factor, the temperature and the pressure of compressed air increase with increasing charging and discharging times, and eventually show a stablised trend. The calculated compressed air temperature is more sensitive than that of compressed air pressure when the compression factor is considered. The ideal gas assumption can lead to a large errors.

Key words: compressed air energy storage, underground rock cavern, thermodynamic process, compression factor

CLC Number:

TU311.3

JIANG Zhongming, LIU Liyuan, HU Wei, MEI Songhua, LI Peng. Thermodynamic analysis of compressed air storage in a underground rock cavern considering the influence of compression factor[J]. Energy Storage Science and Technology, 2018, 7(5): 902-907.

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