液体混合物导热率的测量及导热率数据的理论预测

液体混合物导热率的测量及导热率数据的理论预测童景山，唐建，高光华，梁燕波（清华大学化学工程系北京１０００８４）关键词导热率，液体混合物，测量仪，预计法１测量原理与测量装置本文报道的这种仪器，它不仅可用来测量有机化合物的液相导热率，而且也可测量高导热率...

MEASUREMENT OF THERMAL CONDUCTIVITIES OF LIQUID MIXTURES AT NORMAL OR HIGH PRESSURE AND ESTIMATION OF THERMAL CONDUCTIVITY DATA BY USING A THEORETICAL METHOD

This paper reports a new instrument for measuring liquid thermal conductivity at normal or high presssure.This is programcontrolled instrument which can rapidly measure liquid thermal conductivity with a thermistor probe as its sensitive element. It can measure not only the organic liquids with low thermal conductivity(including electrolyte and nonelectrolyte),but also substances with high thermal conductivity,such as water,aqueous solution.In addition,this paper also discusses the mechanism of liquid thermal conductivity on the basis of the cell model,and thus presents the equation for predicting thermal conductivity of liquid mixtures.To verity the accuracy of the proposed equation the heat-conductivities of a number of binary liquid mixtures at normal or high presssure are calculated and compared with the experimental data.The predicted results shows that the proposed equation is fairly fitted to the experimental-data.