EGAS module

Program features

The module calculates the physical properties of natural gas (gaseous).
Two characteristic compositions of natural gas L and H are available.

The concentrations of the individual components (methane, ethane, propane, butane, nitrogen and carbon dioxide) can be entered freely.

Composition in % by volume

Natural gas L Natural gas H
Methane CH4 82,0 85,4
Ethane C2H6 3,3 8,0
Propane C3H8 0,6 2,9
Butane C4H10 0,3 1,0
Nitrogen N2 12,6 0,7
Carbon dioxide CO2 1,2 2,0


  • Density
  • specific heat capacity cp and cv
  • Dynamic viscosity
  • kinematic viscosity
  • Thermal conductivity
  • Prandtl number
  • Thermal diffusivity
  • Coefficient of thermal expansion
  • Compressibility factor
  • Isentropic exponent cp/cv
  • enthalpies and entropies

For the calculation, temperatures from -50 to 300 °C are permitted in this module.
The permissible pressure range is from 1 to 250 bar.

The calculation of the physical properties is based on the assumption that the natural gas is gaseous. There is no verification of the phase state (phase equilibrium calculation). For this we recommend our PROPER program.

Price: see price list

see also:

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