摘要
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% .
Based on the corresponding states principle, a model was used to predict transport properties such as viscosity and thermal conductivity of the multicomponent mixed refrigerants composed of nitrogen and hydrocarbons. By introducing the mixing rule, only molecular weight and acentric factor and critic parameters of each components are required as input. Transport properties of the mixed refrigerants were presented as a function of reduced pressure rather than reduced density, the procedure was simplified and calculation could be made if temperature and pressure and components were known. The density dependence of prediction accuracy is greatly reduced. Comparisons between the calculation and experimental data of binary light hydrocarbon mixtures and multicomponent hydrocarbon mixtures were presented. The average absolute deviations for viscosity prediction are 4.13% and 2.13% respectively and the average absolute deviation for thermal conductivity prediction is 4.47%.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2000年第9期1175-1178,共4页
Journal of Shanghai Jiaotong University
关键词
混合工质
迁移性质
工质热力学
mixed refrigerants
transport property
corresponding states principle
