C259 – AGA 7 & AGA 9 – Gas Flow Rate Calculation

Description

This calculates the volume, standard volume or mass flow rate of a gas as specified in AGA 7 Appendix B. Note that AGA 9 refers to AGA 7 for these flow rate calculations.

References

AGA Report No. 7 – Measurement of Natural Gas by Turbine Meters

AGA Report No. 9 – Measurement of Gas by Multipath Ultrasonic Meters

Kelton calculation reference C259

Options

Input flow rate

  • Volume flow rate at flowing conditions
  • Volume flow rate at base conditions
  • Mas flow rate

This option is used to select the input flow rate

Calculate

  • Volume flow rate at flowing conditions
  • Volume flow rate at base conditions
  • Mass flow rate

Two of these three options will be available for selection depending on the input flow rate

Calculation

Volume flow rate at base conditions

Depending on the flow rate input, volume flow rate at base conditions is calculated by:


or

Volume flow rate at flowing conditions

Depending on the flow rate input, volume flow rate at flowing conditions is calculated by:


or

Mass flow rate

Depending on the flow rate input, mass flow rate is calculated by:


or

Where
Pf = Absolute pressure at flowing conditions
Pb = Base pressure
Tf = Absolute temperature at flowing conditions
Tb = Base temperature
Zf = Compressibility at flowing conditions
Zb = Compressibility at base conditions
ρf = Density at flowing conditions
ρb = Density at base conditions

 

 

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