An improved laser flash method for thermal conductivity measurement of molten salts

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外文摘要：Thermal conductivity measurement of high-temperature heat transfer fluids provides a crucial basis for designing utility-scale thermal systems.Molten salts are promising heat transfer and thermal storage fluids in high-temperature thermal energy storage systems,while the molten salt thermal conductivity obtained in existing studies exhibits large deviations due to the high experimental complexity and unstandardized test procedures.In this work,we improve the conventional laser flash analysis method by proposing a theoretical heat transfer model for multi-layer heat conduction and providing a near-optimal molten salt container design.With water as a test sample,the relative error of thermal conductivity measurement using the improved method is 6.3%.The thermal conductivity of Solar Salt from 250 to 400 C,and of Hitec Salt from 160 to 250 C are measured and compared with the previous work.Both results show that the thermal conductivity increases with the temperature rising.This work will promote the technology standardization for accurately acquiring the thermal conductivity of molten salts or other similar high-temperature heat transfer fluids.

外文关键词：

Laser flash analysisThermal conductivityThermal energy storageMolten saltMulti-layer heat conduction

作者：

Shiyan Dong、Mingzhen Zhang、Kaiyuan Jin、Ronggui Yang

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作者单位：

State Key Laboratory of Coal Combustion,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,Hubei,430074,China

基金：

National Natural Science Foundation of ChinaFoundation of State Key Laboratory of Coal CombustionNatural Science Foundation of Hubei ProvinceKnowledge Innovation Special Foundation of Wuhan

项目编号：

52306084FSKLCCB23012023AFB17720232038

出版年：

2024

DOI：

10.1016/j.pnsc.2024.03.006

自然科学进展·国际材料(英文)

国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25

ISSN：1002-0071

年,卷(期)：2024.34(2)

参考文献量34