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An Analytical Solution for Analyzing the Sealing-efficiency of Compressed Air Energy Storage Caverns

  • Bin YeEmail author
  • Zirui Cheng
  • Weimin Ye
  • Yicheng Peng
Geotechnical Engineering

Abstract

Compressed Air Energy Storage (CAES) is a commercial, utility-scale technology that is suitable for providing long-duration energy storage. Underground air storage caverns are an important part of CAES. In this paper, an analytical solution for calculating air leakage and energy loss within underground caverns were proposed. Using the proposed solution, the air leakage and energy loss under a typical CAES operation pressure were analyzed, and the influences of the permeability of the concrete lining and the lining thickness on the sealing efficiency of underground caverns were investigated. The results showed that under a typical CAES operation pressure, a concrete lining with a permeability of less than 6.36 × 10−18 m2 would result in an acceptable air leakage rate of less than 1%. Air leakage will increase linearly with increasing lining permeability. Increasing the thickness of the concrete lining could enhance the sealing efficiency of the storage cavern.

Keywords

compressed air energy storage lined rock cavern sealing efficiency analytical solution air leakage energy loss 

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Copyright information

© Korean Society of Civil Engineers 2019

Authors and Affiliations

  1. 1.Dept. of Geotechnical EngineeringTongji UniversityShanghaiChina
  2. 2.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina
  3. 3.Dept. of Science and Technology InformationShanghai Electric Power Design InstituteShanghaiChina

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