【摘要】 为了利用PR方程和Huron Vidal混合规则对三元混合制冷剂的热力性质进行精确计算 ,通过对 10组二元HFCS 混合制冷剂的汽液相平衡实验数据进行热力学关联 ,得出了相应的NRTL模型参数 ,由优选得到的过量Gibbs自由能NRTL模型的相互作用系数预测了构成R4 0 7C和R4 0 4A的三元混合制冷剂R32 /R12 5 /R134a以及R12 5 /R14 3a/R134a的汽液相平衡 ,结果表明 ,泡点压力实验值和计算值的算术平均相对偏差小于 0 .4 2 % ,各组分的汽相组成实验值和计算值基本吻合。最后还应用相关热力性质分别对R32 /R12 5和R4 0 7C进行了理论制冷循环分析计算并和其他模型的计算结果进行了比较更多还原

【Abstract】 To calculate thermodynamic properties of ternary refrigerant mixtures,the binary interaction parameter of the NRTL excess Gibbs free-energy model for ten groups of HFC (hydrofluorocarbon) refrigerant mixtures were correlated by the vapor liquid equilibrium experimental data with the P-R equation of state and the Huron-Vidal original mixture rules in the study. At the same time,the vapor-liquid equilibrium of ternary refrigerant mixtures of R32/R125/R134a and R125/R143a/R134a has been predicted with determined interaction parameters.Calculated results showed a good agreement with the experimental data,especially the average deviations of bubble point pressure were less than 0.42%.At last,the characteristics of the refrigeration cycle with R32/R125 and R407c are analyzed and discussed.更多还原