The basic design concept and method of a shallow rock cavern of a compressed air energy-storage power station

doi:10.19799/j.cnki.2095-4239.2024.0219

Abstract

Abstract:

Pumped storage power stations and new energy storage are essential technologies for peaking carbon emissions and achieving carbon neutrality, supporting the development of new energy power networks. Compressed air energy storage (CAES) uses compressed air to store energy and generate electricity. It is currently the most significant physical energy-storage method apart from pumped storage power stations. Hard rock shallow-buried CAESs, with flexible site selection in artificial air-storage caverns, have the potential for large-scale and commercial development. Considering the situation and requirements for developing and constructing large and medium-sized CAESs in China, combined with relevant research and practical experience, the basic design concept for the overall, local, cycling, and sealing stability of shallow-buried artificial air-storage caverns under hard rock conditions is proposed. The requirements for site selection and geological exploration requirements, burial-depth design, storage cavern layout, structural design, and sealing system design method are summarized. This study would provide reference and guidance for designing shallow-buried artificial air-storage caverns in compressed air energy-storage power stations.

Key words: CAES, shallow-buried artificial air-storage cavern, stability, design concept, basic method

CLC Number:

TM 91

Quansheng ZHAO, Ling ZHU, Yaowu LIU, Jungang HAO, Mingxin WU. The basic design concept and method of a shallow rock cavern of a compressed air energy-storage power station[J]. Energy Storage Science and Technology, 2024, 13(8): 2775-2784.

Figures/Tables 9

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技术特征	压缩天然气储存地下储气库	压缩空气储能地下储气洞库	抽水蓄能工程压力钢管
使用寿命/年	≥30	≥30	≥50
储存介质	天然气	空气	水
内径范围/m	35～45 (一般为大罐式，高60～100 m)	5～12 (多为隧洞式布置，形式多样)	3～8 (多为数条隧洞平行布置)
内压范围/MPa	3～25	4～12	0～8
加卸载频率/(次/年)	1～20	350～700	—
加卸载速率	可控	可控	不可控
钢衬厚度/mm	10～15	25～60^①	25～75

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