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Re: [PSUBS-MAILIST] Hydrogen Fuel Cells coming closer for Psubs?
I don't think so.. if you increase the amount of oxygen in the fuelcell
storage bottle to the amount you need for breathing and for the
fuelcell. Means you have more oxygen in the storage bottles than is
equal to the hydrogen support.. fuel cell stops automaticly using
oxygen - if the hydrogen bottles are empty.
Another point.. fuel cell needs the gases under a low pressure of about
2 bars/atmospheres - so in a 1atm boat you can use/calculate at least
one atmosphere left in the bottle for emergency breathing..
50 Liter x 1 bar = 50 Liter divided by using 0,25 Liter an Minute
for breathing = 200 minutes or about 3 hours additional emergency
breathing for one person - just from one empty fuel-oxygen-bottle..
Carsten
Ian Roxborough schrieb:
>
> On Thu, 5 Dec 2002 17:26:23 -0400
> "Herve" <caribsub@coqui.net> wrote:
>
> > What would be the source of Oxygen for a fuel cell onboard a PSUB?
>
> Similar the the Oxygen source for the pilot, a high pressure O2 bottle.
> Although, I would imagine that you'd want to keep the life support
> O2 seperate from the Fuel Cell O2. It would atleast keep life support
> time estimates accurate.
>
> Ian.
>
> > Herve
> >
> >
> > ----- Original Message -----
> > From: "David Buchner" <buchner@wcta.net>
> > To: <personal_submersibles@psubs.org>
> > Sent: Thursday, December 05, 2002 4:29 PM
> > Subject: Re: [PSUBS-MAILIST] Hydrogen Fuel Cells coming closer for Psubs?
> >
> >
> > >
> > > On Thursday, Dec 5, 2002, at 13:33 US/Central, Ian Roxborough wrote:
> > >
> > > >
> > > > Coleman Powermate/Ballard seem to have finally have
> > > > there hydrogen fuel cell generator on sale:
> > > >
> > > > http://www.airgen.com/airgen.shtml
> > > >
> > > > It seems like it will generate 1000 Watts continuously for
> > > > either 4 or 11 hours (depending on whether you have the big
> > > > hydrogen cylinder or the little one).
> > > >
> > > > The cost is $6000 and I didn't seen the refueling cost
> > > > anywhere either. The dimensions are 27.3" x 15.8" x 19"
> > > > which is reasonable for a small sub.
> > >
> > >
> > > Coooool! Can't you get hydrogen cylinders from places that do welding
> > > gases? Maybe I imagined that. But it does have to be straight-up
> > > hydrogen, not methane or propane (or acetylene?) or other more popular
> > > and available fuel, like some ideas I'd heard of. Hm. Like
> > > hydrogen-fuelcell cars, that becomes a "they don't sell that around
> > > here" type of problem.
> > >
> > >
> > >
> > >
> > > David
> > > buchner@wcta.net
> > > Osage, MN, USA
> > > http://customer.wcta.net/buchner
> > >
> > >
> > >
> >