Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > Hot/cold fermentation cabinet with TEC (peltier) module
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Old 03-28-2012, 01:54 PM   #21
JKoravos
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I think it's a pretty cool project, nice work.

That being said, I fooled around with the idea of doing the same thing with Peltiers, but once I started playing around with them I realized how many I would need and the amount of power it would take to cool any significant amount of fermenting wort was going to be ridiculous. You've kind of found the same thing, I see. Getting the chamber down to 8C with a carboy full of water is a much easier task than keeping a vigorously fermenting beer at 18C.

As a comparison, my ferment chamber is about twice the size of yours and it is cooled with a 5,000BTU air conditioner. The chamber gets down below -15C within a few minutes when the AC is running.

Have fun with the project, I hope it works out for you, but I just don't think Peltiers are well suited for this task.


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Old 03-28-2012, 03:31 PM   #22
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Quote:
Originally Posted by thargrav View Post
The end result is for every BTU you pull out like a heat pump the unit itself generates up to one BTU.
different way to say that peltier cells have low efficency...!


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Old 03-28-2012, 03:37 PM   #23
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Originally Posted by scaryeyes View Post
That will do as a heatsink for the cold side. Then.... The hot side.... Uh! Need to fill the entire back with expensive heatsinks and fans.
In my implementation there is no a side that is hot or cold…they revert themselves according to external temperature and set point
Ie when external temperature is to low the cabinet works like a oven…when the temperature is too high like a fridge..
This is one of the advantage of the peltier approach…off course you need a proper control board !
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Old 03-28-2012, 03:44 PM   #24
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[QUOTE=J.

As a comparison, my ferment chamber is about twice the size of yours and it is cooled with a 5,000BTU air conditioner. The chamber gets down below -15C within a few minutes when the AC is running.

Have fun with the project, I hope it works out for you, but I just don't think Peltiers are well suited for this task.[/QUOTE]

thank you for supporting my project...
5000 BTU is lot of cooling energy ! I just need to dissipate the heat produced by 5 gallons of wort in range 12-22 celsius with an external temperature of 10-25 celsius according season…8-10 degrees of delta worst case
Moreover I have a specific requirements to heat the wort during winter…and I can’t do this with just an air conditioner
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Old 03-28-2012, 03:49 PM   #25
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Quote:
Originally Posted by JKoravos View Post
I think it's a pretty cool project, nice work.

That being said, I fooled around with the idea of doing the same thing with Peltiers, but once I started playing around with them I realized how many I would need and the amount of power it would take to cool any significant amount of fermenting wort was going to be ridiculous. You've kind of found the same thing, I see. Getting the chamber down to 8C with a carboy full of water is a much easier task than keeping a vigorously fermenting beer at 18C.

As a comparison, my ferment chamber is about twice the size of yours and it is cooled with a 5,000BTU air conditioner. The chamber gets down below -15C within a few minutes when the AC is running.

Have fun with the project, I hope it works out for you, but I just don't think Peltiers are well suited for this task.
I've got a peltier based cooler very similar to the one being described here. I love it. It's not great at quickly dropping the temperature of large volumes of liquid, but for keeping fermenting beer at a steady temperature within 20ºF of ambient it has never let me down. I get precise control with a PID, very little noise, and a significantly smaller footprint than I would have with an equivalently compressor-based system. I don't mean to knock on your system, as I'm sure it works great for you. But, peltiers definitely can work and, for some, are far and away the best option.
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Old 03-28-2012, 07:32 PM   #26
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It's a better option if you need something quiet and unassuming. Fortunately I don't have that constraint.
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Old 03-29-2012, 04:44 AM   #27
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This is my first post, but not my first rodeo, not peltier project. That said, it is not finished yet. I thought I would let you all know my peltier based conical is silent and works like a dream and does not cost me that much to run. Anyway, I made a few different peltier projects, both are in progress, but I have brewing with them. I have attached some photos of my peltier cooled conical fermenter. It runs at about 146 watts and runs me about $50-100 a year a according to my "kill a watt." What do you all think? I would be happy to help others.
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Old 03-29-2012, 11:32 AM   #28
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Quote:
Originally Posted by Dentight View Post
This is my first post, but not my first rodeo, not peltier project. That said, it is not finished yet. I thought I would let you all know my peltier based conical is silent and works like a dream and does not cost me that much to run. Anyway, I made a few different peltier projects, both are in progress, but I have brewing with them. I have attached some photos of my peltier cooled conical fermenter. It runs at about 146 watts and runs me about $50-100 a year a according to my "kill a watt." What do you all think? I would be happy to help others.
Very cool, I'd be interested to hear more about how you accomplished this. Maybe you could do a small write up in a separate thread and link to it here?
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Old 03-29-2012, 01:28 PM   #29
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How often is it running to cost you that $50-100? That seems like an awful lot to me. My 13ft3 chest keezer only costs $25-$30/yr to run and that's going 24-7-365.
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Old 03-29-2012, 01:37 PM   #30
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I would be happy to do so. I think the most important thing when using the peltier is removing the heat from the system, and the best way of doing that is to use liquid not air. So I have a dual loop, one hot and one cold, system. Basicly I have sandwiched the peltier between two watter blocks. The cold loop consist of a pump, a reservoir, water block, and a copper coil that wraps around the fermentation chamber. The hot side replaces the copper coil with radiators and fans. The cheapest and most efficient that I have found happens to be large heater cores from cars. If people want I will start another thread, I don't want to "hijack" this one. I have just been working with these things for a bit and after a lot of trial and error I have learned how to make the peltier work pretty dam well, or so I think. The best thing is how silent it is, the only thing I can hear is my refrigerator running and this thing is almost completely silent.

I have a photo of the conical after I made a custom stand for it and before I put all of the stuff on it. I think this photo makes it easier to understand.


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