The Contrec 515 GN06 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 volumetric flow methods along with analog temperature and pressure sensor inputs.
It calculates the flow using standard differential pressure equations, taking into account the specific conditions under which the flowmeter was calibrated.
To ensure precise measurements, the AGA-8 Detail Characterization Method is employed to determine accurate values for density and compressibility factors, which are essential for flow calculations.
CALCULATIONS
The calculations for gas density and compressibility factors are derived from the AGA-8 equations. These calculations are applicable within the following ranges:
-130°C < t < 400°C, P < 280MPa
-200°F < t < 760°F, P < 40000psia
FORMULAS
Mflow = volume flow • 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
