Vapor liquid equilibria for binary mixtures of difluoromethane (R32) + fluoroethane (R161) and fluoroethane (R161) + trans-1,3,3,3-tetrafluoropropene (R1234ze(E))

Developing new refrigerants with low global warming potential (GWP) is the major challenge for the refrigeration industry with the Paris Agreement going into effect on 4 November 2016. In this work, we reported the isothermal vapor liquid equilibrium (VLE) data for the low GWP binary refrigerants of difluoromethane (R32) + fluoroethane (R161) and fluoroethane (R161) + trans-1,3,3,3-tetrafluoropropene (R1234ze(E)). The measurements were carried out with a quasi-static analytical apparatus along five isotherms from (283.15 to 323.15) K. The experimental data were correlated by Peng-Robinson-Stryjek-Vera equation of state combined with the Wong and Sandler mixing rule and the non-random two-liquid activity coefficient (PRSV + WS + NRTL) model. The correlated results and the experimental data show good consistency. The average absolute deviation of pressure (AAD(p)) and average absolute deviation of vapor phase mole fraction (AAD(y)) are 0.12% and 0.0011 for R32 + R161, 0.20% and 0.0014 for R161 + R1234ze(E), respectively.