Hope they work backwards, put heat in get current out, like a Peltier junction.......
"hope they work backwards.."
That is a possibility. See the Seebeck Effect, discovered originally in 1821:
http://en.wikipedia.org/wiki/Peltier_effect
I have a cooler that already has this.
Plug the junction plugs in 'dis' way and get heat.
Plug them in 'dat' way and get cooling. (reverse polarity)
Pretty cool for a car cooler.