Physical Insights

An independent scientist’s observations on society, technology, energy, science and the environment. “Modern science has been a voyage into the unknown, with a lesson in humility waiting at every stop. Many passengers would rather have stayed home.” – Carl Sagan

Anti-nuclear quote of the day…

with 2 comments

http://www.theoildrum.com/node/3877#comment-334713

With concentrated solar, high temperature electrolysis of hydrogen is more than 100% efficient. Nuclear reactors for making hydrogen have temperature limitations.

Emphasis is mine. I’m sure there have to be a few TOD readers who aren’t going to let that stand unchallenged.

Written by Luke Weston

April 25, 2008 at 7:54 am

2 Responses

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  1. Heh, I think that those idiots over at The Oil Drum are actually getting dumber.

    bryfry

    April 25, 2008 at 10:28 am

  2. Actually, it is not COMPLETELY wrong. The poster just does not know what he is talking about. High temperature electrolysis is endothermic. At high temperatures the electrical energy required to break the H-O bonds is less than the resulting H2 energy content (lower heating value). So yes, from a purely electrical energy standpoint, there’s more energy in the H2 than supplied electrically to the electrolyzer. But that is just as stupid as claiming that nuclear driven Sulfur-Iodine cycle H2 production would be infinitely efficient because no electrical input is required. Only thermal.

    Klaus A

    April 25, 2008 at 6:04 pm


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