peltier based keezer

[diegolaz]

Hello, wanted to know if anyone has seen a peltier based keezer.... my idea is to make a custom box to fit 1 or 2 "5 gallons" KEGs with the gas tank, with isolation and everything.
I've seen some peltier options with batery for 2 cans o a little bigger, but I was wandering if its enough (using 2 to 4) conected to AC (with an adapter to 12v) or is it just too inefficient and thats why you don't see any in youtube or google.... ?

Thanks!

 

[diegolaz]

Here is a nice project although maybe a little complicated for me to get the parts (in Argentina).... but similar to what I was thinking
https://www.youtube.com/watch?v=yXSQqGCRMKA

 

[pjlenn]

This is an interesting project.  Are you thinking about pairing it with an air conditioner to get colder ambient and so colder output from the Peltier unit?  I built a fermentation chamber using a window air conditioner and was disappointed with the results as I could only get the temperature down to about 15 degrees C.

Paul L.

 

[quartcentury]

This is an interesting project. Are you thinking about pairing it with an air conditioner to get colder ambient and so colder output from the Peltier unit? I built a fermentation chamber using a window air conditioner and was disappointed with the results as I could only get the temperature down to about 15 degrees C.
geometry dash
Paul L.

a pretty cool idea. But how to pair it with an air conditioner to get colder ambient?

 

[GigaFemto]

I use a Peltier-based fermentation cooler. It works very well and can even do lagers and a cold crash to 1 C for a 5-gallon batch. Good insulation is the key! With perfect insulation the cooler doesn't have much to do once the cold temperature is reached. To get 2 kegs and a CO2 tank cold would take a long time, though, unless you use several TEC chips in parallel. I only use one TEC1-12710 module and a 20 A DC power supply. I use an Arduino and a motor driver H-bridge module (https://www.pololu.com/product/1451) to drive the DC current into the TEC modules. It can handle 40 A (with a heat sink and fan on it) so it could drive multiple TEC modules in parallel. This project is definitely viable if you have the technical knowledge and construction skills to make a really well-insulated container. Not just thick insulation on the walls but lots of attention to the corners and edges and eliminating all gaps.

--GF

Just looked at the H-bridge specs and they have downgraded them to 12 A continuous and 30A peak. You would need one for each TEC1-12710.