| 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R407C和R404A的三元混合制冷剂R32／R125／R134a以及R125／R143a／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0．42％，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／R125和R407C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。 |
| 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 |
| DOI： |
| 修订日期：2002-11-29
|
| 基金项目: |
|
| Study on Thermodynamic Properties of HFCs Refrigerant Mixtures |
|
| () |
| 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. |
| Key words: engineering thermal physics,thermodynamic properties,equation of state,refrigerant mixtures,mixing rules,activity coefficient,refrigerating cycle analysis |
