作者：贺永智, 徐旭, 潘江, 赵顺凯

作者单位：中国计量大学，浙江 杭州 310018

关键词：导热系数;TPS法;液体;纯水;无水乙醇

摘要：

为解决常用的液体导热系数测量方法中存在的弊端，该文研制一套基于TPS法的液体导热系数测量装置。该装置采用探头压紧件，使探头始终保持竖直方向，减小液体对流对实验结果的影响，并通过不锈钢压紧件上的气体导通道排出腔体内的气体，减少气体的影响，使液体导热系数的测量结果更加准确。实验测量纯水和无水乙醇在特定温度下的导热系数，并与文献数据进行比较，其误差均在3%以内。误差产生的主要原因是随着温度升高装置内液体蒸发，产生扰动从而影响测量结果。通过分析不同温度下两种液体的导热系数的不确定度，可验证该实验装置的可行性。

Measurement of liquid thermal conductivity based on TPS method
HE Yongzhi, XU Xu, PAN Jiang, ZHAO Shunkai
China Jiliang University, Hangzhou 310018, China
Abstract: In order to solve the shortcomings of measurement of liquid thermal conductivity using TPS method, an apparatus for liquid thermal conductivity measurement was developed. In this apparatus, the probe was fixed vsertically with probe compression blocks and the influence of liquid convection on the experimental results is reduced. The gas in the cavity was discharged through the gas guide channel on the stainless steel compression blocks. The thermal conductivity of pure water and pure ethanol was measured, and compared with the literature data. The error was less than 3%, which verified the feasibility of the experimental device. The feasibility of the experimental device is verified by analyzing the uncertainty of thermal conductivity of two liquids at different temperatures.
Keywords: thermal conductivity;TPS method;liquid;pure water;pure ethanol
2021, 47(5):52-57  收稿日期: 2020-07-14;收到修改稿日期: 2020-09-08
基金项目:
作者简介: 贺永智(1993-),男,陕西榆林市人,硕士研究生,专业方向为能源计量与测试技术
参考文献
[1] WANG H, SEN M. Analysis of the 3-omega method for thermal conductivity measurement[J]. International Journal of Heat and Mass Transfer, 2008, 52(7): 17-21
[2] 金鹏, 陆锷, 潘德辉, 等. 基于热线法的导热系数自动测试仪[J]. 现代科学仪器, 2008(6): 18-20
[3] GUSTAFSSON S E. Transient plane source techniques for thermal conductivity and thermal diffusivity measurement of solid materials[J]. Review of Scientific Instruments, 1991, 62(3): 797-804
[4] HE Y. Rapid thermal conductivity measurement with a hot disk sensor: Part 1. Theoretical considerations[J]. Thermochimica Acta, 2005, 436(1): 122-129
[5] 翟德怀. 基于Hot-Disk的薄板材料导热系数测量方法的研究[D]. 广州: 华南理工大学, 2015.
[6] 肖红俊, 于帆, 张欣欣. 瞬态平面热源法测量材料导热系数[J]. 北京科技大学学报, 2012, 34(12): 1432-1436
[7] SANMAMED Y A, GONZÁLEZ-SALGADO D, TRONCOSO J, et al. Experimental methodology for precise determination of density of RTILs as a function of temperature and pressure using vibrating tube densimeters[J]. The Journal of Chemical Thermodynamics, 2009, 42(4): 553-563
[8] 范健, 路新成. 热常数分析仪测试热物理参数的不确定度评定[J]. 江苏科技信息, 2015(15): 41-43
[9] ZHANG H, LI M J, FANG W Z, et al. A numerical study on the theoretical accuracy of film thermal conductivity using transient plane source method[J]. Applied Thermal Engineering, 2014, 72(1): 62-69
[10] 毛杰键, 叶表良, 李杨, 等. 液体导热系数测量方案的探究[J]. 上饶师范学院学报, 2018, 38(6): 20-23
[11] 王伟, 陈奇良, 周孝清, 等. 基于Hot-disk的液体导热系数测量装置实验研究[J]. 建筑节能, 2016, 44(5): 84-87+108