[Gasification] Hydrogen Engine

[jim mason]

On 1/25/07, jim mason <jimmason at whatiamupto.com> wrote:
> > "adjust the ball valve until the air mixture is correct (which i would guess is about 1:10.)"
>
>
> minor correction.  the above typo in the proposed ball valve and auto
> brake vacuum assist unit for a hydrogen carburetor, claimed likely
> hydrogen to air mixture was 1:10, as seen below.  oh, if only it were
> true, we'd be off to the races on producer gas!
>
> the intended typing of my guess was "1:1".
>

actually, i correct myself again.  it is likely 1:2.  producer gas is
about 1:1, and that is about with 50% nitrogen in it.  the H2 is
presumably N2 less.  and given H2 has about the same energy density as
CO, its ratio should relate directly to producer gas.

and yes, you could likely also just run this as an open throttle
diesel type carburation.  all air all the time.  vary h2 as power is
needed.  such could also be done with the ball valve, car brake
assist, and regulator set up i proposed.

so many interesting things to do with heat engines.  so little time . . .

j






>
>
>
>
> On 1/25/07, jim mason <jimmason at whatiamupto.com> wrote:
> > On 1/25/07, Jeff Davis <jeff0124 at velocity.net> wrote:
> > > Dear List,
> > >
> > > See link below:
> > >
> > > http://www.knowledgepublications.com/announce/01252007.htm
> > >
> > >
> > > Jeff
> > >
> >
> >
> > this seems a bit silly.  even if you can get the hydrogen bottle.
> >
> > all they are likely selling here is a crappy generac type briggs and
> > straten based gas genset that runs at 3600rpm.  $500 at any home
> > depot.
> >
> > to which they are adding a high pressure regulator to a propane or
> > natgas type diaphram fuel valve.  admitedly, this is not on every
> > shelf, but that doesn't justify the $2.4k price tag.  in fact, you
> > could make one with a regulator, ball valve and an automotive vacuum
> > brake assist unit, with the "brake" rod attached to a ball valve
> > handle.
> >
> > use the regulator to reduce pressure to about 5psi or so, which is
> > then valved with a ball valve.  use the vacuum assist to control the
> > ball valve that delivers more gas on engine vacuum demand.   note that
> > the vacuum you would be "sourcing" is BEFORE the carburetor.  not the
> > regular vacuum pickup point between the intake and the carb.  that
> > vacuum is not relevant to mixture in our proposed set up.
> >
> > with such a set up, you could continue to use the existing carburetor
> > as the throttle.  leave it hooked up to the already existing rpm
> > regulating flywheel governor in the engine.  no need to add another
> > complicated external unit.
> >
> > now you just have to keep the mixture correct.  which means making the
> > air intake have the some resistance to flow so the vacuum controlled
> > ball valve will open.  such could be easily done with another ball
> > valve on the air intake.  close it down until the vacuum opens the
> > hydrogen ball valve until the hydrogen:air mixture is correct (which i
> > would guess is about 1:10.  hydrogen is very low energy density, which
> > is why they are selling this as a 2kw genset.  i think they are
> > starting with the usual 5kw gas ones.
> >
> > oddly, i somewhat made this last weekend.  i have yet to post it, but
> > i ran my V2.O stratified downdraft gas rig into a junk 5kw genset like
> > this, using a carburetor set up like described above.
> >
> > here's some pix here:  http://whatiamupto.com/Gasification/firstfiring.htm
> >
> > this carburetor set up is somewhat related to the MEN dual fuel
> > carb/gas set up.  but it doesn't go to the effort to add another
> > butterfly plate/valve.  it just uses the existing one in the existing
> > carburetor.  which means that my gas carburetor, set up for a vacuum
> > pulled gasifier, only required the addition of one ball valve to work.
> >  pretty fancy, huh? . . . ;-)
> >
> > furthermore, it works as a dual fuel unit.  you start the generator on
> > gasoline.  when it is warm, and your gasifier is warm (either by
> > partial sucking through the engine, or prefanning it, which i suggest
> > the later), you shut off the fuel cock on the gen tank, and adjust the
> > air restricting ball valve quickly so that you get proper mixture of
> > woodgas and air.  i found it easier to partially close the choke
> > during this transition, as the transition can get a little rough until
> > you figure out the ball valve settings.  but otherwise, it worked
> > great.
> >
> > j
> >
> >
> >
> >
> >
> > > --
> > > Jeff Davis
> > >
> > > Some where 20 miles south of Lake Erie, USA
> > >
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> > >
> >
>