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

Wang, Tongtao; Yan, Xiangzhen; Yang, Huizhong; Yang, Xiujuan; Jiang, Tianxing; Zhao, Shuai

doi:10.1016/j.apenergy.2012.11.037

Cited by 129 publications

(47 citation statements)

References 25 publications

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“…Raju and Khaitan [3] developed a numerical model to simulate the mass and energy balance inside a cavern for CAES, and it was validated by the data from the Huntorf cavern operation. Wang et al [5] used 3D geomechanical simulation to validate the analytical model of UGS salt cavern shape optimizing and pointed out that numerical and analytical solutions both were useful in the designs of salt cavern. As a UGS cavern has a large depth, the field monitoring and tests become difficult, especially for the abandoned caverns.…”

Section: Introductionmentioning

confidence: 99%

“…Large scale UGS systems can effectively overcome the disadvantages associated with the gas demand fluctuation, as well as some other emergencies. They can also greatly reduce the cost in long-distance gas transmission and can provide a steady gas source [5][6][7][8][9][10]. Because of these advantages, salt cavern UGS is widely used in many countries.…”

Section: Introductionmentioning

confidence: 99%

“…They have the following advantages compared with other types of gas storage [5,[9][10]. (i) Flexibility.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility analysis of using abandoned salt caverns for large-scale underground energy storage in China

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Feasibility analysis of using abandoned salt caverns for large-scale underground energy storage in China

et al. 2015

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“…Wang et al (2013) provided a new shape design method for salt caverns used for underground gas storage. Zhang et al (2014) evaluated the stability and tightness of underground gas/ oil storage caverns based on investigation of the sedimentary rhythm of bedded rock salt formations.…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Feasibility Analysis of Compressed Air Energy Storage (CAES) in Bedded Salt Formations: a Case Study in Huai’an City, China

Zhang

Daemen

et al. 2014

Rock Mech Rock Eng

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The lower reaches of the Yangtze River is one of the most developed regions in China. It is desirable to build compressed air energy storage (CAES) power plants in this area to ensure the safety, stability, and economic operation of the power network. Geotechnical feasibility analysis was carried out for CAES in impure bedded salt formations in Huai'an City, China, located in this region. First, geological investigation revealed that the salt groups in the Zhangxing Block meet the basic geological conditions for CAES storage, even though the possible unfavorable characteristics of the salt formations include bedding and different percentages of impurities. Second, mechanical tests were carried out to determine the mechanical characteristics of the bedded salt formations. It is encouraging that the samples did not fail even when they had undergone large creep deformation. Finally, numerical simulation was performed to evaluate the stability and volume shrinkage of the CAES under the following conditions: the shape of a single cavern is that of a pear; the width of the pillar is adopted as two times the largest diameter; three regular operating patterns were adopted for two operating caverns (internal pressure 9-10.5 MPa, 10-11.5 MPa, and 11-12.5 MPa), while the other two were kept at high pressure (internal pressure 10.5, 11.5, and 12.5 MPa) as backups; an emergency operating pattern in which two operating caverns were kept at atmospheric pressure (0.1 MPa) for emergency while the backups were under operation (9-10.5 MPa), simulated for 12 months at the beginning of the 5th year. The results of the analysis for the plastic zone, displacement, and volume shrinkage support the feasibility of the construction of an underground CAES power station. KeywordsGeotechnical feasibility Á Compressed air energy storage (CAES) Á Bedded salt formations Á Mechanical experiments Á Numerical simulation Abbreviations V cavern Volume of cavern G eff Volume of working gas M air Molar mass of gas V mol Molar volume of gas at standard state V sediment Volume of sediment V sphere Volume of lower half-sphere h sediment Distance between sediment surface and the above cross-section v Withdrawal velocity t Withdrawal time N Mole number of gas R m Ideal gas constant, 8.314 J/(mol K) a Average insoluble content percentage at the location of the cavern b Expansion coefficient of sediment A max Cross-sectional area at the maximum diameter A 1 , A 2 Coefficients in virial equation A

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“…A real cavern is usually irregular in shape and contains sediments in the bottom, see cal simulation, a simplified geometry is assumed (Pudewills, 2007;Nazary et al, 2013;Wang et al, 2013). In this dissertation also the irregularities in the wall of the cavern are neglected, and as a synthetic case study, the shape of the cavity after excavation is 3 Numerical Simulation the initial stress state in rock salt formations is isotropic (Heusermann et al, 2002;Bräuer et al, 2011).…”

Section: Geometrymentioning

confidence: 99%

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

et al. 2016

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

Cited by 129 publications

References 25 publications

Feasibility analysis of using abandoned salt caverns for large-scale underground energy storage in China

Feasibility analysis of using abandoned salt caverns for large-scale underground energy storage in China

Geotechnical Feasibility Analysis of Compressed Air Energy Storage (CAES) in Bedded Salt Formations: a Case Study in Huai’an City, China

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

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