Contents - Index
He provides ideal gas thermodynamic properties for normal helium valid over the temperature range from 50 K to 6000 K based on a constant pressure specific heat of 20.786 J/kmol-K. The reference state for specific enthalpy is 0 at 25 C. The reference state for specific entropy is 0 at 298.15 K and 101.3 kPa
Transport property correlations were also taken from Yaws, Carl L., ed. Chemical Properties Handbook. New York: McGraw-Hill, 1999.
The viscosity correlation is applicable for temperatures between 150 K and 2000 K.
The thermal conductivity is applicable for temperatures between 100 K and 2000 K.
Note that He provides thermodynamic properties assuming ideal gas behavior. Use Helium to provide real fluid properties in the subcooled, saturated mixture, and superheated regimes.
Fluid Property Information