Actually it can work fine in some flat areas. Anywhere there is mining,
higher sections of old excvations can be flooded and drained down to
lower excavations, then pumped back up later. I read an article on this
sometime back. Search for "pumped storage mines" and you'll get lots of
examples.
Peri
------ Original Message ------
From: "Martin WINLOW via EV" <ev@lists.evdl.org>
To: "Robert Bruninga" <bruni...@usna.edu>; "Electric Vehicle Discussion
List" <ev@lists.evdl.org>
Sent: 25-Jun-14 8:28:54 AM
Subject: Re: [EVDL] Hydrogen/EV thoughts
Surely there is a more efficient way of storing excess electric power
than this?! Even pumping water up into reservoirs and then dropping
again through turbines (like the UK national grid does in wales
http://www.fhc.co.uk/ffestiniog.htm ) must be more efficient? Wont work
very well in the Great Plains but most other places should have some
hilly bits. MW
On 25 Jun 2014, at 15:36, Robert Bruninga via EV wrote:
Generally, Hydrogen for transportation (no infrastructure) makes
little
sense compared to EV’s (everyone has an outlet in their garage). The
business model for hydrogen cars is very weak (though it is needed
for
trucks and road warriors).
BUT!
There is a future for hydrogen in utility scale applications for the
eventual Bazgigawatts of periodic solar and wind excess into
electrolysis
of water to hydrogen. Think of it as energy storage (the holy grail
of
renewables).
But then creating a HUGE infrastructure from zero to distribute this
hydrogen source in tiny little buckets to burn everywhere in tiny
amounts
in millions of cars makes no sense, when the utilities can far, far
more
easily burn it right there at their plants to provide a continuum of
electricity at night and/or low wind.
Another way to look at it is to have the utilities burn the excess
hydrogen
to make electricity and use the grid to distribute that electricity
to
EV’s. That is a far easier way to distribute “hydrogen stored energy”
since EV’s and the grid distribution already exist everywhere.
Of course, there will always be a market for SOME hydrogen fueled
cars and
trucks that must do long trips or continuous road travel. No
question.
But that is something like only 10% or our transportation energy… and
easy
to implement along the interstates…
P.S. There is another thing I just became aware of. Other countries
versus the US with respect to Energy Storage.. Not everything is
equal.
Germany has a different perspective on storage (hydrogen) for many
reasons… they have no natural gas like we do. They cannot use natural
gas plants to make-up solar/wind shortages. Where we view “storage”
as a
short-term (max 12 hour overnight) need, they view storage as a
long-term
requirement and not just for backup electricity, but for weeks or
months…
http://www.renewableenergyworld.com/rea/blog/post/2014/06/energy-storage-a-different-view-from-germany?cmpid=SolarNL-Tuesday-June24-2014
Just some thoughts.
Bob, WB4aPR
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