Retrofit and Analysis of Recuperative A-CAES System

doi:10.11930/j.issn.1004-9649.2016.07.090.06

Abstract

Abstract: To cut down the cost of thermal energy storage(TES) medium, the heating compressor is appended to the mineral oil-based adiabatic compressed air energy storage(A-CAES ) system to lower the TES temperature. Furthermore, a novel compressed air energy storage (CAES) system for combined cool, heat and power (CCHP) taking water as the TES medium is proposed. The thermodynamic model of the system is then established such that the thermodynamic calculations are conducted for two systems under designed operation conditions. In particular, the CCHP system performance parameters are computed and compared with the variation of heating pressure ratio (2.4~3.8) and heat exchanger efficiency(0.6~0.9) respectively. The results show that the TES temperature of the CCHP system is significantly reduced with the new water-based TES medium. Compared with the original system, the thermal efficiency and exergy efficiency are improved by about 14% and 2.6% respectively, while the ER remains almost unchanged. In addition, the impact of heating pressure ratio on system performance and exergy losses of the equipments is very minimum while the effectiveness shows significant impacts on system efficiency and exergy losses.

Key words: compressed air energy storage (CAES), CCHP, thermodynamic model, thermodynamic method

CLC Number:

TK02

HAN Zhonghe, LIU Shiming, ZHOU Quan, PANG Yongchao. Retrofit and Analysis of Recuperative A-CAES System[J]. Electric Power, 2016, 49(7): 90-95.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.07.090.06

https://www.electricpower.com.cn/EN/Y2016/V49/I7/90

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