Down Draft Gassifier Wood Burners

Here's the place you can post your favorite wood burning stove and also information on how to build and where to get supplies.
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zelph
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Down Draft Gassifier Wood Burners

Postby zelph » Thu Dec 27, 2007 11:53 pm

I'd like everyones input on where the downdraft wood gassifier stove for backpacking originated.

I'm stymied by the thought of a wood fire burning downward instead of in an upward fashion.

I'm begining to wonder if this type of stove is in the class of an "Urban Legend"

If you have read somewhere some information that would be helpful here please post it.

I have not tried to build one according to what I've seen on Backpackinglight.com I will build one when time permits so I can see what is actually happening when the stove is fired up.

Look forward to all input and thanks in advance.
http://www.woodgaz-stove.com/

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zelph
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Re: Down Draft Gassifier Wood Burners

Postby zelph » Fri Dec 28, 2007 1:03 am

Here is a link to a thread that has a diagram of how it works. It's from Backpackinglight.com
http://www.woodgaz-stove.com/

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Pure Mahem
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Re: Down Draft Gassifier Wood Burners

Postby Pure Mahem » Fri Dec 28, 2007 1:06 am

I saw the guys on inventor nation make one on one of there episodes. Pretty neat but I couldn't tell you how to build one. Might try the discovery channel . com under inventor nation. that might give you a few leads. this show has got me convinced to build a windmill to power my house, when I build it that is. Hopefully the technology will be more abundant so I can just paint my roof an hook some wires to it and solar power will do it all. I would really like to build next to a nice medium size brook so I can put my own hydroelectric generator in. Oh and amongst my searches I found this green toilet it cost like $1350 dollars but you don't need a septic system. And it doesn't smell and uses no water it is awesome. you pull these bars in and out once every one to two weeks and empty the bottom once a year. And it's not smelly to empty it's all compost you can through in the garden. Pretty cool but I'd probably pay the guy who installs it to come check it once a year so he can empty it, lol! :mrgreen: Oh also they were showing these roofs were they grow grass on them in the cities its suppose to lower the temperatures of the cities pretty cool stuff. sorry to wander on you.I had to vent my accumalated knowledge before it drove me into a simple coma. :mrgreen:
"Lad I don't know where you've been. But, I see you won first prize!"

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zelph
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Re: Down Draft Gassifier Wood Burners

Postby zelph » Fri Dec 28, 2007 1:14 am

Sure go ahead and vent :) I'll check the info out, looks interesting. Photovoltaics has always interested me, wish my roof was covered with cells. Thanks for the info and go ahead vent some more if it makes you feel better :mrgreen:
http://www.woodgaz-stove.com/

terry7
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Re: Down Draft Gassifier Wood Burners

Postby terry7 » Sun Dec 30, 2007 2:33 pm

I have seen one on the net. It was made out of stainless steel and weighed over 2 lbs. It was made like a Pepsi can stove. Except there were holes in the bottom so it would draw air and instead of simmer ring holes, there where larger holes on the inside rim. The gas from the burning wood in the bottom would rise inside the double wall and come out the holes around the top of the rim, causing the gas to burn. So you would get a clean burn. When eveything is working right you should have a blue flame. If it was made out of lighter stuff I would have bought one then. I am looking for homemade plans now. Since I am just killing time till the weather warms up, I will try making my own this winter. The idea of not carrying fuel sounds great to me.

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zelph
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Re: Down Draft Gassifier Wood Burners

Postby zelph » Sun Dec 30, 2007 5:08 pm

terry7 wrote:I have seen one on the net. It was made out of stainless steel and weighed over 2 lbs. It was made like a Pepsi can stove. Except there were holes in the bottom so it would draw air and instead of simmer ring holes, there where larger holes on the inside rim. The gas from the burning wood in the bottom would rise inside the double wall and come out the holes around the top of the rim, causing the gas to burn. So you would get a clean burn. When eveything is working right you should have a blue flame. If it was made out of lighter stuff I would have bought one then. I am looking for homemade plans now. Since I am just killing time till the weather warms up, I will try making my own this winter. The idea of not carrying fuel sounds great to me.


I also would just prefer to pickup my fuel as I walk through the woods. Most of the DIY, double walled wood burning stoves that I've seen on different sites are way too small to hold enough wood to boil 2 cups in one filling. They were made out of soup cans inside of porkandbean cans and a multitude of different cans to boot. All were small. All needed constant attention to feeding wood while heating the water. Most builders are trying for the ultimate 212 degrees temps. That's what they want in a stove, I can live with 180-190 degrees.

The photos I've seen look as if plain ole air is coming from the upper holes and pushing it's way into the mass of flames in the center of the stove. The flames want to get up and out and so they wrap themselves around the jet of incoming air and make it look as if flaming gas is coming out of the hole.

Assoon as I can get back in the swing of things I'll make one similar to the one in the upper photos linked to backpackinglight.com

Thanks for your input terry7, with everyones help we'll see if these downdraft backpacking stoves are for real. Anything you see on the net regarding these stoves pleas give links to the sites. It may take awhile to gather the necessary info. We will have ventured and gained :mrgreen:
http://www.woodgaz-stove.com/

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Pure Mahem
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Re: Down Draft Gassifier Wood Burners

Postby Pure Mahem » Sun Dec 30, 2007 5:15 pm

Not DIY but there's one for sale on WB today. Went back and can't find the one I was thinking about, Might of been on hammockforrums I was thinking but either way I'm not finding it. They may have sold it and removed it.
"Lad I don't know where you've been. But, I see you won first prize!"

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samh
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Re: Down Draft Gassifier Wood Burners

Postby samh » Sun Dec 30, 2007 6:25 pm

When I first got interested in DDWG stoves I did a few hours research on the 'net. I built a simple version using Ray Garlington's plans and then branching out from links on Zen Stoves I read some a very technical article on how this style of stove is used to heat homes in countries where raw fuel is at a premium.

http://www.garlington.biz/Ray/WoodGasStove/
http://www.woodgas.com/Woodgas%20stove.pdf

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zelph
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Re: Down Draft Gassifier Wood Burners

Postby zelph » Sun Dec 30, 2007 6:46 pm

samh wrote:When I first got interested in DDWG stoves I did a few hours research on the 'net. I built a simple version using Ray Garlington's plans and then branching out from links on Zen Stoves I read some a very technical article on how this style of stove is used to heat homes in countries where raw fuel is at a premium.

http://www.garlington.biz/Ray/WoodGasStove/
http://www.woodgas.com/Woodgas%20stove.pdf


I read a little of the Garlington WoodGasStove today. It said early on that it is an inverted downdraft stove. Inverted meaning turned upside down. That would then make it an updraft woodGass stove. I think most of us would agree that a twigs, (wood) has to be gassified in order to burn. Heating the wood to that certain degree will cause it to gassify(give off gas) We then need a source of ignition for the gas to burn. In Garlingtons stove he uses alcohol initially to heat the wood. Alcohol that is on fire. As the wood heats up to the right gassifying temp, the gas is ignited by the burning alcohol. A campfire gassifies wood and burns and feeds upon itself.
http://www.woodgaz-stove.com/

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zelph
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Re: Down Draft Gassifier Wood Burners

Postby zelph » Sun Dec 30, 2007 8:51 pm

This is a copy of the Inverted Downdraft Gassifier from woodgas.com: My first impression is this site is the originator of the Downdraft Wood Gassifier. Now were getting some where. Thank You samh. I'll study what was said on the site and see what I come up with.

Image
http://www.woodgaz-stove.com/


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