Glycol Cooling Systems

Glycol cooling is typically required in most distilleries. It plays a vital roll in all processes from mash cooling through the fermentation process and then during the distilling process.

1.      Mashing: It is necessary to cool the mash or the wort down to yeast pitching temperatures. This can be accomplished in the mash tun, in-line to the fermenter, or in the fermenter.

Depending on your city water temperature, glycol cooling may be required.

2.      Fermenting: When yeast begin the fermentation process the temperature will begin to rise in the fermenter. Once the fermentation reaches the peak the temperature can rise to levels that will kill the yeast cells and also produce off flavors unless glycol is used to maintain the desired fermentation temperature.

3.      Distilling: During the distillation process it is necessary to provide cooling for the dephlegmating process and the condensing process. Depending on the size of the still and the location of your distillery, glycol will likely be required.

The still's cooling requirements will be a large load on a glycol chiller. It may be required to use a cooling tank and heat exchanger or air/glycol external unit to buffer the heat going back to the chiller. Using a cooling tower may also be an option to reduce glycol chiller loads. This will depend on the dew point in your area.

Glycol chiller sizing is a vital part of the distilling operation. This is why we have partnered with Pro-refrigeration to properly size the glycol chillers based on the total required loads.


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