Hello, Jeff!
There are two logical "formulations" that, when both used, gives a
practical working solution for an "independent" motor starting from a
common gas-line.
A common gasifier delivery line usually (in a good system) keeps below
50 cm H2O.
A motor with tight valves, without overlap and hidden crankcase
ventilation into the manifold develops ~ 500 cm H2O at cranking.
Combined with the fact:
Identical pressure drops over identical openings (slots) results in
IDENTICAL FLOWS. (with similar fluids)
Using identical ganged twin flaps with identical geometry for gas and
air will deliver a 50/50 air/gas mix, if starting both from
atmospherical pressure.
The secondary air intake pressure has to be regulated to equal the
momentary gas-line
pressure with a membrane and air-line flap, sensing the resulting
air-pressure versus the gas-line pressure.
This way the total pressure drops in both "legs" will constantly be
equal.
To furthermore assist slow crank starting, the twin-flaps will be closed
by a trimmable spring closing the flaps COMPLETELY.
A manifold-vacuum membrane or cylinder, diameter ~2-3" opens the
twin-flaps
when the spring starts to give in for a vacuum of ~100 - 200 cm H2O.
This opening increases as the motor fires, and has to be controlled by a
manually settable stopper = idle limiter!
When fired, there has to be a "change over" to automatic run...
Max Gasman
------ Originalmeddelande ------
Från: "Jeff Davis" <[email protected]>
Till: "Discussion of biomass pyrolysis and gasification"
<[email protected]>
Skickat: 30.3.2015 03:47:47
Ämne: [Gasification] Two Engines One Gasifier
Dear List,
Is it practical to fuel two engines with one gas producer? I think a
check valve in each fuel line would be needed but would it be a problem
to get the second engine running? My system would consist of a charcoal
gas producer with two 6.5hp engines.
Thanks,
Jeff
______________________________________________
"Once an owner has got used to charcoal gas he will never revert to the
more expensive fuels", Geo Bray
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