Correlation of the Critical Curve for Binary Refrigerant Mixtures

概要

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Predictive methods of the critical curve are assessed on the basis of a comparison with the experimental results obtained using our own critical parameters for binary refrigerant mixtures. These mixtures included the R 12 (dichlorodifluoromethane ; CCl_2F_2) + R 22 (chlorodifluoromethane ; CHClF_2) system, the R 22 + R 114 (1,2- dichlorotetrafluoroethane ; CClF_2CClF_2) system, and the R 13 B 1 (bromotrifluoromethane ; CBrF_3) + R 114 system. The following predictive methods for critical parameters of a mixture were assessed: that by Li for critical temperature, that by Cheuh-Prausnitz for critical temperature and critical molar volume, that by Kreglews-ki-Kay for critical pressure. Furthermore, the Soave-Redlich-Kwong (SRK) equation and the Peng-Robinson (PR) equation were also evaluated. From these comparisons, it becomes clear that it is difficult to consistently predict the critical curve for binary refrigerant mixtures using the predictive methods thus far reported. We therefore propose a new correlation so as to represent the composition dependence of the critical parameters for three different systems of binary refrigerant mixtures.
一般社団法人日本機械学会の論文
1988-08-15