DESIGN AND ANALYSIS OF HIGH TEMPERATURE MOLTEN-SALT STORAGE TANK UNDER CYCLIC LOADING

Cai Jun; Liu Changjun; Guo Hongxing; Tan Jianping; Zeng Xin; Ye Dongting

doi:10.19912/j.0254-0096.tynxb.2021-1540

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (4) : 516-521. DOI: 10.19912/j.0254-0096.tynxb.2021-1540

DESIGN AND ANALYSIS OF HIGH TEMPERATURE MOLTEN-SALT STORAGE TANK UNDER CYCLIC LOADING

Cai Jun¹, Liu Changjun¹, Guo Hongxing¹, Tan Jianping¹, Zeng Xin¹, Ye Dongting²

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Abstract

Taking a high temperature molten-salt storage tank of a large-scale solar thermal power tower station as the research object and according to results of transient thermal-mechanical stress analysis, ratchetting failure and creep-fatigue failure of the storage tank are evaluated based on ASME code. The results show that ratchetting failure of the storage tank will not occur under normal and abnormal conditions. Compared to ratchetting strain of structure under normal condition, the strain under abnormal condition increases by 72%, due to the temperature difference （165 ℃） on the wall of tank. Storage tank will occur creep-fatigue failure under abnormal condition and the value of creep damage and fatigue damage increase by 1.4 times and 9 times respectively compared with normal condition which does not fail. It is suggested that a molten-salt buffer tank is recommended to reduce the hazard to structure caused by temperature fluctuation of molten salt.

Key words

solar energy / thermal energy storage / finite element method / creep-fatigue / ratchetting

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Cai Jun, Liu Changjun, Guo Hongxing, Tan Jianping, Zeng Xin, Ye Dongting. DESIGN AND ANALYSIS OF HIGH TEMPERATURE MOLTEN-SALT STORAGE TANK UNDER CYCLIC LOADING[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 516-521 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1540

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