Originally Posted by zipdogso
Just bear in mind fixing the TECs to the outside of your container is not going to be as efficient as my suggestion. My suggestion was a straight air chiller and 3 TECs would of been a pretty big overkill. Your limited to 3 TECs with the PSU. and your relying on exchange of cold from the case wall to air with no air agitation.
I have just noticed you are constructing the metal case yourself...is it so much of a problem then to make the cutout for the TECs as I suggested ?
If it heatsinks your worried about ebay UK seller techxs has some cheap ones, really cheap unfortunatly I cant give you the link right now he appears to of taken his shop off while he updates it.
Still if you insist doing it your way put the TECs at the top you may somehow set up a slight convection circulation (cold air falls, hot air rises.) especially if you support your drinks off the floor perhaps with a bit of wire mesh.
I don't have the blades to cut within the metal unfortunately, I just have a few metal cutting disks for the outside. If I could make a cutout, and I could get a heatsink that would do the job for the inside (I'll take a look at that shop once it's up and running again
), there would still be the problem of having a fan for the circulation that's protected from its environment (moisture, splashes, knocks, and such). I'll take a look online and see what sort of things are available though, you never know! But as flak-spammer suggested, even without a fan, a heatsink on its own would be better than nothing at all.
Originally Posted by postama
Have you thought of putting the TEC's on the outside of a reservoir to get that water cold (hopefully not freezing, although I know that can be a problem) then using the water to circulate and cool your container. Seems with the low conductivity of air, that it won't cool very quickly inside unless you have a large surface area of something cold (such as water in copper pipes) to cool it.
I am not an expert on this by any means, just an interested geek.
That would probably be a much more efficient method (according to common sense, anyway!), but it's outside of my ability both in terms of technical expertise, available equipment and funds Edited by Obinice - 3/19/10 at 7:18am