Donor vehicle help and compressed woodgas

[KristijanL (Kristijan Leitinger)]

Ha, youre right! But whats the depth of char bed above the port?

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

Not enough I suppose, but the bottom door could be made taller with a slice of a tube.

[KristijanL (Kristijan Leitinger)]

It just occured to me! Perhaps it wuld be a good idea to fit a nozzle directly under the restriction. So, in times of constipation danger, like the long idle/slow drive scenario, the char under the nozzle can burn and form a cavity under the restriction, making the constipation fines from the restriction fall down and fill with fresh char. In the mean time, produce quality composition chargas for a solid idle.

[taitgarry00 (Garry Tait)]

I’m expecting Max will jump in soon with a history lesson from the 20’s or 30’s…

[KristijanL (Kristijan Leitinger)]

“Nothing new under the sun!”

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

Haha, you beat me to it by seconds

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

@KristijanL

the char under the nozzle can burn and form a cavity under the restriction, making the constipation fines from the restriction fall down and fill with fresh char.

This I understand, but would it benefit power at high demand, when we’re most likely already pulling through?

[taitgarry00 (Garry Tait)]

I think so, more oxygen reacting faster with more fuel, more flow through.

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

Hm…and steam added from above. Win-win

[taitgarry00 (Garry Tait)]

Supposing that the top pyrolysis area is increased simultaneously…

[taitgarry00 (Garry Tait)]

I do expect it’s not a new concept, but it does seem to have potential, if even in a limited way.

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

Remember Steven Abadessa’s center lower nozzle? Only it was above restriction.

[taitgarry00 (Garry Tait)]

I missed that, (or forgot), so many threads…

[KristijanL (Kristijan Leitinger)]

Well if l decide to go back to wood power on the Mercedes the gasifier will be restricted to low power, and my hilly rides will be driven hybrid. But if this alows me to gain better idle/takeoff (always a problem) lll trade gladly.

[JO_Olsson (Jan-Ola Olsson (SWEDEN))]

@KristijanL

But if this alows me to gain better idle

I’ve given this some thought. Could it be your dry filters have been somewhat restrictive offsetting the mix? I notice whenever my hayfilter inlet gets submerged (bubbler) I’m more likely to stall at idle. I empty the hayfilter and able to idle 400 rpm. I remember @don_mannes idling 300 rpm with his WK Tracker.

[SteveUnruh]

Hi guys.
As I will remind. I promote a center post supported sifter action grate system. learned this first from the GEK II & III systems. Then VesaM book. Then the sifter action from BenP’s Victory hearth systems.
Well a lot of these center post grate supports are hollow pipe.
So a lot of fellows have experimented around with up-from-bottom through this grate pipe introduceing many different gaseous adds, at different times, for different results.
Not my experiences, so I cannot report results other than edge introduction leads to problems versus a center out distribution.
Ha! My wood-base low carbon fuel I have never had the unused up char to explore these possibilities myself.
Regards
S.U.

[trigaux (Trigaux Thierry)]

@KristijanL

Anyway my idea is basicly wery simple and straingt forward. Step one is pressurise the gas just minimaly to overcome the drag of the system. This culd be done in many ways, perhaps best wuld be a belt driven centrifugal fan. The power demand shuld be low too sence we are only pushing the gas instead of actualy compressing it. Then, step two is to install a membrane vacuum automixer on, but inverted! Usualy gas comes at the engine at a vacuum and the automixer equalizes the pressure of air with restricting the air. This is the opposite. Air is drawn in the engine at atmospheric presure and the automixer restricts the pressurised gas to equalize. This wuld alow for greater cyl filling ratio and a much better throtle responce while not realy adding a ton of complexity

on all our vehicles, we already have a centrifugal fan (that of the engine radiator). Could the hot air of the engine space be used for this purpose?

The fan is powerful (a lot of cfm). The fan works anyway (little extra energy consume). The air is preheated by the engine …
Am I in the field?

Thierry

[KristijanL (Kristijan Leitinger)]

I dubt. The felt sack is remarkably breathable. Trying to blow trugh it feels no resistance what so ever. Plus, back when l had a wood gasifier on the MB l only used 2 small wet cyclones as filtration, they expelled sooty fog from the gas. Allso, l had no problem with idle/takeoff with chargas and sack filter combo. Its just the wood gasifier that caused me problems on both MB and Chevy

Thierry, l am not quite folowing. You mean you wuld push the air in the gasifier?

[trigaux (Trigaux Thierry)]

@KristijanL

Thierry, l am not quite folowing. You mean you wuld push the air in the gasifier?

Hi Kristijan

I read my last message, it is not very clear

if the engine space was hermetic (or partially airtight). I think that a slight pressure of hot air can be built in the engine space. A pipeline between the engine space and the air intake of a gasifier may be installed

emphibious vehicles have this seal

can I be delirious?

Thierry

[r_wesseling (Rindert Wesseling (Louisville,CO))]

@KristijanL

Anyway my idea is basicly wery simple and straingt forward. Step one is pressurise the gas just minimaly to overcome the drag of the system. This culd be done in many ways, perhaps best wuld be a belt driven centrifugal fan. The power demand shuld be low too sence we are only pushing the gas instead of actualy compressing it. Then, step two is to install a membrane vacuum automixer on, but inverted! Usualy gas comes at the engine at a vacuum and the automixer equalizes the pressure of air with restricting the air. This is the opposite. Air is drawn in the engine at atmospheric presure and the automixer restricts the pressurised gas to equalize. This wuld alow for greater cyl filling ratio and a much better throtle responce while not realy adding a ton of complexity.

Are you thinking you want to pressurize the air/fuel mix going into the engine? This would make more power. I thought long about this too. But from everything you have written I think you just want to deliver fuel gas at constant pressure to the engine. If you did this an automixer would not be needed. I think a simple pressure regulator delivering fuel gas just below below atmospheric pressure would give consistent engine response.
Rindert