4-240
Flow-X─ Function Reference
Flow-X General functions - fxISO6976ex_1995_M
fxISO6976ex_1995_M
Extended version that takes the first 55 components as used in the standard plus an additional set of
user-definable components.
ISO standard 6976 edition 1995 defines component properties and calculations to determine the
calorific value, density, relative density and Wobbe index for a gas composition at the specified
metering and combustion reference temperatures and 1.01325 bar(a).
Both the definitive and alternative methods of calculating the calorific value on a mass and volumetric
basis are included.
Boundaries
The valid ranges for molar fractions are as follows:
Methane
0.5 <= .. <= 1.0
Nitrogen
0.0 <= .. <= 0.3
Ethane
0.0 <= .. <= 0.15
Carbon dioxide
0.0 <= .. <= 0.15
All others
0.0 <= .. <= 0.05
Compliance
International standard, Natural Gas - Calculation of calorific values, density, relative density
and Wobbe index (ISO 6976:1995/BS7589)
Function
inputs
Remark
EU
Default
Name
Optional tag name, tag description and tag group
Composition
Array of mole fractions of the first 55 components as used
in the standard.
1: Methane
2: Ethane
3: Propane
4: n-Butane
5 2-Methylpropane
6: n-Pentane
7: 2-Methylbutane
8: 2,2-Dimethylpropane
9: n-Hexane
10: 2-Methylpentane
11: 3-Methylpentane
12: 2,2-Dimethylbutane
13: 2,3-Dimethylbutane
14: n-Heptane
15: n-Octane
16: n-Nonane
17: n-Decane
18: Ethylene
19: Propylene
20: 1-Butene
21: cis-2-Butene
22: trans-2-Butene
23: 2-Methylpropene
24: 1-Pentene
25: Propadiene
26: 1,2-Butadiene
27: 1,3-Butadiene
28: Acetylene
mol/mol
0
Содержание flow-x
Страница 1: ...Function Reference Certified flow calculations Flow and batch calculations Worksheet functions...
Страница 331: ...Flow X Function Reference 5 331 Flow X IO Functions fxPT100Table...
Страница 349: ...Flow X Function Reference 6 349 This page is intentionally left blank for user notes...
Страница 350: ...6 350 Flow X Function Reference This page is intentionally left blank for user notes...