Flow rate of natural gas flow meter
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The facility is supplied with natural gas, and a flow meter has been installed on-site; as shown in the figure, these are the flow data from the meter. May I ask which value should be used to determine the gas flow rate – the operating conditions or standard conditions? Is the operating condition so different from the standard condition? Those who know please let me know, thank you
Under standard conditions, this refers to the standard conditions that are derived from the temperature and pressure under specific operating conditions. Standard conditions serve as the basis for the final conversion, as the flow rate varies under different pressures and temperatures. Refer to the equation PV/T = constant, T (thermodynamic temperature 273 + °C) K
The operating conditions are measured, based on the temperature and pressure during operation； Under standard conditions, the conversion is done using the gas equation; generally, comparisons are made under standard conditions for measurement purposes.
Isn’t the unit for standard conditions incorrect? It should be Nm³/h
The basic principle is that measurements or material balances should be carried out as much as possible under standard conditions； The process operation can be carried out under standard conditions or actual operating conditions, but measurement must be done consistently in both the upstream and downstream streams.