Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

P.rho.Tx properties of binary R134a/R245fa system

Qi, Yingxia, Yang, Haifeng, Zhang, Can
J. Chem. Thermodyn. 2019, 135, 68-74
ABSTRACT
The gaseous PVTx properties of 1,1,1,2-tetrafluoroethane (R134a) + 1,1,1,3,3-pentafluoropropane (R245fa) mixtures were measured at pressures from 124 to 650 kPa, temperatures from 300.15 to 335.15 K and the compositions of R134a from 0.30 to 0.55 mass fraction using the Burnett isothermal expansion method. The uncertainty of temperature measurement was estimated to be within +-10 mK temperature, the pressure was within +-4 kPa, the mass fraction was within +-0.3%, and the compression factor was within +-0.06%. Based on the experimental PVTx property data, the densities and gas virial equation of the mixed refrigerants at the different temperatures and pressures were fitted. It provided detailed data for the further research on the performance of the Organic Rankine Cycle adopting the new alternative refrigerant.
Compounds
# Formula Name
1 C3H3F5 1,1,1,3,3-pentafluoropropane
2 C2H2F4 1,1,1,2-tetrafluoroethane
3 C3H2F4 trans-1,3,3,3-tetrafluoropropene
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • ISOPVT
  • 9
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mass fraction - 2; Gas
  • Gas
  • Burnett expansion method
  • 240