几种二元混合制冷剂的汽液平衡研究

Vapor Liquid Equilibria of Binary Refrigerant Mixtures

对臭氧安全二元混合物系HFC125／HFC143a和HFC152a／HFC143a进行了泡点、露点实验研究和相平衡关联计算，结果表明前者为近共沸混合物，后者为非共沸混合物。给出了10种低环害二元物系对应于RKS、PR、PT状态方程及二次型混合规则的交互作用系数。

Fifteen measurements on bubble and dew point for HFC125/HFC143a andHFC152a/HFC143a were taken by means of PVTx apparatus with the uncertainties of ±78mK,±.4KPa, ±0.05% and ±0.01% for temperature, pressure, density and composition respectively-Theywere used to deterndne those binary interaction coefficients in drixing rules for RKS, PR, and PTequations of state. The vapor liquid equilibrium calculations showed that HFC125/HFC143a was anear-azeotropy ndxture while HFC152a/HFC143a was a nonazeotropy mixture. The optindzed binaryinteraction coefficients of other 8 binary mixtures were also given.