Numerical and experimental investigations of concrete lined compressed air energy storage system

压缩空气储能 钢筋 材料科学 热交换器 储能 岩土工程 变形(气象学) 压缩空气 工程类 复合材料 机械工程 热力学 功率(物理) 物理
作者
Peng Li,Huan Kang,Qing Zhu,Yang Wu,Jing Zhang,Liyang Fan,Zhi Wang
出处
期刊:Journal of Cleaner Production [Elsevier BV]
卷期号:390: 136153-136153 被引量:13
标识
DOI:10.1016/j.jclepro.2023.136153
摘要

Compressed air energy storage (CAES) is considered one of the critical technological approaches to bridging the gaps between clean electricity production and electricity demand. An in-situ air storage test in a shallow buried underground cavern was introduced to understand better the connection and mutual influence between aerothermodynamics and cavern safety stability in various aspects of CAES. Moreover, a corresponding finite element model of the multilayer cavity structure considering the multi-field coupling effect and rebar embedding was developed to verify the experimental results. The experimentally measured temperature, air pressure, displacement, and stress are in good agreement with the calculated results, showing the success of the modeling in this paper. The cavern temperature shows large fluctuations for the whole storage phase. The maximum temperature of the air and the cavern walls are 53 °C and 46 °C, respectively. After water circulation heat exchange, the temperature can be regulated within a reasonable range (<40 °C). The cavity walls can reverse the heat output of the air through heat exchange during the discharging phase resulting in a slower temperature drop. The concrete stress is about 1/10 of the reinforcement stress, showing that the deformation between the rebar and concrete is coordinated, and both are in the elastic deformation stage. The sealing layer, reinforced concrete lining, and rock surrounding share the internal air pressure, accounting for 2.07%, 27.55%, and 70.38%, respectively. The surrounding rock is the most important part of bearing the internal pressure, and it is an essential means to improve the safety of the cavity by carrying out anchoring and grouting of the surrounding rock. The thermodynamic processes and stress response are affected by the convection heat transfer coefficient, thermal conductivity, charging time, and leakage rate.
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