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采用HOTDISK测量材料热导率的实验研究 被引量:31

EXPERIMENTAL STUDY OF THERMAL CONDUCTIVITY MEASUREMENT WITH HOTDISK
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摘要 使用HotDisk热分析仪进行材料热导率测量的实验研究。通过对不锈钢标准件,冰和多孔介质的热导率测量,证明该分析仪器能够适应不同材料的热物性测试。对冰的测量结果与文献值的最大相对误差仅为0.324%,对不锈钢标准件测量结果与标准值一致,在室温(22℃)左右为14.07W·m^(-1)·K^(-1)。对建筑用砂与空气、水和冰组成的饱和多孔介质的有效热导率测量结果表明:砂的颗粒粒径大小对材料的有效热导率影响很大,这种影响主要是接触热阻和连续相相对体积大小相互作用的结果。 By measuring the thermal conductivity of standard stainless steel, ice and construction sand porous media with HotDisk thermal constant analyzer, it indicates HotDisk could be used to measure the thermal conductivity of different forms of material. The experimental result of standard stainless steel fits well with literature, which is 14.07W·m^(-1) K^(-1) under room temperature (22℃). And the experimental results of ice only have a maximal relative error 0.324 per cent. The measurement of dry sand, water saturated sand and ice saturated sand show the diameter of sand sphere has a key effect on the effective thermal conductivity of porous media. And the effect comes from the mutual reaction of the contact heat resistance and the relative volume of continuous phase.
出处 《化工学报》 EI CAS CSCD 北大核心 2003年第z1期67-70,共4页 CIESC Journal
基金 国家自然科学基金(59836230)(50176051) 国家基础研究规划基金(G2000026306)
关键词 Hotdisk 热导率 瞬态板热源法 热物性 Hotdisk, thermal conductivity, transient plane source, thermal physical properties
作者简介 黄犊子,1976年生,男,安徽安庆人,中国科学技术大学博士生,现在中科院广州能源所从事天然气水合物热物性研究的博士论文工作. 樊栓狮,联系人,020-87057705.E-mail:hydrate@ms.giec.ac.cn
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