Would be awesome to see some pix. Was just thinking about doing this myself! I'm especially interested to see how you built the glycol reservoir.
Try using a chest freezer to chill your glycol. Simply fill the chest freezer with a mixture of water and glycol (i.e. the chest freezer IS the reservoir and chiller), add a temperature controller to keep the freezer at or above 26 degrees F. Install an aquarium pump attached to a temperature controller for each fermentor/bright tank you have to recirculate the glycol. Costs about $300 to build, and all you have to do is drill the holes in the freezer for the glycol lines to exit/return. Very simple and easy.
I spoke with some glycol specialists. They informed me that a 500 gallon fermentor only has about 5 gallons of glycol in the jacket AND only needs about 10 gallons in reserve to keep the temperature at the required level. In other words, you wont need much glycol for a smaller scale operation.
On a side note, we all know the cheapest way to keep your fermentors at the appropriate temperature is to put them in a room with a window and buy a window A/C unit. Just keep the room at 64 degrees or so. Presto! $100 temperature controlled fermentation. No fuss, no muss!
Each A/C unit is going to be slightly different to wire but the basics are there on each. Took me a few trials confirm.
My setup... early in its life..
Its grown up since, but I don't have any recent pics, but at some point will post.
More details in my build thread.
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