1999•Journal of Chemical & Engineering DataRequires access

Phase Equilibria of Chlorofluorocarbon Alternative Refrigerant Mixtures

Byung Gwon Lee, Ji Young Park, Jong Sung Lim, Sung Yong Cho, Kun You Park

Abstract

Isothermal vapor−liquid equilibrium data were determined for binary systems of difluoromethane/1,1,1,2-tetrafluoroethane (HFC-32/HFC-134a), difluoromethane/pentafluoroethane (HFC-32/HFC-125), difluoromethane/1,1,1-trifluoroethane (HFC-32/HFC-143a), and difluoromethane/1,1-difluoroethane (HFC-32/HFC-152a). The vapor and liquid compositions and pressures were measured in a circulation-type apparatus at 303.15 K and 323.15 K. The experimental data were compared with literature results and correlated with the Canahan−Starling−De Santis equation of state within the uncertainty of ±1.0%.

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Key concepts: Difluoromethane, Refrigerant, Chemistry, Isothermal process, Fluorocarbon, Chlorofluorocarbon, Thermodynamics, Phase equilibrium