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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Easy carboy cooling method
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Old 10-05-2009, 01:48 PM   #1
ColoradoBill
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Default Easy carboy cooling method

So, I'm sure people have used this before, but I haven't read about it. I was fermenting and the temp went up a couple degrees yesterday. It was at 72 in a 7 gallon glass carboy. I wanted it closer to 68. Easy solution? I took a towel, soaked it in water and wrapped it around the carboy. Then took a fan and put it on over the carboy overnight. Worked like a charm. Got up this morning and it was 66 degrees.

Has anybody else noticed that during primary fermentation the temp goes up a couple degrees? It the reaction exothermic?

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Old 10-05-2009, 01:51 PM   #2
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Yes, we all have. Do search on "swamp cooler".

...and WELCOME!!

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Old 10-06-2009, 02:29 AM   #3
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And yes, fermentation is exothermic.

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Old 10-06-2009, 02:41 AM   #4
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It also makes heat.

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Old 10-06-2009, 02:53 AM   #5
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And it produces thermal energy.

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Old 10-06-2009, 02:56 AM   #6
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Which makes it warmer.

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Old 10-06-2009, 02:58 AM   #7
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I went one better on my first brew -- it was nearly 80 F in my house, so I bought an aquarium pump from the local pet store and set it up to pump water to the top of an old t-shirt wrapped around the carboy. Kept it soaked 24/7. This, plus a box fan, brought it down below 70 and kept it there til the heat passed.

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Old 10-06-2009, 03:24 AM   #8
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Quote:
Originally Posted by ChshreCat View Post
Which makes it warmer.
...and us on the inside...
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