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Hydrogen House

 
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jabailo



Joined: 20 Mar 2006
Posts: 1273
Location: Kent (East Hill), WA

PostPosted: Thu Aug 11, 2011 8:04 am    Post subject: Hydrogen House Reply with quote

A hybrid solar panel to make hydrogen

Quote:

Engineer Nico Hotz earlier this week detailed results from his research around a rooftop solar panel that generates hydrogen from the sun's heat. The hydrogen gas--which is made by breaking off hydrogen atoms from a water solution--can be stored and used to make electricity in a fuel cell.

In his experiment, Hotz determined that his system creates more useable energy than solar photovoltaic panels which convert sunlight directly into electricity. He calculated the cost could be lower, too.


http://news.cnet.com/8301-11128_3-20091185-54/a-hybrid-solar-panel-to-make-hydrogen/#ixzz1UjkRkwR1



Hybrid solar system makes rooftop hydrogen

Quote:

Instead of systems based on standard solar panels, Duke engineer Nico Hotz proposes a hybrid option in which sunlight heats a combination of water and methanol in a maze of glass tubes on a rooftop. After two catalytic reactions, the system produces hydrogen much more efficiently than current technology without significant impurities. The resulting hydrogen can be stored and used on demand in fuel cells.

For his analysis, Hotz compared the hybrid system to three different technologies in terms of their exergetic performance. Exergy is a way of describing how much of a given quantity of energy can theoretically be converted to useful work.

"The hybrid system achieved exergetic efficiencies of 28.5 percent in the summer and 18.5 percent in the winter, compared to 5 to 15 percent for the conventional systems in the summer, and 2.5 to 5 percent in the winter," said Hotz, assistant professor of mechanical engineering and materials science at Duke's Pratt School of Engineering.


http://www.eurekalert.org/pub_releases/2011-08/du-hss080911.php
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