. FE-ISO6976-DLL performs the calculation of natural gas properties completely in accordance with:
PROPERTIES |
Property |
Set property value |
Get property value |
I |
X(I): mole fraction for |
0 |
Methane |
void SetFractionValue(short I, double X(I)) |
double GetFractionValue(short I) |
1 | Ethane |
2 | Propane |
3 | n-Butane |
4 | 2-Methylpropane |
5 | n-Pentane |
6 | 2-Methylbutane |
7 | 2,2-Dimethylpropane |
8 | n-Hexane |
9 | 2-Methylpentane |
10 | 3-Methylpentane |
11 | 2,2-Dymethylbutane |
12 | 2,3-Dymethylbutane |
13 | n-Heptane |
14 | n-Octane |
15 | n-Nonane |
16 | n-Decane |
17 | Ethylene |
18 | Propylene |
19 | 1-Butene |
20 | cis-2-Butene |
21 | trans-2-Butene |
22 | 2-Methylpropene |
23 | 1-Pentene |
24 | Propadiene |
25 | 1,2-Butadiene |
26 | 1,3-Butadiene |
27 | Acetylene |
28 | Cyclopentane |
29 | Methylcyclopentane |
30 | Ethylcyclopentane |
31 | Cyclohexane |
32 | Methylcyclohexane |
33 | Ethylcyclohexane |
34 | Benzene |
35 | Toulene |
36 | Ethylbenzene |
37 | 0-Xylene |
38 | Methanol |
39 | Methanethiol |
30 | Hydrogen |
41 | Water |
42 | Hydrogen sulfide |
43 | Ammonia |
44 | Hydrogen cyanide |
45 | Carbon monoxide |
46 | Carbonyl sulfide |
47 | Carbon disulfide |
48 | Helium |
49 | Neon |
50 | Argon |
51 | Nitrogen |
52 | Oxygen |
53 | Carbon dioxide |
54 | Sulfur dioxide |
55 | Dinitrogen monoxide |
56 | Krypton |
57 | Xenon |
Mixture analysis |
Set property value |
Get property value |
N |
Description |
0 |
Mole fractions |
void SetMixtureAnalysis(short N) |
short GetMixtureAnalysis() |
1 | Volume fractions |
2 | Mass fractions |
Combustion/metering operating conditions |
Set property value |
Get property value |
N |
Description |
0 |
15°C/15°C and 101.325 kPa |
void SetCombustionMeteringConditions(short N) |
short GetCombustionMeteringConditions() |
1 | 0°C/0°C and 101.325 kPa |
2 | 15°C/0°C and 101.325 kPa |
3 | 25°C/0°C and 101.325 kPa |
4 | 20°C/20°C and 101.325 kPa |
5 | 25°C/20°C and 101.325 kPa |
Protection key | void SetKeyCode(long nNewValue) |
n/a |
Error status | n/a |
long GetErrorFlag() |
Results
| Set property value |
Get property value |
I |
Description |
0 |
Superior calorific value - molar basis [kJ/mol] |
n/a |
double GetResults (short I) |
1 | Inferior calorific value - molar basis [kJ/mol] |
2 | Superior calorific value - mass basis [MJ/kg] |
3 | Inferior calorific value - mass basis [MJ/kg] |
4 | Superior calorific value - volumetric basis [MJ/m3] |
5 | Inferior calorific value - volumetric basis [MJ/m3] |
6 | Molar mass [kg/mol] |
7 | Compression factor |
8 | Relative density |
8 | Density [kg/m3] |
10 | Molar density [kg-mole/m3] |
11 | Wobbe index [MJ/m3] |
FUNCTION |
Function prototype |
long CalculateIso6976(); calculates natural gas properties and returns long int error status |
ERROR STATUS |
Error status bits are cleared or set upon execution of the function CalculateIso6976(). |
long GetErrorFlag() bits |
Description of Error/Warning flags. |
Bit 0 =1 (0001H) |
Error: Total sum of mole fractions <0.98 or >1.02. |
Bit 1 =1 (0002H) |
Warning: Total sum of mole fractions is not exactly equal to 1. This bit denotes only the warning that the fractions have been normalized to give the total sum of mole fractions equal to 1. If only bit 2 was set during the calculation the results are valid. |
Bit 2 =1 (0004H) |
Error: Mole fraction of Methane <0.5 or >1.0. |
Bit 3 =1 (0008H) |
Error: Mole fraction of Nitrogen <0 or >0.3. |
Bit 4 =1 (0010H) |
Error: Mole fraction of Carbon Dioxide <0 or >0.15. |
Bit 5 =1 (0020H) |
Error: Mole fraction of Ethane <0 or >0.15. |
Bit 6 =1 (0040H) |
Error: Mole fraction of any other mixture component {X(2),...,X(50),X(52),X(54),...,X(57)} is <0 or >0.05. |
Bit 7,...,Bit 23 |
Unused. |
Bit 24 =1 (1000000H) |
Error: Incorrect protection key. |
Bit 25,... |
Bit 25 and all higher bits are unused. |