Quote:
Originally Posted by ecofreak
Pry a peltier unit+heatsink combination from any electrically cooled cooler, and stick a fan in front of it for an easy A/C. The peltier unit uses no freon/yuck stuff, it functions by getting cold on one side and very hot on the other. If you heatsink the one side, it dissipates the heat, and thus has net cooling.
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Actually they have a net heating effect and are not very efficient. From an actual data sheet I got these values. To remove 28.3 Watts of heat from the cold side you need 52.7 Watts of electricity and need to dissipate 81 Watts of heat on the hot side with a temperature difference of 71 degrees C.