Issues regarding the calibration of the mass flow meter in the circulating hydrogen pipeline
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I would appreciate it if experts in instrumentation could help answer this question. We are using an online mass flow meter for our recycled hydrogen stream, but it was calibrated based on a gas composition of 30% H2, 50% ethane, 10% benzene, and 10% water. However, it turns out that the actual composition of our gas is 40% H2, 15% methane, 15% ethane, 15% benzene, and 15% water. They are all expressed as mass percentages. If my flow meter shows 100 kilograms per hour, then what would the equivalent amount be in terms of my actual composition, in kilograms per hour?
The mass flow meter shows the actual mass, right? The total mass remains 100 kilograms; no conversion is needed! Has the original poster solved it?
First, you say there is water – what state is it in? Liquid or gas? If it is in gaseous form, then there’s nothing to worry about – a mass flow meter is designed to measure mass, and it doesn’t depend on the composition of the medium. If it is liquid water, then a two-phase flow exists, which may indicate a problem. Second, it is difficult to correct a mass flow meter using any particular gas, as from a measurement principle perspective, there is no difference between gases and liquids. **The only recognized calibration method for mass flowmeters is the liquid mass accumulation method, and the accuracy of standard meters for gaseous media is inferior to that of mass flowmeters. So go ahead and use it boldly.