10GPM flow in a tank jacket for that size tank is incredibly fast. Do the math on the therm of the tank, we run 20bbl tanks with no issues at roughly 1.5gpm. According to the calculations, this provides adequate cooling to run the tank at it set point during full ferment, as well as crash the tank at a rate of 10 degrees in 12 hours, which is the correct rate. Running at 10GPM means you're wasting your money on a way oversized pump. That said, if you had much larger tanks, say 100bbl tanks, 10gpm would probably be about right when all jackets are running. At 10 GPM, with glycol at 28F with even just a 2F rise in temperaure, that is nearly 10,000 BTUH, quite a substantial overkill for even the smallest tank.
As for a 24F glycol temperature, you're definitely going to freeze things with this. Check your inlet temperature to make sure it is higher than 26 or 27F, if it is down at 25F, you run the risk of freezing beer to the coils directly, then you loose a ton of cooling efficiency.
As for a 24F glycol temperature, you're definitely going to freeze things with this. Check your inlet temperature to make sure it is higher than 26 or 27F, if it is down at 25F, you run the risk of freezing beer to the coils directly, then you loose a ton of cooling efficiency.
Originally posted by UnFermentable
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