lib.mEoS.R32

Fluid info

  • CAS Number: 75-10-5

  • Formula: CH2F2

  • Synonym: R32

  • Molecular weigth: 52.024 g/mol

  • Tc: 351.2550 K

  • Pc: 5.7820 MPa

  • ρc: 424.0000 kg/m³

  • Tt: 136.3400 K

  • Tb: 221.4990 K

  • Acentric factor: 0.2769

  • Dipole moment: 1.9780 Debye

Equation of state

  • Tillner-Roth, R., Yokozeki, A.; An International Standard Equation of State for Difluoromethane (R-32) for Temperatures from the Triple Point at 136.34 K to 435 K at Pressures up to 70 MPa. J. Phys. Chem. Ref. Data 26(6) (1997) 1273-1328, http://dx.doi.org/10.1063/1.556002

  • Outcalt, S.L., McLinden, M.O.; Equations of State for the Thermodynamic Properties of R32 (Difluoromethane) and R125 (Pentafluoroethane). Int. J. Thermophysics 16(1) (1995) 79-89., http://dx.doi.org/10.1007/BF01438959

  • Span, R., Wagner, W.; Equations of State for Technical Applications. III. Results for Polar Fluids. Int. J. Thermophys., 24(1) (2003) 111-162, http://dx.doi.org/10.1023/A:1022362231796

  • Astina, I.M., Sato, H.; A Rational Helmholtz Fundamental Equation of State for Difluoromethane with an Intermolecular Potential Background. Int. J. Thermophys. 24(4) (2003) 963-990, http://dx.doi.org/10.1023/A:1025096716493

  • Vasserman A.A., Fominsky D.V.; Equations of State for the Ozone-Safe Refrigerants R32 and R125. Int. J. Thermophysics 22(4) (2001) 1089-1098, http://dx.doi.org/10.1023/a_1010699806169

  • Sun, L., Ely, J.F.; Universal equation of state for engineering application: Algorithm and application to non-polar and polar fluids. Fluid Phase Equilib., 222-223 (2004) 107-118, http://dx.doi.org/10.1016/j.fluid.2004.06.028

Viscosity

  • Huber, M.L., Laesecke, A., Perkins, R.A.; Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a. Ind. Eng. Chem. Res., 42(13) (2003) 3163-3178, http://dx.doi.org/10.1021/ie0300880

Thermal Conductivity

  • Huber, M.L., Laesecke, A., Perkins, R.A.; Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a. Ind. Eng. Chem. Res., 42(13) (2003) 3163-3178, http://dx.doi.org/10.1021/ie0300880

Calculation example

Using the first option for equation of state, we can get this diagram plots with the liquid-gas saturation region:

_images/R32.png

The diagram is generated with this module running with the compound name as parameter or edited in file

python3 plotMEoS.py R32