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Journal of Zhejiang University SCIENCE A

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Experimental investigation of migration and solidification of molten salt leaking through tank cracks


Author(s):  Hua SHI, Hao ZHOU, Peng-nan MA, Jian-kang WANG, Hao FANG, Jia-wei LUO, Kun-zan QIU

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):  zhouhao@zju.edu.cn

Key Words:  Molten salt; Leaking; Migration; Crack; Foundation material


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Hua SHI, Hao ZHOU, Peng-nan MA, Jian-kang WANG, Hao FANG, Jia-wei LUO, Kun-zan QIU. Experimental investigation of migration and solidification of molten salt leaking through tank cracks[J]. Journal of Zhejiang University Science A, 1998, -1(2): .

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author="Hua SHI, Hao ZHOU, Peng-nan MA, Jian-kang WANG, Hao FANG, Jia-wei LUO, Kun-zan QIU",
journal="Journal of Zhejiang University Science A",
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year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2100011"
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%A Hua SHI
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Abstract: 
Molten salt is often used for heat transfer and thermal energy storage in concentrated solar power. Molten salt leakage and migration is a significant issue in its application. Molten salt migration and solidification in thermal porous foundation materials through cracks is experimentally investigated. The impact of factors, including crack length and width, operation temperature, and leakage mass of molten salt, are studied through an experimental device modeling the leakage of the actual molten salt storage tank. Experimental results show that the crack width and length slightly affect the seepage depth, but directly affect the shape of the agglomeration of solidified salt and porous foundation material. The most important factor affecting the seepage depth of molten salt leaking through cracks is the tank operating temperature. The molten salt seepage depth when the operating temperature is 500 °C is 95.8% higher than that with an operating temperature of 300 °C. As the leakage molten salt mass reached 400 g, the average seepage width increased by 23.6%, but the seepage depth only increased by 5.2%. It is found that the foundation material temperatures after leakage accidents increase with an increase in the mass of leaked molten salt.

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