Interesting. The GP turns heat into electricity?
Cool... "Thermocouples are pairs of dissimilar metal wires joined at least at one end, which generate a net thermoelectric voltage between the the open pair according to the size of the temperature difference between the ends, the relative Seebeck coefficient of the wire pair and the uniformity of the wire-pair relative Seebeck coefficient."
from:
http://www.temperatures.com/tcs.html
http://www.electronics-cooling.com/Resources/EC_Articles/JAN97/jan97_01.htm
Well, how about that?