Flow measurement using differential pressure in orifice plate flow meters
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For a reciprocating new hydrogen compressor, at the same inlet pressure and inlet temperature, when nitrogen and hydrogen are fed as the inlet gas, what is the difference in the standard flow rates indicated at the outlet? (The outlet flow density is calibrated based on hydrogen.) How can this difference be estimated approximately?
The difference lies in the densities of nitrogen and hydrogen; by replacing the density of hydrogen with that of nitrogen in the flow rate calculation formula, the flow rate of nitrogen can be determined. This is an approximate method. For accurate measurement, if the medium differs while other parameters remain the same, the orifice plate will also be different, and the same parameters cannot be used as a substitute. It is necessary to replace the orifice plate or calibrate new parameters using nitrogen. .
N2 range = H2 range x SQRT(28/2)
Same question, have the same doubts~~