Study on the Potential and Pre-feasibility of Compressed Air Energy Storage of Abandoned Coal Mines in China

被引：0
作者：
Du J. [1 ,2 ]
Chen J. [1 ,2 ]
Jiang D. [1 ,2 ]
Fan J. [1 ,2 ]
Zhang C. [3 ]
Chen Z. [1 ,2 ]
机构：
[1] State Key Lab. of Coal Mine Disaster Dynamics and Control, Chongqing Univ., Chongqing
[2] School of Resources and Safety Eng., Chongqing Univ., Chongqing
[3] Shendong Coal Burtai Coal Mine, National Energy Group, Ordos
来源：
Gongcheng Kexue Yu Jishu/Advanced Engineering Sciences | 2023年 / 55卷 / 01期
关键词：
air tightness; compressed air energy storage; gas storage; numerical simulation; surrounding rock permeability; thermodynamic analysis;
D O I：
10.15961/j.jsuese.202200622
中图分类号：
学科分类号：
摘要：
With the structural transformation of energy cleanliness for the reduction of the proportion of fossil energy and the increase of the proportion of “carbon-free” energy in China, the number of abandoned underground mines has increased. At the same time, wind and solar energy (WS) have been developed rapidly, but the utilization rate of resources is very low. In order to improve resource utilization and upgrading of transformation, a hybrid compressed air energy storage (CAES) system combining wind power and solar energy is proposed, and the abandoned underground mines are used as energy storage space of compressed air. Firstly, according to the solar power, wind energy, underground space resources of abandoned coal mine and distribution characteristics of power grid, the potential area for the establishment of WS–CAES hybrid system are obtained, which are mainly distributed in the “three north” zones. Then, the mathematical model of system parameters such as compressor, expander, heat exchanger and air storage chamber are established. The operating variables of system include heat exchanger effective-ness, ambient temperature, mass flow rate, total pressure ratio and compressor/turbine stages. The performance effect of these operating variables on the system performance and total efficiency was evaluated. Finally, in view of the feasibility of storing high-pressure gas in the roadway of the abandoned coal mine, the numerical calculation and analysis with the Comsol software is carried out from the aspects of the depth of the roadway, the permeability of the lining and the surrounding rock. The results show that the depth of the roadway has no obvious effect on the leakage of the stored gas in the system, and the roadway lining mainly plays an important role in the stability of the system, while the permeability of the surrounding rock is the key factor determining the air tightness of the system. The smaller the permeability of surrounding rock, the smaller the gas leakage and the better the air tightness, and the underground main ventilation lane and the transportation lane have the ability to store compressed air. © 2023 Editorial Department of Journal of Sichuan University. All rights reserved.
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页码：253 / 264
页数：11
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