cool down time calculation
cool down time calculation
(OP)
I'm looking for a simple calculation to help me figure out the time it takes to cool a solution in a tank to a certain temperature.
For example, I have a 100 gallon tank of 125 deg F USP water and want to cool it to 70 deg using 15 GPM water at 60 deg F and 15 GPM. How long would this take?
For example, I have a 100 gallon tank of 125 deg F USP water and want to cool it to 70 deg using 15 GPM water at 60 deg F and 15 GPM. How long would this take?





RE: cool down time calculation
Patricia Lougheed
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RE: cool down time calculation
RE: cool down time calculation
This amounts to blending masses of water until the desired temperature is achieved. For no mass leaving the system then:
m1*T1 + m2*T2 = (m1+m2)*T3,
since the specific heat of the water is fairly constant. From the mass required to balance the equation you can calculate the time required based on your GPM.
RE: cool down time calculation
Good luck,
Latexman
RE: cool down time calculation
It's more of an indirect heat transfer problem. It's a jacket type tank with USP water inside (stationary)at 125 deg and 15 GPM water at 60 deg circulating thru the jacket, I'm assuming 3/4" tubing thru the jacket since that's the connection size on the outside of the tank. After the USP water is cooled to 70 deg, circulation is turned off.
Thanks for the suggestions, I'll refer to these references.
RE: cool down time calculation
Good luck,
Latexman