Fermentation temperature control!

Discussion in 'Homebrewing' started by mikehartigan, May 7, 2012.

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  1. mikehartigan

    mikehartigan Maven (1,421) Apr 9, 2007 Illinois

    I brewed a DIPA for Big Brew yesterday. After adding 5# of honey, OG was 1.098. I pitched 2 packets of Windsor. After 8 hours, fermentation was fast and furious! Have you ever sniffed the aroma from the airlock in a hop heavy beer? My entire basement smells like that today!!! the only problem is the that temperature of the fermenting wort is 82F!!! Too late to fix this batch. My next upgrade is fermentation temperature control. I'm using a 14.3 gal SS conical fermenter with a thermowell. What's the best approach gIven my current setup?
     
  2. yinzer

    yinzer Initiate (0) Nov 24, 2006 Pennsylvania

    Yeah, that's not good at all.

    I guess that there are three approaches. A refrigerator/chamber, wrap coils around the conical and run glycol through it or make an immersion chiller.

    What conical is it?
     
  3. rmalinowski4

    rmalinowski4 Pundit (753) Oct 22, 2010 Illinois

    Cost effective way, built it your self using a dorm fridge, wood to build a box, insulation to keep the temp, and a temp controller to set the temp. There is a bunch of info on homebrew talk in the DIY section. I just built my temp controller and use a small 5 cu. ft. chest freezer as the chamber. Holding temp between 66 and 68 without a problem.
     
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  4. JCTetreault

    JCTetreault Initiate (0) Mar 19, 2008 Massachusetts

    82F? ouch. ideally an upright fridge or freezer w/ temp controller. no need to anything more fancy than that w/ that size fermenter.
     
  5. mikehartigan

    mikehartigan Maven (1,421) Apr 9, 2007 Illinois

    It's the 14.3 gal from conical-fermenter.com. It's too big for a dorm fridge. An upright fridge or freezer may be the simplest solution. Would It be good enough to control the temperature of the chamber, or would I be better off using the thermowell?
     
  6. thamajam

    thamajam Aspirant (267) Apr 2, 2010 Wisconsin

    Here how not to do it:

    [​IMG]

    It dropped the temps about 10 degrees, same situation I was at about 80 after 1.5 days of fermentation and needed to get it cool on the cheap. But seriously I need an upright freezer and a temp controller lol.
     
  7. kjyost

    kjyost Initiate (0) May 4, 2008 Canada (MB)

    If you've got that much thermal mass there, it would be best to take the temp of the fermenting wort itself, as you can easily get major temperature differentials within the wort. For my 5 gallon batches, I keep the probe attached to the outside with insulation to keep the cold air away...
     
  8. rocdoc1

    rocdoc1 Savant (1,215) Jan 13, 2006 New Mexico

    Leave the beer in primary a long time and it will clean up a lot of the fusels. I had an imperial stout(1.110 OG) that got up to 85F for at least a day. It hit FG in 2 weeks but tasted like kerosene. 2 more weeks in primary and all the kerosene flavors were gone, the beer was delicious.
    A for a fermentation chamber I built this for my big conical. I can keep my internal temps as low as 55F in my 100F garage using the thermowell.
    [​IMG]
     
  9. hopfenunmaltz

    hopfenunmaltz Pooh-Bah (2,635) Jun 8, 2005 Michigan
    Pooh-Bah

    That looks like a window AC for the cooling, right? What temp control unit do you use, and can it take the start up spike?

    Have an old AC unit sitting in the basement. Might put it to work.
     
  10. yinzer

    yinzer Initiate (0) Nov 24, 2006 Pennsylvania

    Let us know how you like it. I have their kettle and like it.
     
  11. ryane

    ryane Initiate (0) Nov 21, 2007 Washington

    Yikes 82F is pretty hot, any reason you couldnt have added all that honey after a majority of the fermenation has died down? It would really help quite a bit with the temperature.
     
  12. rocdoc1

    rocdoc1 Savant (1,215) Jan 13, 2006 New Mexico

    It's just a $100 8000BTU unit from Home Depot. I've used a Johnson controller with it, now I have a 2 stage(Ranco possibly) from morebeer.com, and I've never had issues with either of them.
    The next one I build will be from a dead upright freezer, it will be better insulated and the door will seal better. But I've been using this one for about 4 years now and it works well enough.
     
  13. hopfenunmaltz

    hopfenunmaltz Pooh-Bah (2,635) Jun 8, 2005 Michigan
    Pooh-Bah

    Thanks. I might do something like this for fermenting lagers in the summer. Chest freezer is full of beer right now.
     
  14. mikehartigan

    mikehartigan Maven (1,421) Apr 9, 2007 Illinois

    I hate when that happens! :wink:
     
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