GERG 88 S
This equation requires the following fixed input variables:
standard calorific value (E07), standard density (E08), and the gas
fractions (in mol%) of carbon dioxide (E10) and hydrogen (E12).
AGA 8 Gross Method 1
This calculation method corresponds to GERG 88 S taking into ac-
count the absence of hydrogen;
E12, the percentage of H
2
= 0 -mol-%.
AGA 8 Gross Method 2
This equation requires the following fixed input variables:
standard density (E08), as well as the gas fraction (in mol-%) of car-
bon dioxide (E10) and nitrogen (E11). The hydrogen fraction is as-
sumed to be 0 mol-% in analogy to AGA8 Gross method 1.
AGA NX19-mod. (relative density)
This equation requires the following fixed input variables:
Relative density (E09), standard calorific value (E07), and the gas
fractions (in mol-%) of carbon dioxide (E10) and nitrogen (E11).
AGA NX19-mod. (standard density)
The input variables of this equation are:
standard density (E08), standard calorific value (E07), and the gas
fractions (in mol%) of carbon dioxide (E10) and nitrogen (E11).
GOST30319-2
This is a Russian standard to calculate the gas parameters. More
details can be found in the Russian manual.
Standard conditions
In Germany, standard conditions at which gas parameters must be
determined are defined. These standard conditions are for the pres-
sure (E20) 1.01325 bar and the temperature (E21) 0°C. In addition,
25°C applies as a standard combustion temperature for determining
the calorific value (E22).
Selection of standard pressure
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