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View Diary: Recent DOE Break-Through with Hydrogen Fuel Cells, should make them Affordable (275 comments)

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  •  Er... (1+ / 0-)
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    Quicklund

    Assuming that you're talking about natural gas conversion to hydrogen, you're quite right that heating up the water could be done by solar -- but only by solar heating, not solar electricity, and even then it would be a pre-heating process only. As soon as you bring solar PV into the picture, the prices go through the roof. There's reason to hope that the cost of solar PV will go down, but it's definitely not there yet.

    •  I've been working on a system (0+ / 0-)

      that uses the waste heat that would normally flow out the exhaust of a standard ICE to heat additional water vapor plus a small amount of new fuel before the heated gases are reformed in a catalytic reaction chamber just prior to intake. We call this pre-ignition catalytic conversion. Exhaust gases from a modern ICE are over 600 degrees and it does not take much additional external energy to reform all the gases down to smaller more reactive units.

      Water spits into H2 and O2 at 1200 degrees which is why we were taught not to use water on jet fuel fires in the Navy. The water becomes fuel when the temps are high enough. Why can't we apply the same principles to Solar, use solar energy to super heat the water vapor to as close as we can to 1200 degrees and use the electricity produced by the solar panels to complete the separation of H2 from O2 and compress the gases.

      Really don't mind if you sit this one out. My words but a whisper -- your deafness a SHOUT. I may make you feel but I can't make you think..Jethro Tull

      by RMForbes on Sun Apr 24, 2011 at 03:39:33 PM PDT

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