探头热容对瞬态平面热源法测量轻质保温材料导热影响研究

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探头热容对瞬态平面热源法测量轻质保温材料导热影响研究
Modified Calculation Model of TPS Method Measuring Thermal Conductivity

DOI: 10.12677/MS.2020.1011103, PDF, 下载: 335 浏览: 502
作者: 林永钢, 尚福强, 吴得卿：中电建路桥集团有限公司，北京；杜晨冉, 刘志颖, 李辉：清华大学热科学与动力工程教育部重点实验室，北京；安雪晖^*：清华大学水沙科学与水利水电工程国家重点实验室，北京
关键词: 瞬态平面热源法；热导率；模型修正；TPS； Thermal Conductivity； Modified Calculation Model

摘要: 瞬态平面热源法广泛用于材料热导率测量，但轻质保温材料的热容量很小，测试时探头热容量会引起一定的误差。本文通过数值模拟定量研究了探头热容对不同热容保温材料的影响，分析了这项误差的大小，结果表明，密度小于100 kg/m3的保温材料，其热容影响导致的误差大于20%，在测量导热系数时必须采用修正热容的计算模型。

Abstract: The transient plane heat source method is widely used as a method for measuring the thermal conductivity of materials. However, the probe thermal capacity will cause certain errors for light-weight insulation materials. In this paper, numerical simulation is used to quantitatively study the influence of the probe heat capacity on insulation materials with different heat capacity. The result shows that when density is less than 100 kg/m3, the error caused by probe capacity is greater than 10%, so the calculation model with heat capacity correction must be used when measuring the thermal conductivity of light-weight insulation materials.

文章引用：林永钢, 尚福强, 吴得卿, 杜晨冉, 刘志颖, 李辉, 安雪晖. 探头热容对瞬态平面热源法测量轻质保温材料导热影响研究[J]. 材料科学, 2020, 10(11): 858-864. https://doi.org/10.12677/MS.2020.1011103

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