Seebeck effect

Generate electricity with temperature difference by em-TECH in MA. http://www.practicalsolar.com/technology.html#Practical_Solar_heliostats_with_concentrator_cell_technology_(advanced_PV)


 * http://www.termo-gen.com/pages/generators.html Commercial unit 300watt electric power


 * See http://scratchpad.wikia.com/wiki/Wims_parabolic_trough