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Solar Energy and Hydrogen - Page 7

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Posted by dlzc on April 7, 2010, 9:35 pm
 
Dear daestrom:


Not saying you are wrong, but you could take it fully laminar, or take
it very large diameter, and change that "equation".  It is cost
savings at some point.

Far superior would be direct electrical transmission (or even
microwave), without a doubt.

But making hydrogen first, and pumping that, is a lose-lose
proposition.

David A. Smith

PS:  Thank heavens for some real engineering content on
sci.engr.mech... Been nothing but spam for months.

Posted by daestrom on April 9, 2010, 2:09 pm
 
dlzc wrote:

Going to larger pipe for laminar raises the initial costs by more than a
100 times.  Who wants to pay the interest on that debt?

daestrom

Posted by Mauried on April 7, 2010, 10:22 pm
 wrote:


Isnt it simpler to just keep the electricity as electricity and shift
it to where you need it via HVDC transmission lines.
Converting electriciy into hydrogen and then transporting the hydrogen
, then having to convert the hydrogen back into electricity has to
many losses.


Posted by Josepi on April 8, 2010, 2:03 am
 We have been told about 3% exergy for hydrogen.


Isnt it simpler to just keep the electricity as electricity and shift
it to where you need it via HVDC transmission lines.
Converting electriciy into hydrogen and then transporting the hydrogen
, then having to convert the hydrogen back into electricity has to
many losses.




Posted by PolicySpy on April 6, 2010, 7:11 pm
 Okay, let's build the complete system:

By international agreement, governments around the world contract to
buy designated amounts of high-purity hydrogen produced by solar
mirror powerplants.

The solar mirror powerplants for the production of high-purity
hydrogen are built around the world in locations where solar mirror
powerplants are effective and where port export is possible.

Fuel-cell fueling locations are put in place by governments near ports
and along populated coastlines. Hydrogen delivery is from the port and
by truck.

The car manufacturers seeing fuel-cell fueling locations in populated
areas, begin making fuel-cell vehicles.

As lines back-up at the hydrogen fueling locations then private
industry begins adding hydrogen fueling locations and pipelines.

But what is the advantage of fuel-cell vehicles over electric
vehicles ?

Well, fuel-cell vehicles have quicker fueling, less weight, and a
lower cost of battery replacement.

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