MTEK6000 SERIES USER'S MANUAL
APPENDIX B: CALCULATIONS
AGA-7 Volume Calculations
The MTEK6000 EFC performs volume calculations based on the Ideal Gas Law. Boyle’s Law is used for pressure and Charles’s Law for temperature. These laws state that the volume of any definite weight of a perfect gas varies inversely with change in absolute pressure and directly with change in absolute temperature. The unit can perform such calculations for turbine, rotary, and diaphragm displacement meters.
Vc = Vu x (Pm + Pa) x Tb + 459.67 x (Fpv)2
| Pb | Tm + 459.67 |
Where: |
|
|
Vc | = Volume corrected to base conditions | |
Vu | = Uncorrected line volume | |
Pm | = Measured line pressure (psig) | |
Pa | = Atmospheric pressure | |
Pb | = Base pressure | |
Tb | = Base temperature (0F) | |
Tm | = Measured line temperature (0F) | |
Fpv | = Supercompressibility factor | |
The unit makes continuous correction for the specified gas composition based on actual sensed pressure and temperature.
NOTE
All of the AGA factors can be based on either flowing or constant values.
The supercompressibility factor can be calculated from either
NX19 Supercompressibility Report
The EFC is configured with values for specific gravity, mol percent of N2 and CO2.
January 2002
The EFC is configured with values for BTU content, specific gravity and mol percent of CO2.
The EFC is configured with values for specific gravity and mol percent of N2 and CO2.
