R1132(E)
R1132(E) provides property data for trans-1,2-difluoroethene (C2H2F2, MW 164.049 g/gmole, CAS# 1630-78-0). The thermodynamic and transport properties are obtained using the methods described by:
Ryo Akasaka and Eric W. Lemmon
"A Helmholtz Energy Equation of State for Calculations of Thermodynamic Properties of trans.1,2.Difluoroethene [R.1132(E)]"
International Journal of Thermophysics (2024) 45:174
https://doi.org/10.1007/s10765-024-03447-8
The properties are valid for temperatures between 240 K and 40 K for pressures up to 6.5 MPa.
The IIR reference is used for specific enthalpy and entropy, i.e., h=200 kJ/kg and s=1 kJ/kg-K for saturated liquid at 273.15 K.
Viscosity and thermal conductivity have been estimated using a corresponding states approach with propane as the reference fluid as suggested in:
Klein, S.A., McLinden, M.O., and Laesecke , A., "An improved extended corresponding states method for estimation of viscosity of pure refrigerants and mixtures'
Int. J. of Refrigeration, 20, pp. 208-217, 1997
McLinden et al., "An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures",
Int. J. of Refrigeration, 23, pp. 43-63, 2000
The estimated transport properties should be applicable for the range in which the equation of state is valid.
The viscosity correlations compare well with data from:
Dipayan Mondal
"Transport Properties Measurements of Next-Generation Refrigerants and Mixture"
Ph.D thesis: Department of Science and Advanced Technology
Graduate School of Science and Engineering Saga University, Japan, September 2021
Surface tension data are based on the correlation provided by:
Tomoaki Imai et al.
"Surface tension measurement and molecular simulation for new low global warming potential refrigerants R1132(E) and R1132a"
Journal of Molecular Liquids 407 (2024)