Hybrid Car – More Fun with Less Gas

A Global Solar/Hydrogen Fuel-Cell System - Page 3

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Posted by Erdeemal on April 10, 2010, 11:57 am
 
KBH wrote :

Absurdł ! You would lose 4/5 of the energy produced ...

Posted by J. Clarke on April 10, 2010, 3:14 pm
 
On 4/10/2010 7:57 AM, Erdeemal wrote:

What of it?  You lose about that much with gasoline.

No, his problem is with "the Demand". That sound you hear is the
combined governments of the world rolling on the floor laughing.


Posted by Josepi on April 10, 2010, 8:54 pm
 More like 3% exergy from the figures I have read. That would be 32/33 of the
energy.


KBH wrote :

Absurdł ! You would lose 4/5 of the energy produced ...



Posted by KBH on April 10, 2010, 8:11 pm
 Yeah, If the governments will put the demand in place then the economy-
of-scale can exist and efficiencies can develop. The governments would
only buy solar-hydrogen, they would then put fueling stations in place
within 50 miles of major ports, but any excess fuel is their's to use
in any other way. (And that other use of solar-hydrogen could be to
add hydrogen to natural-gas pipelines at 1 part hydrogen to 10 parts
natural-gas.)

Now If the electrolysis is near the hydrogen distribution and the
solar powerplant is just going to send solar-electricity to the
electrolysis, that would be a situation where there would be
fundamental demand for the electricity itself and the electrolysis
would be dropped. The only way that solar-electricity is going to be
used for electrolysis is if it is at a place on earth where the solar-
electricity can't reach a highly developed area.

I mentioned northern Africa as a location where solar powerplants
might produce hydrogen by electrolysis. And that was just a quick
pick. So the key to this system is to develop hydrogen tankers. Of
course a container ship could just carry hydrogen truck trailers that
have compressed hydrogen in them.

How about Baja Mexico for solar-electrolysis plants ? Pipeline or
tanker ?

And many people question the energy conversion efficiencies. But see
the fuel-cell vehicle has less weight and 2.5 times the range of a
plug-in electric-vehicle. So there's a gain in efficiency at the end
user that we have no measure of. Then someone might say that the
hydrogen fuel costs more than the electricity but when battery
replacement cost is added to electricity cost the plug-in electric-
vehicle gets very expensive.

Posted by KBH on April 10, 2010, 8:21 pm
 
Also, hydrogen and oxygen will have new values. And those values will
be based on what values remote regions need for their expenses and
plant depreciation. The electrolysis is not using electricity as it is
priced in a highly developed area but is using electricity as the
value it has in a remote region with little demand.

Finally, the remote regions must ship the hydrogen by ocean tanker.

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