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CLC number: TH71

On-line Access: 2021-12-15

Received: 2021-01-06

Revision Accepted: 2021-05-29

Crosschecked: 2021-12-05

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Citations:  Bibtex RefMan EndNote GB/T7714


Hao Zhou


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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, 2021, 22(3): 979-991.

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author="Hua Shi, Hao Zhou, Peng-nan Ma, Jian-kang Wang, Hao Fang, Jia-wei Luo, Kun-zan Qiu",
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publisher="Zhejiang University Press & Springer",

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%T Experimental investigation of migration and solidification of molten salt leaking through tank cracks
%A Hua Shi
%A Hao Zhou
%A Peng-nan Ma
%A Jian-kang Wang
%A Hao Fang
%A Jia-wei Luo
%A Kun-zan Qiu
%J Journal of Zhejiang University SCIENCE A
%V 22
%N 12
%P 979-991
%@ 1673-565X
%D 2021
%I Zhejiang University Press & Springer

T1 - Experimental investigation of migration and solidification of molten salt leaking through tank cracks
A1 - Hua Shi
A1 - Hao Zhou
A1 - Peng-nan Ma
A1 - Jian-kang Wang
A1 - Hao Fang
A1 - Jia-wei Luo
A1 - Kun-zan Qiu
J0 - Journal of Zhejiang University Science A
VL - 22
IS - 12
SP - 979
EP - 991
%@ 1673-565X
Y1 - 2021
PB - Zhejiang University Press & Springer
ER -

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 are 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 migration depth, but directly affect the shape of the agglomeration of solidified salt and porous foundation material. The most important factor affecting the migration depth of molten salt leaking through cracks is the tank operating temperature. The molten salt migration 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 migration width increased by 23.6%, but the migration 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.


创新点:1. 搭建模拟储罐熔盐泄漏的热态试验装置;2. 研究缝隙长度和宽度对熔盐泄漏和迁移的影响.
方法:1. 通过自行搭建的熔盐泄漏热态试验装置,研究熔盐运行温度、缝隙长度、缝隙宽度和泄漏熔盐质量对熔盐在地基中的迁移和凝固的影响; 2. 通过理论分析,解释泄漏事故后地基材料的热稳定温度随泄漏熔盐质量的增加而升高的具体原因.
结论:1. 当缝隙宽度为3~10 mm和缝隙长度为5~30 mm时,熔盐渗流深度和平均渗流宽度均变化不大,但熔盐在地基材料上部的渗流宽度会随缝隙尺寸的增大而明显增大.2. 当熔盐通过缝隙泄漏在地基材料中时,储罐的运行温度是影响熔盐渗流深度的最重要因素.3. 泄漏熔盐质量在一定范围内的增加对熔盐渗流深度影响不大;渗流宽度会随熔盐质量的增大而增大;泄漏事故后地基材料的热稳定温度随泄漏熔盐质量的增加而升高.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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