Hi Robert and All,
--- robert luis rabello <[EMAIL PROTECTED]> wrote:
>
>
> steve spence wrote:
>
> > the point is, if you generate 1kw from solar,
> shouldn't you store 80% in a
> > battery (ev) instead of 30% in a hydrogen tank
> (fuel cell ev)?
> >
>
> An excellent question. In terms of energy
> density, lead acid batteries are
> perfectly adequate for the short trips most people
> make during the work day.
> Extended range, however, requires more battery mass,
> and this is where H2,
> particularly in hydride form, shines over current
> battery technology.
Batteries are quite capable of extended range. A
dedicated EV can get 100+ mile range on lead batts.
I'm building an EV that gets 150 mile range with them.
Or ni-cads the range goes to 200 miles+ and with
Lithium it goes to 300 miles.
Solectra built a composite EV 4 pass sadan that
gets 225+ miles on NiMH batts on a run from Boston to
NY at freeway speeds with power left over.
Lead batts can be charged 80% in 20 minutes and
ni-cads can be charged 100% in 30 minutes.
Or an APU of 6hp/ 1,000# gets you unlimited range
at 100 mpg.
All at 50% of the energy use of a fuel( fool) cell
system.
As for power/ weight ratio compared to fuel cells
ni-cads or lithium beats hydrogen storage.
>
> Further, some of us live in cold climates, and
> batteries deliver
> significantly less energy when they're cold. In
Neither ni-cads or lithium batts have a problem
with cold and a little insulation solves the problems
of lead batts.
> some places on earth, the
> abundance of hydro electricity, or the possibility
> of solar thermal processes
> make hydrogen production feasible. (It may soon be
> cheaper in British Columbia
> to split water with grid power and burn the H2 in an
> engine than to burn
> gasoline, and a gaseous fuel conversion remains
> significantly more affordable
> than converting to electric.
Done right the EV will cost less when in full
production than an ICE.
Do you really think that a gaseous H2 conversion
cost less than a electric conversion. Storing H2 is
not cheap.
> It could be done in
> the southwestern U.S. with
> concentrated dish or trough systems, as the American
> Hydrogen Association
> advocates.)
Or go twice as far with an EV on the same energy.
>
> In practical terms, however, I have to agree
> with you. EVs make better
> economic and thermodynamic sense than H2 with fuel
> cells or internal combustion
> engines in most places. I think a lot of the
> discussion concerning fuel cell
> usage in automobiles consists of little more than
> green wash. If we really
> wanted to be environmentally friendly, we'd walk, or
> ride a bike!
I agree except Ev's always make sense especially
when RE electricity is used to charge them and a small
APU is use for the few times you would need more than
100 mile range..
I do ride an E-bike.
jerry dycus
>
> robert luis rabello
>
>
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