Effect of temperature and mole fraction on viscosity and thermal conductivity of water and ethanol mixture

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Zhang, Binglong^1 ; Liu, He^1 ; Dong, Jinzhong^1 ; Liu, Shuiming^1

School of Energy and Power Engineering, Beihang University, Beijing

100191, China^1

关键词: Calculation programs;    Calculation results;    Effect of temperature;    Ejector refrigeration systems;    Ethanol mixtures;    Heat exchange medium;    Performance calculation;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/4/042048/pdf
DOI  :  10.1088/1755-1315/227/4/042048

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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.