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A new shape design method of salt cavern used as underground gas storage

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  • Wang, Tongtao
  • Yan, Xiangzhen
  • Yang, Henglin
  • Yang, Xiujuan
  • Jiang, Tingting
  • Zhao, Shuai

Abstract

A new model used to design the shape and dimension of salt cavern gas storage is proposed in the paper. In the new model, the cavern is divided into two parts, namely the lower and upper structures, to design. The concepts of slope instability and pressure arch are introduced into the shape design of the lower and upper structures respectively. Calculating models are established according to the concepts. Field salt cavern gas storage in China is simulated as examples, and its shape and dimension are proposed. The effects of gas pressure, friction angle and cohesion of rock salt on the cavern stability are discussed. Moreover, the volume convergence, displacement, plastic volume rate, safety factor, and effective strain are compared with that of three other existing shapes salt caverns to validate the performance of newly proposed cavern. The results show that the max. gas pressure determines the shape and dimension of cavern lower structure, while the min. gas pressure decides that of cavern upper structure. With the increase of friction angle and cohesion of rock salt, the stability of salt cavern is increased. The newly proposed salt cavern gas storage has more notable advantages than the existing shapes of salt cavern in volume convergence, displacement, plastic volume rate, safety factor, and effective strain under the same conditions.

Suggested Citation

  • Wang, Tongtao & Yan, Xiangzhen & Yang, Henglin & Yang, Xiujuan & Jiang, Tingting & Zhao, Shuai, 2013. "A new shape design method of salt cavern used as underground gas storage," Applied Energy, Elsevier, vol. 104(C), pages 50-61.
    • Handle: RePEc:eee:appene:v:104:y:2013:i:c:p:50-61
    DOI: 10.1016/j.apenergy.2012.11.037
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    References listed on IDEAS

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    1. Kim, Hyung-Mok & Rutqvist, Jonny & Ryu, Dong-Woo & Choi, Byung-Hee & Sunwoo, Choon & Song, Won-Kyong, 2012. "Exploring the concept of compressed air energy storage (CAES) in lined rock caverns at shallow depth: A modeling study of air tightness and energy balance," Applied Energy, Elsevier, vol. 92(C), pages 653-667.
    2. Slizowski, J. & Lankof, L., 2003. "Salt-mudstones and rock-salt suitabilities for radioactive-waste storage systems: rheological properties," Applied Energy, Elsevier, vol. 75(1-2), pages 137-144, May.
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