I think the bar fridge is a good base for making a quiet computer.
If you want to cool the air inside the bar fridge, cant you just make a water loop that connects to the standard cooling of the bar fridge? Just take away the compressor and just leave the tubes that go inside the case (the ones that originally cools the inside of the fridge). You will need two waterloops with this configuration, one that cools cpu, gpu, nb and the pelt, and one that just moves across the cold side of the 350 pelt through the original cooling tubes of the case, through a pump and back.
If you dont want or cant use the original fridge cooling tubes you can allways use a rad with a fan. That way the radiator will cool the air pretty efficiently. Ofcourse you CAN run the cooling radiator passively inside the case, but then condensation will build up.
I really dont know how much condensation can build up on a sub ambient cooled rad when the case is enclosed air tight. It all depends on the humidity and volume of the fridge, but even at 100% humidity 30 litres of air wont make alot of water i think. And if condensation is a problem you can allways put in silica gel or whatever inside the case that draws the moisture out of the air. That way you will never get condensation what so ever cause there is simply no water in the air that can condensate.
You will have to get a really big rad outside the case that can handle the generated heat, but that isnt a really big problem i guess (just get a big car rad and place it outside your window or something ghettoish
)
Interesting project, it redefines the meaning of a really quiet computer.
