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 |