测定保温材料导热系数的自补偿圆管法的方法误差分析  

An Analysis of Error of Method in the Cylinder Method for Measuring the Thermal Conductivity of Thermo-insulating Materials with Heating of Self-Compensation

作　　者：王素美[1] 宗祥康[1] 虞维平[1] 

机构地区：[1]东南大学动力工程系

出　　处：《计量学报》1998年第2期119-122,160,共5页Acta Metrologica Sinica

摘　　要：本文对测定保温材料导热系数的自补偿圆管法的方法误差进行了分析。在００４～０１０Ｗ／（ｍ·Ｋ）导热系数范围内，固定功率补偿子方案的方法误差不超过２３％；而在００４～００６和００６～０１０Ｗ／（ｍ·Ｋ）分区域范围内则分别不超过１３％和１０％。这表明，测定保温材料导热系数的自补偿圆管法采用固定补偿因子方案在原理上是可行的。The error of method in the cylinder method for measuring the thermal conductivity of thermo-insulating materials with heating of self-compensation is analyzed with a numerical method. The single scheme of compensating heating is appropriate in the range of thermal conductivities 0.04～0.10 W/(m·K) with the error of method of 2.3%, and in the ranges 0.04～0.06 and 0.06～0.10 W/(m·K) with error of 1.3% and 1.0% respectively. It is shown that the single scheme of self-compensating method is feasible in applications.

关 键 词：导热系数 保温材料 自补偿 

分 类 号：TB350.3[一般工业技术—材料科学与工程]