Approaches to extract thermal properties from dual-thermistor heat pulse experimental data

作者：Zhang HF^*; He LQ; Zhao G; Cheng SX; Gao DY

来源：Measurement Science and Technology, 2004, 15(1): 221-226.

DOI：10.1088/0957-0233/15/1/031

• point heat pulse
• thermistor
• thermal diffusivity
• thermal conductivity
• nonlinear fit
• sensitivity analysis

Experimental data of temperature versus time obtained by dual-thermistor heat pulse equipment can be analysed by two approaches to find the thermal diffusivity and the thermal conductivity. One, referred to as the peak point approach, is based on accurate identification of the peak point in the temperature versus time measurement. The other is a nonlinear fit approach by comparing the theoretical model with the experimental data. A sensitivity analysis is performed to define an optimal measurement time interval with a desired uncertainty limit for the nonlinear data fit. The experimental design can also be optimized from the sensitivity analysis. A comparison of the two approaches is presented according to the results of data processing.

• 出版日期2004-1
• 单位中国科学技术大学