A comparison of compressed carbon dioxide energy storage and compressed air energy storage in aquifers using numerical methods

Yi Li, Hao Yu, Dong Tang, Yi Li, Guijin Zhang and Yaning Liu

Renewable Energy, 2022, vol. 187, issue C, 1130-1153

Abstract: Developing large-scale energy storage technologies has been considered as an indispensable approach to mitigating the impacts of grid integration of huge solar and wind energy. Compressed carbon dioxide energy storage in aquifers (CCESA) was recently presented and is capturing more attention following the development of compressed air energy storage in aquifers (CAESA). To quantitatively study the similarities and differences of CCESA and CAESA by numerical methods, the same geological, structural and operational conditions are designed to ensure unbiased analysis and reliable results. The results show that CCESA absorbs heat from the surroundings, while CAESA continuously loses heat. The reservoir pressure of CCESA is 1.91 MPa lower than that of CAESA, and as a result, CCESA has a lower cracking risk. The CO2 and air respectively transport to 167 m and 487 m away in aquifers within 200 days, indicating that CCESA requires only 11.8% of the floor space of CAESA. The gas production mass fraction of CCESA is 38.81% higher than that of CAESA. The daily energy efficiency of CCESA increases, while that of CAESA decreases. The average energy efficiency of CCESA is 20.15% higher than that of CAESA. It can be concluded that CCESA can be the better choice when the CO2 source nearby is sufficient.

Keywords: Energy storage; Compressed CO2; Compressed air; Aquifer; Energy efficiency; Numerical study (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:187:y:2022:i:c:p:1130-1153

DOI: 10.1016/j.renene.2022.02.036

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