A dual-thermistor probe for absolute measurement of thermal diffusivity and thermal conductivity by the heat pulse method

被引：21
|
作者：
Zhang, HF [1 ]
He, LQ [1 ]
Cheng, SX [1 ]
Zhai, ZT [1 ]
Gao, DY [1 ]
机构：
[1] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Anhui, Peoples R China
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2003年 / 14卷 / 08期
关键词：
heat-pulse method; thermistor; thermal diffusivity; thermal conductivity;
D O I：
10.1088/0957-0233/14/8/327
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Based on a transient thermal model of a point heat pulse, a dual-thermistor probe, in which two thermistor beads serve as point heater and temperature sensor respectively, has been developed for absolute measurement of thermal diffusivity and conductivity. An experimental system with high sensitivity for temperature change is designed to perform the measurement. Experimental results of samples are in agreement with the recommended values. The validation of the one-dimensional point source heat transfer is discussed, and the deviation from the theoretical model is negligibly small for the measurement. The estimated measurement uncertainties are 3.5% and 5.3% for thermal diffusivity and conductivity respectively.
引用
收藏
页码：1396 / 1401
页数：6
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