Just to prove I've been listening to the sage advice (@foxy and others) about the importance of fermentation temps, I'm making steady progress on a design based on a heat exchanger coil plumbed in to the FV. For various reasons this had more change of approval by the management than a FermFridge
So at the weekend I finished the coil itself, made from 10m of 1/4" tubing. In fact the flow resistance of this stuff is pretty high, so to avoid overworking the pump I'm using two 5m runs in parallel (also, two small pipes have more surface area than one larger one).
The cross-pieces at the bottom are to keep it central in the FV by the way.
Next step is to hook the coil up to the pump and the Peltier heater/cooler. It's a 60W device (12V, 5A) so for a 30 litre brew I think that should correspond to a heating/cooling rate of 2ºC perminute hour. I think that should be adequate, but if not then I do have a second device to add in parallel.
So at the weekend I finished the coil itself, made from 10m of 1/4" tubing. In fact the flow resistance of this stuff is pretty high, so to avoid overworking the pump I'm using two 5m runs in parallel (also, two small pipes have more surface area than one larger one).
The cross-pieces at the bottom are to keep it central in the FV by the way.
Next step is to hook the coil up to the pump and the Peltier heater/cooler. It's a 60W device (12V, 5A) so for a 30 litre brew I think that should correspond to a heating/cooling rate of 2ºC per
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