Experimental Investigation and X-Ray Computed Microtomography Simulation on Thermal Physical Properties of Foundation Materials after Molten Salt Leakage in the Storage Tank

  • WANG Zhaowen ,
  • ZHOU Hao ,
  • LUO Jiawei ,
  • LI Yawei ,
  • FANG Hao ,
  • LIU Tianxiao
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  • State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China

Online published: 2024-03-07

Supported by

This work was supported by the National Natural Science Foundation of China (52036008). 

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Abstract

This paper studied the thermal physical properties of foundation materials in the molten salt tank of thermal energy storage system after molten salt leakage by Transient plane source experiment and X-ray computed microtomography simulation methods. The microstructure, thermal properties and pressure resistance with different particle diameters were addressed. The measured heat conductivities from Transient plane source experiment for three cases are 0.49 W/(m∙K), 0.48 W/(m∙K), and 0.51 W/(m∙K), and the porosity is 30.1%, 30.7%, and 31.2% respectively. The heat conductivity simulating results of three cases are 0.471 W/(m∙K), 0.482 W/(m∙K), and 0.513 W/(m∙K). The ratio of difference between the results of simulation and Transient plane source measurement is as low as 1.2%, verifying the reliability of experimental and simulation results to a certain degree. Compared with the heat conductivity of 0.097–0.129 W/(m∙K) and porosity of 71.6%–78.9% without leaking salt, the porosity is reduced by more than 50% while the heat conductivity increased by 4 to 5 times after molten salt leakage. This significant increase in heat conductivity has a great impact on security operation, structure design, and modeling of the tank foundation for solar power plants.

Cite this article

WANG Zhaowen , ZHOU Hao , LUO Jiawei , LI Yawei , FANG Hao , LIU Tianxiao . Experimental Investigation and X-Ray Computed Microtomography Simulation on Thermal Physical Properties of Foundation Materials after Molten Salt Leakage in the Storage Tank[J]. Journal of Thermal Science, 2024 , 33(2) : 591 -601 . DOI: 10.1007/s11630-023-1915-7

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