| 초록 |
Vapor-liquid equilibria data are required as one of the most important types ofbasic information in evaluating the performance of refrigeration cycles and determiningtheir optimal compositions. In this work, we measured VLE data for two binarysystems of 1, 1, 1, 2, 3, 3, 3-Heptafluoropropane (HFC-227ea) + Difluoromethane (HFC-32), +Hexafluoropropylene. The experimental data were correlated with the NRTL(Non-Random Two Liquid) model. In addition, the non-ideality of HFC-227ea +HFC-32, + HFP, and + iso-butane was discussed by calculating the excess gibbsenergy. As a result, the HFC-227ea + HFC-32, and + HFP systems show small positiveand small negative deviations, respectively, while the HFC-227ea + iso-butane(hydrocarbon) system shows a strong positive deviation from Raoult's law, moreoverthe non-ideality of HFC-227ea + HFCs mixtures were much lower than that ofHFC-227ea + hydrocarbon (iso-butane) mixture. |
