基于TPS法液体导热系数的测量  

Measurement of liquid thermal conductivity based on TPS method

作　　者：贺永智 徐旭[1] 潘江[1] 赵顺凯 HE Yongzhi;XU Xu;PAN Jiang;ZHAO Shunkai(China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学,浙江杭州310018

出　　处：《中国测试》2021年第5期52-57,共6页China Measurement & Test

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。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.

关 键 词：导热系数 TPS法 液体 纯水 无水乙醇 

分 类 号：TH835[机械工程—仪器科学与技术]