I read an article a while back in (homebrew I think) someone built a homemade fuel cell using hydrogen from a homemade electrolyzer to power his cabin.
There has been a new development with heat potential and I wonder if we could do something similiar for a homemade version.
Inventor creates a 60 percent efficient SOLID STATE heat extractor.
The thing is it is basically 'sealed' hydrogen with a couple phase change materials, a hot and cold like a stirling engine, with hi-temp membranes to 'push' the gas thru, (like a fuel cell) kind of a new way of generating power. And with all those cheap solar concentrators we homemake, it's got me thinking...
http://peswiki.com/index.php/Directory:Johnson_Electro_Mechanical_Systems
http://www.ecogeek.org/content/view/1265/1/
http://www.popularmechanics.com/science/earth/4243793.html
Hydrogen posts only allowed if the poster has done something. Ask DanB if confused.