This calculates an observed volume flow rate of a gas to a mass, standard volume, normal volume or energy flow rate.
Kelton calculation reference C248
- Observed volume
- Standard volume
- Normal volume
This option group is used to select which flow rate(s) are needed to be output.
- Volume correction factor
This option allows the user to select whether to calculate a volumetric type flow rate using the equivalent gas density or by using a volume correction factor.
Calculate mass using
- Line density
- Standard density
Volume correction factor
- User entered
This option allows the user to enter a volume correction factor or have it calculated using PTZ inputs.
- Volume based
- Mass based
This option allows the user to enter either a volume or mass based calorific value when calculating energy flow rate.
- User entered
- Input as relative density
This option allows the user to select whether to enter standard density or enter a relative density, which will then be used to calculate standard density.
Mass Flow Rate
The mass flow rate is calculated by:
If the density is calculated it is done by:
If the volume correction factor is calculated it is done by:
|P||=||Pressure at line conditions|
|Pb||=||Pressure at base conditions|
|T||=||Temperature at line conditions|
|Tb||=||Temperature at base conditions|
|Z||=||Compressibility at line conditions|
|Zb||=||Compressibility at base conditions|
|ρ||=||Density at line conditions|
|ρb||=||Density at base conditions|
|Qv||=||Observed volume flow rate|
Standard Volume Flow Rate
The standard density is calculated by:
If the density method option is selected:
If volume correction factor option is selected:
Energy Flow Rate
The energy flow rate is calculated by:
If volumetric calorific value is applied:
If mass based calorific value is applied: