Have you ever heard about or tried Thermoelectric cooling?
The principal rests on "Peltier effect" [an effect whereby heat is given out or absorbed when an electric current passes across a junction between two materials.]
It can be achieved by an small plate called peltier plate. You give it an current and one side will cool down and the other will heat up.
This cooling is used in small cooling boxes and I even seen an actual cooling for CPU`s made on this principle.
I have no experiences with this kind of cooling but i think it`s worth the discussion or even "I must try it" section.
