Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The combination of difluoromethane (R32), 1,1-difluoroethane (R152a) and 2,3,3,3tetrafluoroprop-1-ene (R1234yf) could be a potential substitute for hydro-fluorocarbon (HFC) refrigerants. The reliable vapor liquid equilibrium (VLE) data are important thermodynamic data in evaluating the performance of refrigeration cycles and determining their optimal compositions. In this work, we measured the VLE data for binary mixtures of R32 + R152a and R152a + R1234yf, and ternary system of R32 + R152a + R1234yf. The measurements were carried out by using the AnTLcirCapValVis analytical method over the temperature range from 283.15 K to 323.15 K. The standard uncertainties of temperature, pressure and mole fractions are 10 mK, 0.5 kPa and 0.005, respectively. The Peng-Robinson-Stryjek-Vera (PRSV) equation of state (EOS) combined with the Wong-Sandler (WS) mixing rule and the non-random two-liquid (NRTL) activity coefficient model was employed to correlate the parameters of binary mixtures and predict the ternary VLE property. The predicted VLE data and K-value for the ternary system show good agreement with the experimental results.