Help Calculating time to recharge air tanks

[pfreivald]

Originally Posted by Pratik341

Using the function that Excel generated, the integral from 0-120 yields 88.332 seconds for a full charge from 0-120 psi.

I'm tired and don't feel well, which is why I'm not doing the math myself, but something seems fishy to me about just integrating that curve and getting an answer because it's independent of the size of your storage tanks. The integration also doesn't yield time.

You've got volume/minute on the Y axis, and pressure on the X axis, so the integration will yield units of volume*pressure/time, or power (in the charming non-SI unit of inch-lbs/minute)--not time.