Ha, l highly dubt dead possums culd be the reason, afterall, Wayne repots geting 5 miles from a dead cat!
l am unfortunaly the oposite of protection fanatic. This accident sobered me thugh.
I am truely sorry to hear about your cancer surgerys. I hope you are done with them.
Billy, good point. I look up to you at raising my 2 kids, my 2.5 year old son is about starting to help me with simple tasks, l hope he becomes as capable as your kids are in a few years.
Koen, l am preety sure the gasifier from the video is a Swedish Mako downdraft charcoal gasifier. Look again. No cooler condense tank, only 3 big nozzles, no restriction, cooler wery smallâŚ
Ha, the hopper shutoff idea is interasting. Makes sence.
I agree on the simple fire design. Hard to beat simplicity. Its hard to do here thugh, with a max height of the reactor at 65cm and powering a 134hp engine! The reaction zone needs to be shortened/lowered to gain hopper volume/range.
In this spirit, two designs come to mind. My Seat gasifier milti nozzle updraft desigh, or a crossdraft.
Sincce the updraft showed problematic at insulated hoppers, l will, for a start, go with a crossdraft.
And, l second what you sayd on fuel quality. Thats why l was thinking to either make the nozzle or grid adjustible. That way l can set the lengh of nozzle-grid, takeing the gas out at the edge of reduction zone. This shuld burn most tars shuld they be present.
Good Morning (depends on which part of the world you are ),
Koen, thanks for your long reply.
Iâm sorry, but I think you are mistaken here and I would join Kristijanâs statement. And it matches very well with the cross section of the Mako in the swedish gengas book.
Yes, this is for sure a better approach. If you can guarantee good quality char, Iâm absolutely with you.
But if you are traveling around and have to rely on different fuel sources, this may be a problem. This is why downdraft charcoal gasifiers were almost exclusively used in Sweden in WW2, except from the Källe. And today, just think of a bag of BBQ charcoal, which is not engine grade.
This is very interesting and for sure practical experience that Iâm missing so far.
Kristijan, I really like your Seat gasifier. It should for sure be possible to upscale it for the MB.
If you go for a cross-draft, I for myself find the Gohin-Poulenc very inspiring, both gasifier and the filter design. Quite compact and simple. It was very popular in France.
For sure you know this thread: Gohin Poulenc
And there is a french web-site with more information and pictures: Admission d'air par tuyères
There is an interesting nozzle design with two different cross section for the air entry, making it kind of adjustable to the suction load of the engine. In a book from Switzerland I found a drawing of a moveable nozzle. I donât have it here, but will look it up later at home.
The only disadvantage that I have read often about cross-drafts are slag formation and fairly high pressure drop.
Hope that helped a bit and I dindnât wrote just things you all already know.
And Kristijan, hope your eye will be soon OK again! Be careful with eyes and ears, they donât grow again once lost! I was also a bit careless in the past with that, but I can feel the first problems with my ears now. Not too bad, but enough to be an alarming sign for me.
Its late morning here too, and l am from Slovenia, l guess we are close?
Culd you be more exact on which Gohin-poulanc do you reffer to? They made different gasifiers as far as l know.
Slag formation will be somewhat dampened with egr/water drip, and pressure drop will be dampened with placeung the nozzle/grid at a 45° diagonal. A cross between up and cross draft. Thats the primary plan rhughâŚ
I never did read the Gengas book entirely and i should haveâŚ
This particulate section says it all: page 95
âit has been pointed out that rational charring, utilizing all byproducts,
yields large quantities of byproducts that are valuable for the nationâs economy, so that
charcoal operation is well justified and useful for the nation, in spite of its larger wood
consumption.â
Yes, and certain where as Heat for other purposes is needed. Byproduct Charcoal
Types of Charcoal gasifiers: page 100
â(1) up-draft, (2) down-draft, and (3) cross-draft. The Kalle generator may be
considered a fourth type.â
I think a Gilmore style, My style, Bob Style and Kristijanâs are rather the 5 th style⌠as long we keep the charcoal premium grade
Following the updraft principle for good reactivity and the Nozzle sizing and waterdrip for higher temperature controlâŚ
so much we can learn from and ad to the old stylesâŚ
Kristijan,
I do see the similarity with the Mako, it looks however a modified version ? only 3 nozzles and the blower in push mode.
must be a rebuild or copy from model coz the original had a Gragas system vertical center nozzle and the later S1 had four nozzles pointing downwards and a typical egg shape for front installation.
yes, we are not too far away from each other. I live in Germany. Compared to those over the big pond or Koen, itâs pretty close
Yes, of course. I was referring especially to the one shown on the french website: Admission d'air par tuyères
There are some pictures of the gasifier, filter and some drawings of the water cooled nozzle.
The nozzle with the two diameters (one for full power, one for low power or idling) is shown in the last pictures. Everything is written in french, but google translate should help.
Koen, you are right, itâs not exactly a Mako S, maybe a modification, copy or slightly different type. But itâs close.
This is what Max Gasman often says and that is why I try to read everything about gasifiaction what I can get. The books from the 40s are very useful, as there is a lot of condensed practical knowledge and lessons learned. Add the knowledge and materials from today and we have an excellent base for gasification.
Koen, l read trugh all of it last weekend, it offers amazeing knowlidge usefull for all, newbies to profesionals.
I second on all you sayd. I am most interasted in your work regarding other byproducts of charcoal production. Keeep us posted, l wuld love to have a fully developed sistem at home.
Til,
We are quite close then! Chalk a nother line for team Europe
I will send the link to my step mother, she is French. thank you.
If you remember reading my Seat topic, those nozzles are exactly the kind l used first on my Seat crossdraft.
I decided to try and start makeing some progress today.
Cold temps and one eyesight forced me to work slowly but accuretly, and in all dedication my dearest wife came by, with a sharp âwhy are you makeing a mailbox?â
So this gasser is now officialy named âThe Mailbox gasifierâ.
Now, what lead my wife to belive l got a new hobby building mailboxes, is in fact a mufler shaped reaction chamber. Since l extracted the original mufler, l thod of makeing the lower part of the gasifier mufler shaped, and make the light port/air intake look like a tailpipe.
yes, Team Europe is growing. Maybe one day we can organise our own âArgosâ-Event
I read the complete seat story of course And can remember your first nozzle design.
Great to see your progress with the mailbox gasifier.
I donât want to push you, but could you please make a sketch of this if time allows? Is it something like Fig. 13 (from the book "Pegasus Unit, Driving on Wood: The lost art of driving without gasoline)?
Great information exchange guys.
I love to read this.
I am so much enjoying my winter woodstove fireside retirement reading.
Left out is the Australian Pedrick system. A sidedraft with an internal heart plate mass to decrease some of the the disadvantages of side draft charcoaling.
Ask Chris Seymour to chime in as he built one for a heavy duty towing Ford commercial van.
For your MB trunk space KristijanJ, you are finding as BenP did on his in-trunk Mustang car unit that sideways flows rule supreme to fit your space. Even overriding other considerations.
The wine must fit the bottle. You cannot resort to just a larger bladder filled box.
Regards
tree-farmer Steve unruh
Kristijan, if you keep this kind of crafty stealth work going in your gasifier build, you wonât have to pull it out for your yearly inspection. How many exhaust pipes under the car? Yes sir I can prove they give me incredibly better GAS mileage.
KristijanL Mailbox Gasifier. The KLM Gasifier. Sounds good.
Bob
once more I found something in old books. Just say if itâs getting too much.
First, the already promised moveable nozzle for better adjusting to low and high power output:
The legend is in german, but you can see the dotted idle-position and the position for higher loads. And there are cooling fins.
There is also a drawing and a picture of the Källe gasifier, but not much information.
And an example of an updraft gasifier, a bit similar to the forge type. The air inlet seems to be arranged to cool the metal parts of the hearth and thus preheat the air.
All pictures above are from a book from Switzerland, published in 1944. Similar to the swedish gengas book, but even more comprehensive. Lots of gasification theory, many practical examples, recommendations of engine modification and so on. But it is written in german. If anyone is interested, I can send a scan.
Til, not sure if I have seen the Abb. 14. nozzle in the DOW library.
Maybe @Chris could check it out on what you have, and add it to the library if we donât already have it in there. He is The DOW Web Administrator. My memory fails me sometimes these days.
Thanks for posting it. My nozzle does some what the same function, ha and I thought I was coming up with something new. @SteveUnruh you are so right on this gasification stuff, nothing new under the sun here,
Just repeating things that have already been tried, and somethings work quite well I might say.
Bob
Thatâs great Koen, then you could tell us what being said in the text.
Iâm reading by pictures only, and might be missing somethings being said.
Bob
Til,
I wuld like a european âArgosâ wery much! l hope it comes to reality some day.
Yes, the lower skiz no 13 is exactly what l ment. But! Wasnt planing to make that internal cone! But it looks usefull for preventin heat circulation in the hopper so it might be a good idea to add. Thank you!
I like the double nozzle! Does the description say anything about direct positive effects of it?
Bob, its allso gonna be the first tailpipe that sucks instead expell exhaust gas
Steve, hope ChrisS sees this, l am interested.
It wuld seem so yes. Now its just s question of insulateing the lower mailbox hearth to radiate as litle heat as possible.
just a quick reply in my lunch break. More probably later.
Yes, they name the positive effect of similar air velocities at the nozzle at different loads, thus less temperature difference in the reaction zone and quicker adjustment to load changes.
But how big this effect actually is, there is nothing written about that.
The quality, reactivity and size of the charcoal has for sure also a big influence, thus it might be hard to quantify.
Yes, I have the feeling that we are âreinventingâ some designs here. Knowledge getâs lost so fast, if it is not used.
No problem, I will contact Chris. The scan will be my early Christmas gift to the DOW community
I built a two-speed nozzle for my crawler tractor (like Gohin-Poulenc)
I can not conclude to an extraordinary effect. I do not notice any difference when moving from one speed to another.
Maybe this old engine does not have enough variation of RPM (700 to 1600 RPM)
),
