**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:

Miyamoto, H., and Watanabe, K.,

"A thermodynamic property model for fluid-phase propane,"

Int. J. Thermophys., 21(5):1045-1072, 2000.

The equation of state is valid for temperatures between 85.48 K (the triple point temperature) and 623 K at pressures up to 103 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.

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. An older, less accurate formulation for real fluid propane properties is available with fluid Propane_MH.

__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:__

B.A. Younglove and J.F. Ely,* *

*"Thermophysical Properties of Fluids. II Methane, Ethane, Propane, Isobutane and Normal Butane"*,

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