[Gasification] Hydrogen Engine

[jim mason]

> "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".

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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> >
>