Calculating Moisture
Calculating Moisture
(OP)
Task:
Verify the output flow of a flow meter.
Problem:
I don't know how to begin to calculate the amount of water that can be held in a multi species gas stream. I know all the components, and mass fractions on a "Dry" basis. I also know the temperature and pressure of the gas stream. The gas stream is also at its saturation point "as I was told" Can anybody point me to an online reference to help me with this. Thanks to all.
Verify the output flow of a flow meter.
Problem:
I don't know how to begin to calculate the amount of water that can be held in a multi species gas stream. I know all the components, and mass fractions on a "Dry" basis. I also know the temperature and pressure of the gas stream. The gas stream is also at its saturation point "as I was told" Can anybody point me to an online reference to help me with this. Thanks to all.





RE: Calculating Moisture
The "gas saturation point" assumption usually sucks. A gas will be at 100% RH at the surface of the last place there was a coherent gas/liquid interface. A short distance from that coherent surface is less than 100%. As pressure and temperature change, the 100% RH content changes dramatically. If the change puts you over 100% RH then you'll have condensation. If the next change increases the 100% RH point (e.g., the pressure is lower at a constant temperature) then without a coherent gas/liquid interface then the RH will just drop.
RE: Calculating Moisture