Abstract
To solve the fluctuation and instability of renewable energy, a large-scale energy storage technology is considered to be an effective way. Due to the merits of large energy storage scale and long storage period, compressed air energy storage has attracted extensive attention and research. The working principle and advantages as well as research status of compressed air energy storage in aquifers are discussed. The key problems of economic cost, reservoir property, wellbore structure design, caprock safety and injection-production scheme design of compressed air energy storage in aquifers are also analyzed. Furthermore, the shortcomings in the current research of compressed air energy storage in aquifers at the present stage are summarized. Finally, proposed more indoor experiments and pilot tests of actual sites are needed in future research.
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