I've been working on this fermentation chamber this week for a Blonde Ale I just brewed. Due to the temp fluctuations, I moved the ale back to my swamp cooler, but I am vested in getting this changer to work.
Here is the overview of the chamber:
I added 2" foam-board insulation over the insulation you see there, but I am still having issues with the ice in the 2 liter soda bottles melting too quickly and the chamber jumping from 18-19C to 23-24C.
I spent most of last night sealing any gaps I may have between the insulation, but this morning it was at 21.5C and the bottles were cold, but still melted.
My current plan is to take a panel of insulation and cut a small square into it for the fan I made here:
However, do I need to have two fans to have a push-pull effect to circulate air? Would sealing the ice in the fridge have the effect I want in keeping the ice longer? Am I way off mark here? When I tested the fridge with the door on, it reached close to 0C easily. If installing the foam panel works, I have an idea of turning the fridge sideways so the door is facing out parallel to the face of the chamber and cutting a square in the side of the fridge for the fan. This way I can change the ice without opening the lid of the chamber itself.
Thanks in advance for any tips and suggestions.