After flow, temperature, and pressure compensation, the flow rate under the subsequent operating conditions remains the standard condition flow rate.
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If it is the operating condition flow rate, then if the flow meter outputs this value, with the unit being M3/H, is it still necessary to perform compensation on this flow rate? If the flow meter outputs in NM3/h, then is compensation required? Is the variable after compensation the flow rate under operating conditions?
Thermodynamic compensation is used to achieve more accurate measurements; gases are generally converted to standard cubic units for display, in order to facilitate better statistical analysis.
The operating condition is the volumetric flow rate of the fluid passing through the flow meter. In the measurement of gases and vapors, temperature and pressure are used for compensatory calculations in order to determine the flow rate of the fluid under standard conditions (the mass of vapor can be determined as well).
Generally, standard conditions are shown to facilitate the measurement and conversion of gas volumes.
The flow rate of a gas at 1 atmosphere and 20 degrees Celsius (0 degrees Celsius is also used as the standard condition in some cases) is generally considered to be the standard condition flow rate. Since gases can be compressed, for a gas with the same flow rate under standard conditions, its volume varies at different pressures and temperatures in a closed pipeline; the higher the pressure, the smaller the volume, and thus the lower the volumetric flow rate. The flow rate of a gas at a certain temperature with a certain pressure (relative to one atmosphere) is commonly referred to as the operating condition flow rate.