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tknorr
05-18-2010, 09:47 AM
What temp should our glycol in our resevoir be? we have schedule 80 insulated pvc. my refir guy said if i can give him the glycol temp i want to achieve he can work backwards with that number to get what he wants the evaporator temp to be. We added too much water to our glycol last year when we set it up so we are adding pure glycol now to get the ratio right and get rid of the ice bank on our coils in the resevoir to run more efficiently. Thanks Tom-Evolution Craft Brewing Company

BrewinLou
05-18-2010, 10:34 AM
I have ours set on 27-30 depending on time of year. With the glycol freeze point mixed to the mid teens. That was the recommended settings per our manufacturer Pro Refrigeration.

jimvgjr
05-18-2010, 12:31 PM
Like Joel said, most of our customers operate the chillers at a T-Stat set point in the 27-30 F range.

You want the Freeze Point of the solution to be 20 F or 25 F below your Set point Temperature- so at 27 F set point the Freeze Point should be in the +2 to +7 F Range or Glycol Percentage in the 30-35% range. You need this buffer because the refrigerant temperatures will be much lower than glycol temperatures.

You can download a chart here:

http://www.prochiller.com/reGlycolChart.html

Good Luck,

Jim
Pro Refrigeration Inc.
jimvgjr@prorefrigeration.com

Woolsocks
05-19-2010, 12:31 PM
Ours is -1C but that's only cold enough to get the beer in our fermenters to about 1-2C. I'd ideally like it colder; you might want to do that as well if you want to get your beers down to the "proper" cold-conditioning temp of -2C