Hopefully this is the proper forum to ask this. It's more of a scientific question, but it relates to "brewing science" in that I can apply it to dispensing my beer (i.e. draft system).
Suppose I have a 48" length of hose with an inside diameter of 3/16". The hose's supply end is 21.5" below its dispense end. Also suppose that the average flow resistance of such a hose is 2.25 lbs/ft. At the supply end, a pressure of 9.02 PSI is pushing liquid through the hose (assume the liquid is beer with a specific gravity of 1.010 g/cm^3).
1) What is the flow rate of the liquid at the dispense end?
2) What is the pressure (in PSI) at the dispense end?
3) Perhaps the more important question is, what pressure (in PSI) must be present at the dispense end in order to have a desired flow rate of 0.78 gal/min (with all of the specifics of the hose as described above)?
I would prefer formulas as opposed to just, "here's the answer." That way I can learn. Thanks!
Suppose I have a 48" length of hose with an inside diameter of 3/16". The hose's supply end is 21.5" below its dispense end. Also suppose that the average flow resistance of such a hose is 2.25 lbs/ft. At the supply end, a pressure of 9.02 PSI is pushing liquid through the hose (assume the liquid is beer with a specific gravity of 1.010 g/cm^3).
1) What is the flow rate of the liquid at the dispense end?
2) What is the pressure (in PSI) at the dispense end?
3) Perhaps the more important question is, what pressure (in PSI) must be present at the dispense end in order to have a desired flow rate of 0.78 gal/min (with all of the specifics of the hose as described above)?
I would prefer formulas as opposed to just, "here's the answer." That way I can learn. Thanks!