CAFE Electric Aircraft Symposium Set For May 1

Skywise wrote:
wrote in :

The efficiency numbers look to me to be back of an envelope correct.

And that's all I guarantee them for!

I was about to do some more calculations to try to answer your
questions, and in the process of searching for numbers I found
the following Wikipedia article.

http://en.wikipedia.org/wiki/Hydrogen_economy

At a glance this article seems to cover a lot of the issues
being discussed. I for one would like to read it before trying
to answer. It might be worth other's to read as well.

Brian

After reading that article, I have come to the conclusion that hydrogen
as fuel will become a general economic reality only if at least one of two
things happen:

The world runs out of petroleum, natural gas, and coal and there is no
other choice.

There is huge advancement in electricity production, such as cheap
fusion.

http://en.wikipedia.org/wiki/Hydrogen_economy#Costs


--
Jim Pennino

wrote in :

After reading that article, I have come to the conclusion that hydrogen
as fuel will become a general economic reality only if at least one of two
things happen:

The world runs out of petroleum, natural gas, and coal and there is no
other choice.

There is huge advancement in electricity production, such as cheap
fusion.

http://en.wikipedia.org/wiki/Hydrogen_economy#Costs

I haven't finished the article, but that's also been my general
opinion.

Your item number one has a second ramification. Fossil fuels are
currently the primary mineral source for hydrogen production. So
running out of fossil fuel means switching to hydrogen requires
switching hydrogen production methods. Of course, there's plenty
of sea water, but that leads to your number two.

I think item two is required no matter what we do. Either we use
the electricity directly, or use it to power the production of
things like hydrogen as an energy storage medium. Remember, hydrogen
is not an energy SOURCE, because it has to be manufactured. Fossil
fuel is an energy source because all we have to do is extract it
and do a little refining. It already exists in tangible form.

Brian
--
http://www.earthwaves.org/forum/index.php - Earth Sciences discussion
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism
Sed quis custodiet ipsos Custodes?