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采用基于对应态原理的混合工质迁移物性预测模型 ,对含氮烷烃类多元混合工质的粘度和导热系数进行了预测 .该模型通过引入混合规则 ,仅需输入混合工质各组分的分子量、偏心因子和临界参数即可预测混合工质的粘度和导热系数 .混合工质迁移物性表示为对比压力而不是对比密度的函数 ,可直接由温度、压力和混合物组成进行计算 ,简便可行 ,有效减少了密度对预测精度的影响 .应用于二元轻烃混合物及多元氮烃混合工质高压粘度的预测 ,平均绝对误差分别为 4 .1 3%和2 .1 3% ,二元混合物导热系数预测的平均绝对误差为 4 .4 7% .
The viscosity and thermal conductivity of the multi-component mixtures containing nitrogenous alkanes were predicted using the model of predicting the migration properties of mixed working fluids based on the corresponding state principle. By introducing the mixing rule, the model only needs to input the molecular weight of each component of the mixed working medium , Eccentricity and critical parameters can predict the viscosity and thermal conductivity of the mixed working fluid.Transferred properties of the mixed working fluid are expressed as a function of the contrast pressure rather than the contrast density and can be directly calculated from the composition of temperature, pressure and mixture, which is simple, feasible and effective Reduce the impact of density on the prediction accuracy.Applied to predict the high pressure viscosity of binary mixtures of light hydrocarbons and multiple nitrogen compounds working medium, the average absolute error of 4.13% and 2.13% respectively, the binary mixture thermal conductivity The average absolute prediction error is 4.47%.