Flow-X─ Function Reference
4-191
Flow-X General functions - fxGERG2008_Flash
fxGERG2008_Flash
The compressibility and density of a gas/liquid mixture are calculated from its composition,
temperature and pressure in accordance with the GERG2008 standard.
Compliance
Kunz, O., and W. Wagner. "The GERG-2008 wide-range equation of state for natural gases
and other mixtures: An expansion of GERG-2004." Journal of Chemical & Engineering Data
57.11 (2012): 3032-3091.
W. Wagner. “Description of the Software Package for the Calculation of Thermodynamic
Properties from the GERG-2008 Wide-Range Equation of State for Natural Gases and Other
Mixtures”.
Boundaries
The GERG2008 calculation has defined uncertainty bounds for gas mixtures that lie within the 'Normal
range'. Also an 'Expanded range' of gas mixtures is defined for which the GERG2008 calculation has a
higher uncertainty. Using the GERG2008 calculation for gas mixtures that lie outside the 'Expanded
range' is not recommended.
Input value
Normal Range
Expanded Range
EU
Pressure
0 .. 350
0 .. 700
bar(a)
Temperature
-183 .. +177
-213 .. +427
°C
Mole fraction of Methane
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Ethane
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Propane
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Butanes
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Pentanes
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Hexanes Plus
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Carbon monoxide
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Carbon dioxide
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Nitrogen
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Helium
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Argon
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Oxygen
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Hydrogen Sulphide
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Hydrogen
0.00 .. 1.00
0.00 .. 1.00
-
Mole fraction of Water
0.00 .. 1.00
0.00 .. 1.00
-
Function inputs and outputs
Function
inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag group
Pressure
Pressure value
bar(a)
0..2000
1.01325
Temperature
Temperature value
°C
-200..+400
0
Composition
Standard composition as
defined in section
'Standard gas composition.
mol/mol
COMP
0..1
0
neo-Pentane
mode
Determines what to do
when component neo-
Pentane is larger than zero
1: Add to i-Pentane
2: Add to n-Pentane
3: Neglect
-
NEOC5_MODE
1
Содержание flow-x
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