Optimization and Design of the Liquefied Air Energy Storage System

被引：0
|
作者：
He Q. [1 ]
Wang L. [1 ]
Hao Y. [1 ]
Liu W. [1 ]
机构：
[1] School of Energy Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 15期
基金：
国家重点研发计划;
关键词：
Adiabatic efficiency; Liquefied air energy storage system; Mathematical model; Scheme design; System optimization;
D O I：
10.13334/j.0258-8013.pcsee.180986
中图分类号：
学科分类号：
摘要：
According to its mathematical model of each link of the liquefied air energy storage system, thermodynamic analysis and optimization of parameters were carried out in this paper. The four-stage compressor unit and the four-stage expansion unit were selected as the energy storage and energy release links of the system, respectively. And according to the liquefaction link, the energy storage pressure and energy release pressure of the system were determined to be 1.5× 104kPa and 7.1×103kPa, respectively. The design scheme of a 10MW liquefied air energy storage system was established based on the optimization results. Finally, the thermodynamics of the design system was studied and the results show that for every 5% increase in the adiabatic efficiency of the system compressor and expansion units, the cycle efficiency increases by an average of 5.5% and the air flow decreases by an average of 0.99 kg/s. It can be concluded that under the condition that the rated power of the liquefied air energy storage system is maintained, with the increase of the adiabatic efficiency of the units, the cycle efficiency of the system is gradually increased, and the air flow for expansion work is gradually reduced, which is more conducive to the system using less air to store more power. © 2019 Chin. Soc. for Elec. Eng.
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页码：4478 / 4486
页数：8
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