Thermodynamic model and exergy analysis of cryogenic liquefied air energy storage system

被引：0
|
作者：
He Q. [1 ]
Wang L. [1 ]
Liu W. [1 ]
机构：
[1] School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2018年 / 46卷 / 10期
关键词：
Cryogenic liquefied air energy storage system; Exergy analysis model; Exergy-loss analysis; Sensitivity analysis; Thermodynamic model;
D O I：
10.13245/j.hust.181022
中图分类号：
学科分类号：
摘要：
In order to solve the problem that the traditional gaseous air energy storage system is based on large-scale air storage room, and promote the in-depth study of liquid air energy storage technology, thermodynamic model and exergy analysis model of the liquefied air energy storage system were established, and thermodynamic analysis and sensitivity analysis were carried out. Analysis results show that energy storage density of the LAES system reaches to 3.456×10 8 J/m 3 , which is 10 to 12 times of the energy storage density of advanced adiabatic compressed air energy storage system, and the system's cycle efficiency is 60.31%, slightly lower than the advanced adiabatic compressed air energy storage system. During the working of the LAES system, the exergy loss of the air compression and expansion processes is larger as well as the process of cold storage. The exergy efficiency of the LAES system increases with the adiabatic efficiency of the compressor and expander as well as its mechanical efficiency. Therefore, the goal of improving the efficiency of the LAES system by increasing the adiabatic efficiency and mechanical efficiency of the compressor and the expander can be achieved. © 2018, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
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页码：127 / 132
页数：5
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