AC glycol chiller conversion
Just been experimenting with this recently. Took apart a 12,000 btu AC and put the evaporator in a cool box, and filled with water for my first experiment although next test will be with propylene glycol. Using an inkbird temperature controller to monitor the evaporator coil temperature (set at minus 4 oC) and turn the lamp on and off as a heat source which activates the AC temp probe next to it.
My plan is to use the chiller primarily for cold crashing 500 lts of beer. I'm planning to buy an submersible aquarium pump which will be left on constantly to recirculate minus 2 centigrade glycol around the internal coils of the fermenter during cold crash.
Any tips on this? I assume my 34 litre cool box will be large enough considering the pump will be on constantly allowing continuous heat exchange for the glycol with the evaporator coil.
My one concern is, will the evaporator freeze up internally if it gets too cold? Say minus 10 centigrade?
Just been experimenting with this recently. Took apart a 12,000 btu AC and put the evaporator in a cool box, and filled with water for my first experiment although next test will be with propylene glycol. Using an inkbird temperature controller to monitor the evaporator coil temperature (set at minus 4 oC) and turn the lamp on and off as a heat source which activates the AC temp probe next to it.
My plan is to use the chiller primarily for cold crashing 500 lts of beer. I'm planning to buy an submersible aquarium pump which will be left on constantly to recirculate minus 2 centigrade glycol around the internal coils of the fermenter during cold crash.
Any tips on this? I assume my 34 litre cool box will be large enough considering the pump will be on constantly allowing continuous heat exchange for the glycol with the evaporator coil.
My one concern is, will the evaporator freeze up internally if it gets too cold? Say minus 10 centigrade?
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