Flow-X─ Function Reference
4-185
Flow-X General functions - fxEthylene_IUPAC_M
fxEthylene_IUPAC_M
Description
The function calculates the compressibility factor and the density of Ethylene (C2H4, also called Ethene)
based on the Equation Of State published by IUPAC and in metric units.
References
Ethylene (Ethene), International Thermodynamic Tables of the Fluid State Vol. 10 (1988),
IUPAC, ISBN 0-63201-7090.
Boundaries
The limits of the tables are 104 K to 320 K (-170 .. +47 °C) for pressures up to 270 MPa (2700 bar) and
104K to 450K (-170 .. +177 °C) for pressures up to 40 MPa (400 bar).
Function inputs
Remark
EU
Range
Default
Name
Optional tag name, tag description and tag
group
Temperature
°C
-200..200
0
Pressure
bar(a)
3000
0
Function outputs
Remark
EU
Fallback
Status
0: Normal
1: Input argument out of range
2: Calculation error
3: No convergence
Density
kg/m3
0
Compressibility
-
0
Equilibrium pressure
Equilibrium pressure at the observed temperature.
Also referred to as vapor pressure or saturated
pressure
bar(a)
0
Range
With respect to the combination of temperature and
pressure is:
0: In Range
1: Out of Range
-
0
Calculations
The calculations are in compliance with the standard.
Because the IUPAC Equation Of State specifies the calculation of the pressure from a known
temperature and density iteration is required to determine the density from the input pressure. A
convergence limit of 0.0005 kg/m3 is applied. A maximum of 20 iterations is applied.
Summary of Contents for flow-x
Page 1: ...Function Reference Certified flow calculations Flow and batch calculations Worksheet functions...
Page 331: ...Flow X Function Reference 5 331 Flow X IO Functions fxPT100Table...
Page 349: ...Flow X Function Reference 6 349 This page is intentionally left blank for user notes...
Page 350: ...6 350 Flow X Function Reference This page is intentionally left blank for user notes...
