Measuring and calculation of high-pressure gas flow rate taking into account the real properties of the gas

This article presents a method for measure and calculation gas flow rate at high pressures (20–90 MPa) considering the real gas properties. The impact of the compressibility factor on measurement accuracy is discussed, and various equations of state for its calculation are analyzed. Experimental studies have shown that using the Peng–Robinson equation with a shift parameter significantly reduces the systematic error in measurements. The developed method allows for gas flow measurement with an accuracy up to 5 % when using 0.1 accuracy class pressure sensors.
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