Posted by PolicySpy on April 6, 2010, 6:16 am
I don't really believe that hydrogen produced from water is
commerically viable...but wanted to think about hydrogen production.
But think about North Africa near the Mediterranean Sea. A solar
powerplant could make electricity but where would the demand for the
electricity be ? So the solar powerplant could take the electricity,
make hydrogen, and pump the hydrogen to the nearest port. At the port
hydrogen could be liquefied and loaded onto tankers for export.
Now a solar powerplant that uses mirrors to heat water for steam must
have a source of water. Well, the Mojave Desert has the Mojave River.
It's just a situation of a desert next to mountains and the river
flows out of the mountains. Obviously, the desert is only irrigated at
the river. Now I don't know if the solar powerplants in the Mojave
Desert get their water from the Mojave River or elsewhere but wanted
to explain water in the desert.
Posted by PolicySpy on April 6, 2010, 6:43 am
Well, I can take a quick look at web sources on hydrogen-from-water.
The energy efficiency of producing hydrogen from water with
electricity could be 50% to 80%. But that doesn't include the energy
lost in making the electricity. However, there is a High Temperature
Electrolysis that uses both steam and electricity and that would seem
to fit well with a solar mirror powerplant.
I suppose it would be a rare situation of some location that could
build a solar powerplant but not need the electricity.
Posted by PolicySpy on April 6, 2010, 6:55 am
I forgot to mention another point:
Hydrogen for fuel cells should come from electrolysis so as to have
the required purity.
Posted by Morris Dovey on April 6, 2010, 8:27 am
On 4/6/2010 1:16 AM, PolicySpy wrote:
[posting from alt.solar.thermal]
Ok, I took a moment to think about North Africa near the Med - I pulled
up a satellite view, and noticed that there are places where power
transmission lines to Europe would not be impossibly long.
I also noticed that, for North Africa, desalinization of sea water might
be an equally important use for some of that locally-produced thermal
energy - so perhaps there are other important end-products than just
...and it seems to me that discussion of use of North African resources
begs for North African viewpoints. :)
DeSoto, Iowa USA
Posted by Jean Marc on April 8, 2010, 10:00 am
You are not the first one to notice that: in fact the first such projects
were in the 1970's.
Several lines are again projected now, and I believe one (at least) has its
finance plan completed.
The solar plants would be located in the Morocco or Algeria desert, and the
electricity sent to Europe.
High efficiency concentration PV technologies or concentration thermal would
TREC (Trans-Mediterranean Revewable Energy Cooperation)