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Post by Daryl on Feb 21, 2014 6:42:08 GMT -8
Have you build a down draft stove? As soon as the weather breaks I am going to do a tiny science experiment. I was wondering what you guys have done.
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Post by Daryl on Mar 29, 2014 11:51:00 GMT -8
Spent the last 7 hours playing with mini stoves. Rocket and gasifier down drafts and even a sideways rocket. I will build one. Not today but dang it...I am going to do it. He he.
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Post by Vince Runza on Mar 29, 2014 13:28:00 GMT -8
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Post by Daryl on Mar 29, 2014 19:14:15 GMT -8
Maybe it depends on the stove and purpose? The outdoor DIY ones start up pretty quickly. I can't remember how long it takes with the DIY masonry versions. Either way, the stoves are rather fun and cool. I am enjoying learning about them through experience.
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Post by Donkey on Mar 29, 2014 19:51:40 GMT -8
Oh, man!!
My parents had a Riteway in their house, seeing that image took me back!
That thing made creosote like nobody's business. It needed to have an intentional, small chimney fire every month or so or it would get DANGEROUS.
I remember several episodes, with my dad standing on the redwood shingled roof with the garden hose, dribbling low pressure water, chimney streaming 3 feet of flame; him shouting orders, lost into the wind..
Impressionable moments for a young'un..
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Post by Daryl on Apr 6, 2014 5:44:55 GMT -8
I have been thinking about the Intesifire since November and now this downdraft rocket from Caotropheus. Maybe I am looking at this the wrong way but the nontraditional downdraft seems like a great way to force the gases to mix.
My wild guess is that the Intensifire is a sleeve type gasifier that forces the gases to mix through the use of a downdraft. Again, I may be wrong because I can't find much about the design itself.
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Post by Daryl on Apr 18, 2014 6:14:53 GMT -8
This what happens when I have a few too many spare tin cans lying around in the recycle bin. I added a outer layer to the standard riser. Sort of like a gasifier. This little experiment has me leaning more towards using channels than bells when I build my little brick ovens.
Yes, it was falling apart. Yes, I shouldn't have used the tape but I threw this together at the last minute. But it was fun.
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Post by Daryl on Apr 18, 2014 9:14:39 GMT -8
I did two versions of this today. One with holes at the bottom of the outer riser and one without. I leaning towards making this more of a gasifier stove by using the riser/chimney and centering the riser in the midst of the coals.
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Post by jkirk3279 on Jan 20, 2015 15:36:39 GMT -8
I was wondering if anyone had tried to combine Downdraft techniques with Rocket Stoves.
Rockets are fairly simple, really.
Downdraft stoves could be built with an insulated shell, preheated secondary air, and then feed the exhaust to the Rocket stove Riser.
You establish the draft with a fan or a small fire at a bypass throat, and then your main fire burns upside down.
The higher mass of Masonry Rocket Stoves would be a great addition.
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Post by Daryl on Jan 21, 2015 1:52:31 GMT -8
There is a downdraft rocket video on here somewhere that I posted. I will have to dig it up again.
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Post by Daryl on Jan 22, 2015 0:59:25 GMT -8
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Post by jkirk3279 on Feb 3, 2015 12:31:50 GMT -8
Okay, I see what they did there with the slit “throat”.
Although I discover to my surprise that I do not speak Norwegian.
The downdraft tradition is a round “throat” so all the glowing char funnels into it, and all intake air has to be pulled through it.
For running a vehicle, you would need 2” of glowing char to break down the moisture and carbon into CO and H2.
For a downdraft heater, you’d use a much wider throat because your draft would be much weaker.
A stainless steel pipe passing down through the throat would supply the preheated air and you might get the coveted “blue flame”.
Then run the exhaust out into a bell with a riser; smoke should be nonexistent after ten minutes.
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Post by Daryl on Feb 3, 2015 16:00:11 GMT -8
There are some metal rocket stoves that use "grills" on the bottom of the box for downdrafting. Youtube, of course.
The standard batch box rocket is basically a sideways downdraft. Gasifiers don't use bells so I am not sure one is even needed for a downdraft rocket. The "riser" will be horizontal instead of vertical since the double vortex takes place at the base of the riser.
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Post by jelte on Feb 7, 2016 12:34:38 GMT -8
this language you`re hearing is dutch.
if you`re interested in google translating it
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Post by bidouille on May 31, 2016 3:23:37 GMT -8
hi there i'm newbie and come from farwest of france , so excuse my langage , i'll try to be as clear as possible . First thanks to all member of donkey 32 proboard , all of you are so nice to exchange knowledge so BIG THANKS . I start some years ago by doing some wast vegetable oil burner and in the way i came to wood burning , beginning by can stove and going into classic steal stove modifications (first air mod, and second air and insulation ) and i've got some real good results . But now and since some time i'm going into gasifier , but for now i'm playing with batchrocket and i'll made a bell stove batch rocket . In this way i have in mind to try a downdraft version of a batchrocket , so i took peterberg excel paper and use it to a 125 mm system . So i made a quick batch with mud to seal it , and made me test . My first idea is to have a mix into double vortex vertically and the horizontal movement causing by chimney draft , in way to have a 3d double vortex .... More with it i hope to have a gasifier effect using bed of ember to burn all gas at a good range . for now i haven't put fire grate yet so embed fall into the pipe , but grate is the next step because the system is apparently working not so bad . i'll explain what's happened : first fire had to to be suck by chimney , it's not really hard but i've got to put paper into the chimney to start sucking smoke , no by pass there , with a bypass between batch and pipe that will be really easier i think . for about 4 or 5 min smoke disappear , you'll can see on video , i first try with two pipe for chimney , it was to start the system , last video show you the system with just a pipe 0.90 m long . no insulation for now like you'll see . i think this test is hopeful , and i think it could be done with a J tube putting a batch on the top of the J ( i think i'm not shure ) . but let's see the video and talk about it if you want . sorry i can't store video in your site cause they are too big . www.flickr.com/photos/141372694@N07/shares/B3a2g3www.flickr.com/photos/141372694@N07/shares/392R3Pwww.flickr.com/photos/141372694@N07/shares/M258T4 |
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