Re: Fuel Cell Efficiency in automotive applications

"John Savage" <rookswood@xxxxxxxxxxxxxxxx> wrote in message
news:061207000101230.07Dec06$rookswood@xxxxxxxxxxxxxxxx
Eeyore <rabbitsfriendsandrelations@xxxxxxxxxxx> writes:
Bob Eld wrote:

What really matters is miles per dollar, miles per fill-up and initial
costs. Hydrogen has a way to go before it is competative no matter what
the
efficiency is. Most of us feel that it will never get there.

I don't see how it ever can get there.

Hydrogen is merely an 'energy carrier' and batteries do that job many
many tines better.

True if the H2 is synthesised from methane or water. But, according to a
press release by a company producing hydrogen vehicles, the H2 component
in the natural gas piped to homes in many countries means that, in theory,
home owners with a H2 vehicle could run a device to extract the H2 from
their gas line and fill their vehicle's tank overnight.

My thoughts are that it might be more practical for the corner servo to
do this, rather than each domestic H2 vehicle owner.
--
John Savage (my news address is not valid for email)

Why take a perfectly good fuel like methane and make it into hydrogen? Home
owners with a methane powered vehicle can extract the methane from their gas
line and fill their vehicle's tank overnight ...and the tank can be smaller
for the same range and lower compression ...and methane vehicles cost a LOT
less than hydrogen powered vehicles ...and directly using the methane is
more energy efficient than reforming the methane to hydrogen and using the
hydrogen.

Don W.


.

Relevant Pages

  • Re: Propane and propane accessories
    ... easier / cheaper to liquify. ... What I know is that methane is extremely combustible - dangerous to ... Whatever happened to electric cars - solar cars - mass transit??? ... My town is full of CNG vehicles, ...
    (alt.gathering.rainbow)
  • Re: Propane and propane accessories
    ... easier / cheaper to liquify. ... What I know is that methane is extremely combustible - dangerous to ... cheaper, but not as easily accessable as I recall.... ... occupied by delivery vehicles. ...
    (alt.gathering.rainbow)
  • Re: Nothing like oil?
    ... The lights, the motors, the vehicles, all run by a high-powered gas ... And methane cometh from pig shit. ...
    (rec.arts.sf.written)
  • Re: manure->methane -> power
    ... >> systems can run 70-80% energy efficiency converting to electricity ... I wrote a report on methane digestion systems in college. ... South Africa, I believe it was, and perfected the continuous feed digester. ... push it into the underground tank. ...
    (misc.rural)
  • Re: Climate camp news.
    ... efficiency of the diesel cycle engine is 56%, ... suggest they could achieve up to 20% better efficiency than a pure diesel ... the real waste is in building things like wind ... for every four units of methane produced by domestic ruminants, ...
    (uk.legal)