Post Rad Chiller Concept

[Uncle Jimbo]

very nice points.. in a distant future I will try to do the same ( no money ATM)

I will be using about 20 x 40w undervolted and air cooled..I am still looking for a big and effective HS for the hot side..would love to run it fanless if possible. the only thing that is going to be a real killer is a decent psu

@uncle jimbo: you could have said 1 calorie instead of 4.18 joule :P.. make it simple for us :P.. nice info

Not trying to be arcane - you have to put the 4.18 in somewhere to get to watts... too bad, it's handy to have 1 cal = 1 degree.

BTW you might do better to use bigger pelts even if you want to undervolt - they are really just more elements per package anyway. Per my previous post, the best efficiency is with the hot side hot - draws less amps to get to the same point on the curve. If you put 2 of the TECs I was discussing in series across 12V, you will probably get about 11A draw and move about 35W per unit. That gets to 1.9W in per watt moved, which is about as good as it gets for TECs. I have never tried running a unit that low and the curves don't go down there, so it is something you would need to test. BTW just work around 12V as a design center and you'll find cheap PSUs that can do the job. Also a smaller number of bigger TECs makes finding heat sinks easier. With only 100W or so per unit, you could go fanless with a standard CPU sink I think.