METHOD FOR MEASURING VOLUMETRIC FLOW OF NATURAL GAS UNDER STANDARD CONDITIONS Russian patent published in 2005 - IPC

FIELD: flow measurements.

SUBSTANCE: method includes mounting narrowing device in measuring portion of pipeline with given cross-section, moving gas flow is throttled, absoluter h\gas pressure to narrowing device is measured, pressure change on narrowing device and gas temperature in gas flow recording node in pipeline network on side of consumer, also gas temperature is measured in recording node on the side of provider, standard volumetric gas flow for one cycle is determined from data measured at consumer side, from equation additionally determined is difference of gas temperatures in recording nodes at consumer side and provider side for one measurement cycle in synchronous time intervals, and standard volumetric gas flow measured in consumer count node is corrected on basis of equation where q_c1, q_c2, C_q1, p₁, Δp₁, ρ_c, K₁, T₁, Т₂ - respectively: volumetric gas flow under standard conditions on side of consumer, volumetric gas flow under standard conditions with gas temperature correction, constant coefficient of equation for inter-check time period, gas pressure in pipeline, change of gas pressure at narrowing device, gas density under standard conditions, compression ability coefficient, absolute gas temperature for measurements cycle in synchronous time range in nodes for recording consumer and provider data.

EFFECT: higher precision.