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
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.
出处
《制冷学报》
CAS
CSCD
北大核心
2003年第2期16-21,共6页
Journal of Refrigeration
关键词
HFCS
混合制冷剂
热力性质
混合规则
活度系数
循环分析
汽液相平衡
engineering thermal physics,thermodynamic properties,equation of state,refrigerant mixtures,mixing rules,activity coefficient,refrigerating cycle analysis
