PROPANE or R290
PROPANE provides high accuracy thermodynamic and transport properties for propane (C3H8, Molar mass = 44.095 g/mol) using the Fundamental (or Helmholtz Free Energy) Equation of State formulated by:
Eric W. Lemmon and Mark O. McLinden
"Thermodynamic Properties of Propane. III. A Reference Equation of State for Temperatures from the Melting Line to 650 K and Pressures up to 1000 MPa"
J. Chem. Eng. Data 2009, 54, 3141-3180
The equation of state is valid for temperatures between 85.525 K (the triple point temperature) and 650 K at pressures up to 1000 MPa. The default reference state is the IIR standard for which h=200.0 kJ/kg and s=1.0 kJ/kg-K for saturated liquid at 273.15 K. The reference state can be changed using the $Reference directive.
(Versions prior to 12.011 used the equation of state by: Miyamoto, H., and Watanabe, K., "A thermodynamic property model for fluid-phase propane," Int. J. Thermophys., 21(5):1045-1072, 2000).
Thermal conductivity data are provided by:
K.N. Marsh, R.A. Perkins, M.L.V. Ramires,
"Measurement and correlation of the thermal conductivity of propane from 86 K to 600 K at pressures to 70 MPa,"
J. Chem. Eng. Data 47, 932-940 (2002)
Viscosity data are provided by:
Eckhard Vogel and Sebastian Herrmann
"New Formulation for the Viscosity of Propane"
J. Phys. Chem. Ref. Data 45, 043103 (2016);
https://doi.org/10.1063/1.4966928
(Versions prior to 11.595 used the viscosity correlation by B.A. Younglove and J.F. Ely, J. Phys. Chem. Ref. Data Vol. 16, No. 4, 1987)
Surface tension data are provided through a correlation developed by:
G.R. Somayajulu
"A Generalized Equation for Surface Tension from the Triple Point to the Critical Point"
International Journal of Thermophysics, Vol. 9, No. 4, 1988
The melting pressure curve (valid for temperatures between 85.48 K and 168 K) is determined from:
Lide, D.R. and Kehiaian, H.V.,
CRC Handbook of Thermophysical and Thermochemical Data
CRC Press, 1994, ISBN 0-8493-0197-1, 5th printing
Note that PROPANE provides thermodynamic properties assuming real fluid behavior. Use C3H8 for ideal gas properties of propane consistent with reference states used in combustion calculations.