Planning for Fermentation Temp Control - Need some veteran advice - Home Brew Forums
Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > Planning for Fermentation Temp Control - Need some veteran advice

Reply
 
Thread Tools
Old 02-19-2009, 06:53 PM   #1
mjn12
Recipes 
 
Nov 2008
Posts: 57
Liked 2 Times on 2 Posts



I'm looking at building a simple temp controlled fermentation cabinet. This is just for the next few months until I'm out of college, I don't want to buy freezers and lug them around with me when I get a real job.

Instead of just sticking an AC unit into the box and controlling it that way I think I might be able to save a lot of space in my tiny apartment by gutting a mini fridge and putting the cold heat exchanger in the cabinet while obviously keeping the rest of the components outside.

Does anyone have any experience with hacking mini fridges like this? I'm assuming its not feasible to remove the coolant from the system, re-plumb it and then repressurize so I might have to work with the shape and routing of the current system, which might not be a big issue anyways.

In the interest of saving some more dough I'm looking at using a microcontroller with temp probe as a simple PID controller. This could also give me some extra things like temp data logging, etc.

Any advice?



 
Reply With Quote
Old 02-19-2009, 06:58 PM   #2
mjn12
Recipes 
 
Nov 2008
Posts: 57
Liked 2 Times on 2 Posts


Also, anyone know anything about peltier cooling? Perhaps if I could find a big enough peltier cooler it could give me the ~5 degree temp difference to keep an ale at 65-68deg in a 68-72 degree room (plus and heat released from fermentation).



 
Reply With Quote
Old 02-19-2009, 08:25 PM   #3
chumprock
Recipes 
 
Dec 2008
Rochester, NY
Posts: 1,035
Liked 35 Times on 24 Posts


1. You could extend the fridge by cutting a side wall:

http://www.homebrewtalk.com/f51/4-6-...version-88554/

2. I'm looking into the peltier option, but only because I have a slightly broken peltier cooler. (though I'm having a hell of a time finding the replacement part that broke)

I'd be interested to see which way you went as I'm looking to do something similar. Come May our Craigslist piles up with dorm fridges.

 
Reply With Quote
Old 02-19-2009, 09:19 PM   #4
TwoHeadsBrewing
Recipes 
 
Feb 2008
Chico, CA
Posts: 3,924
Liked 37 Times on 34 Posts


I did this one in my garage, but no reason you couldn't do something similar in a cabinet indoors.

http://www.homebrewtalk.com/f11/new-...-build-102846/
__________________

Fermenting: ESB
Kegged: Extra IPA, Brown Ale, American Wheat, Blackheart Stout
Coming Up: Dunkleweizen, 3C Pale Ale


DIY Fermentation Chamber
More Brew Stuff

 
Reply With Quote
Old 02-20-2009, 03:57 PM   #5
eccsynd
control freak
HBT_LIFETIMESUPPORTER.png
 
eccsynd's Avatar
Recipes 
 
Apr 2008
Minnesota
Posts: 172
Liked 1 Times on 1 Posts


PID algorithms aren't necessarily the best choice for controlling a compressor, they typically switch too often. You're usually better off with a more simple differential hysteresis.

Yuri did some experiments a while back with peltier cooling, a good read:
http://www.homebrewtalk.com/f51/diy-...control-27524/


__________________
BCS-460 Temperature Controller - Interactive web based interface, data logging, and programmable control rules.
http://www.embeddedcc.com
Become an ECC fan on Facebook

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fermentation Temp Control TheBelly Fermenters 6 11-02-2009 10:38 AM
Advice on Planning Fermentation Time. Sediment Beginners Beer Brewing Forum 6 03-25-2009 06:04 AM
Some interesting advice from a brew shop...use a trash can for temp control? TravelBastard Beginners Beer Brewing Forum 7 10-17-2008 06:15 PM
Advice Please: Next Purchase Kegs or Temp. Control postman Equipment/Sanitation 13 08-15-2008 05:59 PM
Advice needed: ice water bath for fermentation temp. control wolfboy Beginners Beer Brewing Forum 3 04-22-2008 08:36 PM


Forum Jump