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Calculating Dilution

Calculating Dilution

Calculating Dilution

I need your help! I'm an EE playing a ChemE. sad

I'm trying to calculate the dilution factor of two gasses. I have a gas that is mixed with zero air using a timed valving scheme. Both the gas and zero air use a common flow rate(200ml/min). This is plumbed in such a way that the output of the previously described gas is ran into a three-way inlet with zero air at a variable flow rate(X). My questions is how do I calculate the final dilution factor if I know the stage one flow rates, the initial dilution factor, and the second stage zero air flow rate?

Thanks to anyone that can help me!


RE: Calculating Dilution

Hello Eric,

do I understand your setup correctly? (attachment)

If yes, then the final dilution factor is:
DF(final) = DF(initial) * (200 + 200 + x) / 200

E.g. if your initial DF is 1 (no dilution) and the x = 0, you get a dilution of 2 ie. your gas is diluted twice.

(I have used the definition of dilution factor as "ratio of the mixture volume and the specific component volume")

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