Efficient utilization of abandoned mines for isobaric compressed air energy storage

Xianbiao Bu, Sihao Huang, Shi Liu, Yi Yang, Jie Shu, Xianfeng Tan, Hongnian Chen and Guiling Wang

Energy, 2024, vol. 311, issue C

Abstract: There are massive abandoned coalmines and corresponding underground space, which provides a viable solution to energy storage of renewable energy generation. Here a novel scheme of isobaric compressed air energy storage (CAES) is proposed to improve the performance of energy storage in underground space. Energy recovery efficiency and energy storage density of isobaric CAES are respectively 70.60 % and 5.74 kWh/m3, while they are 70.56 %, 1.14 kWh/m3 and 60.19 %, 2.46 kWh/m3 respectively for pumped hydro storage and isochoric CAES. Abandoned mining fields can install photovoltaic and wind power, while underground tunnels can storage energy, transforming abandoned mines into a renewable energy support base with electricity generation and storage integrated into a site. Electrical energy with low frequency and high frequency in the base can all be used by driving compressors and heaters respectively. Besides, isobaric CAES can provide space heating and cooling simultaneously through using interstage compression heat and expanding refrigeration technique.

Keywords: Isobaric compressed air energy storage; Underground space energy storage; Abandoned mines energy storage; Combined heating and power system (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:311:y:2024:i:c:s0360544224031682

DOI: 10.1016/j.energy.2024.133392

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