The Contrec 515 GN03 is a reliable application for measuring the volume, mass, and total heat content of natural gas. This advanced instrument utilizes single or stacked differential pressure mass flow inputs along with analog temperature and pressure sensor inputs.
It calculates the gas flow using standard differential pressure equations, taking into account the specific conditions under which the flowmeter was calibrated.
To ensure precise flow calculations, the AGA-8 Detail Characterization Method is employed to determine accurate values for density and compressibility factors.
CALCULATIONS
The calculations for gas density and compressibility factors are based on the AGA-8 equations, which are applicable within the following ranges:
-130°C < t < 400°C, P < 280MPa
-200°F < t < 760°F, P < 40000psia
FORMULAS
Volume flow = Mflow / ρflow
Corrected flow = Mflow / ρ ref
Heat flow = Mflow • Hm
Where:
Mflow = mass flow
ρflow = density at flow conditions
ρ ref = density at reference conditions
Hm = mass gross heating value
