It will not work, your average refrigerator is not designed to cool that much heat (the water in the loop will be heated continously and thus the refrigerator will have to be running 100% of the time. If you have ever paid attention to your refrigerator, it's actually off more than it is on because it shuts off when the temps get "low enough," well it will not get low enough while a constant amount of heat is supplied to it. While a fridge uses up a fair amount of energy, one setup with one of these WC loops will put quite a BIG number on your electric bill. IMO this idea is totally useless, it's been attempted and it has failed almost all of the time. A peltier will give you better results, so would phase change. Peltiers are not THAT much of a pain, if you're willing to take a small refrigerator, start creating a waterloop in and out of it, and drill holes, I don't see why you couldn't just prep the motherboard/CPU against condensation, which isnt all that difficult.