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Predicting Air Flowrates from Gas Flowrates

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bigplans

Mechanical
Joined
Oct 1, 2020
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Imagine I have dataset of flow (mass flow and derived scfm), pressure, and temperature at specific time intervals from a compressor running throughout its full range. The fluid is natural gas, with a specific gravity of lets say 0.8. The compressor is used to depressurize a section of piping, and discharges into another section of piping that is flowing.

I want to use this data to predict or approximate the flow of air in scfm through the same unit at the same pressures, temperatures and time intervals. Is there a simple relationship between standard flows of two fluids, such as multiplying by specific gravity? Or can I use the ideal gas law in some way?
 
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