Issues with temperature and pressure compensation and standard cubic Nm3/h
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It’s simple to perform temperature and pressure compensation on a certain flow rate in a DCS, but if one has to calculate it manually, then a formula for temperature and pressure compensation is needed. So what is that formula for temperature and pressure compensation? The unit for compressed gas flow rate is generally m3/h; if temperature and pressure compensation is applied to the compressed gas flow rate, then what becomes its unit? The unit for steam flow rate is generally kg/h; if temperature and pressure compensation is also applied to the steam flow rate, then what is its unit? Should it be kg/h or Nkg/h?
What is compensated is the gas equilibrium equation; for details, refer to Chemical Engineering Principles. The gas needs to be adjusted to standard conditions, so the unit after adjustment is Nm3/h. The mass flow rate after steam compensation is the value at the designed operating condition; therefore, the unit remains kg/h
There are voltage stabilization compensation formulas in DCS, which can be applied directly
This can be solved using the ideal gas law! If PV/T = PV/T, convert using standard conditions…
Just calculate using the formula on the fifth floor