Abstract
The viscosity and thermal conductivity of the mixture as a heat exchange medium are the main factors affecting the heat transfer performance. In this paper, the mixture of water and ethanol is used as the research object. The viscosity and thermal conductivity of gas and liquid are calculated by various methods. Combined with the experimental data, the variation law with temperature and mole fraction is analysed, and the difference of different calculation methods is compared. When calculating the viscosity of water and ethanol mixture, the Teja and Rice method and the Jouyban and Acree method are suitable for different temperature ranges. The Jamieson method is more practical than the Baroncini method, when calculating the thermal conductivity. Finally, the calculation results are applied to an ejector refrigeration system calculation program, and it is found that the viscosity and thermal conductivity of the heat exchange medium have an important influence on the accuracy of the system performance calculation.
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