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Flow-X─ Function Reference
Flow-X General functions - fxAGA10_M
fxAGA10_M
The function calculates the speed of sound of a gas at the specified conditions of temperature and
pressure using the formulae presented in the American Gas Association Report No 10.
Compliance
AGA Report No. 10 - Speed of Sound in Natural Gas and Other Related Hydrocarbon Gases, January
2003
Boundaries
The AGA-10 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 AGA-10 calculation has a
higher uncertainty. Using the AGA-10 calculation for gas mixtures that lie outside the 'Expanded range'
is not recommended.
The AGA-10 standard specifies the same limits as the AGA-8 standard. Refer to the fxAGA8 function for
details on the actual limit values used by this function to set output ‘Range’.
Function inputs and outputs
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag
group
Pressure
Observed pressure
bar(a)
0..2000
Temperature
Observed temperature
°C
-
200..+400
Composition
Standard composition
as defined in section
'Standard gas
composition.
mol/mol
COMP
0..1
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
Function
outputs
Remark
EU
SW tag
Alam
Fallback
Status
0: Normal
1: Input argument out of range
2: Calculation error
3: No convergence
4: Mole fractions do not add up to
1.0 +- 0.0001
STS
FIOOR
CALCERR
NOCONV
COMPOOR
Speed of
sound
m/s
SOS
0
Range
0: In Normal Range
All inputs are within the
'Normal Range'
1: In Extended Range
One or more inputs
within the 'Extended
Range, but none of the
inputs outside the
Extended rang (outputs
RANGE
OOR
0
Содержание flow-x
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