STUDY ON THERMAL-MECHANICAL CONUPLING CHARACTERISTICS OF HIGH-TEMPERATURE MOLTEN SALT STORAGE TANKS

Ling Xiao; Xin Yueying; Guo Kai; Zhang Xuewen

doi:10.19912/j.0254-0096.tynxb.2025-0810

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 534-541. DOI: 10.19912/j.0254-0096.tynxb.2025-0810

STUDY ON THERMAL-MECHANICAL CONUPLING CHARACTERISTICS OF HIGH-TEMPERATURE MOLTEN SALT STORAGE TANKS

Ling Xiao¹, Xin Yueying¹, Guo Kai¹, Zhang Xuewen²

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Abstract

Taking the molten salt storage tank in tower solar thermal power generation as the research object, the mechanical performance of molten salt storage tanks at different liquid levels under combined load conditions such as wind load with circumferential wind pressure distribution is studied through numerical simulation, and ratchet failure and creep-fatigue assessment are carried out based on the ASME standard of the United States. The results show that under a variety of load combination conditions, the maximum stress intensity is at the large fillet weld at high liquid level （11.7 and 9.0 m）, and at the geometric discontinuity between tank top and tank wall at medium and low liquid level （6.0, 3.0 and 1.0 m）. The radial displacement is asymmetrical due to the circumferential wind load, seismic response and hydraulic action, and the radial displacement is significantly affected by the change of liquid level, the radial displacement is mainly concentrated in the tank wall of the windward side of 0°-90°, and the severe area affected by the axial displacement is in the center of the tank roof. No ratchet failure occurs at different liquid levels, and no creep-fatigue failure occurs at full-load operating conditions.

Key words

solar thermal power generation stress / displacement / molten salt storage tanks / preheat / creep-fatigue

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Ling Xiao, Xin Yueying, Guo Kai, Zhang Xuewen. STUDY ON THERMAL-MECHANICAL CONUPLING CHARACTERISTICS OF HIGH-TEMPERATURE MOLTEN SALT STORAGE TANKS[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 534-541 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0810

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