"Just like the engine that runs on pure water I guess."

no this is thermodinamically sound, it has high eficiency but underunity

in fact i trust my techers ill ask some about this i bet they didnt know about it either

"You dont think it may be more efficient to use solar electricity directly? "

the inventor of it called it solar wheel ;)

"You still need a super expensive plant for the process and the produced water will be too expensive for the people"

thats true hope supresed designs into desalinization come to light


"It's a free patent, if it did work they would be all over the planet - it produces a something you can sell. "

you dont understand yet this is not overunity but an odd thermodinamic engine

if you want its its eficiency what could be discussed

althought its neither the eficiency what makes it great

its the simiplicity to build it in natuaral cooperatives and the extreamly low temp gradient it needs

man it works so undiscusibly even mythbusters admitted it work

http://www.youtube.com/watch?v=NHG9_d6J2Jc

but they work for them comapre it with this:

http://www.youtube.com/watch?v=-fUlKBH1sY8

or this

http://www.youtube.com/watch?v=Za9td23Vk0c