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Post by satamax on Jul 21, 2013 5:06:00 GMT -8
Peter, you care to tell us?  |
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Post by peterberg on Jul 21, 2013 6:42:33 GMT -8
This is a variant of the batch box rocket, equipped with a p-channel that can be lowered during the burn. I've tested that one about 6 weeks ago, the thing could be persuaded to burn in downdraft mode completely, but the Testo wasn't happy about it. Best results were obtained with a port opening of 40% compared to the riser CSA, the rest is going through the slit in the bottom. This one is built by somebody else, main advantage is the possibility of an ash drawer. And a spectacular sight, don't you think?
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Post by satamax on Jul 21, 2013 8:03:48 GMT -8
Spectacular is the word |
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Post by Donkey on Jul 24, 2013 17:13:07 GMT -8
That is one of the oddest things I've seen in a long time.. I just LOVE it when these stoves do things we've been told are not possible.  |
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Post by peterberg on Jul 25, 2013 2:01:08 GMT -8
About this very experimental stove: The lower opening is closed off by a piece of fireproof glass, about one third of the depth from the front the slit is closed off. At the rear of the lower space there's an opening the width of the normal port, the rest of the port height is above the firebox floor. Above this port there's the p-channel again. This stove didn't have anything to extract the heat during the 5 test runs, except about 10' of horizontal pipe and a bare vertical stack of 6' high. The next setup will be equipped with a firetube heat exchanger, construction as a steam engine, except mounted vertically and operated in downdraft mode, i.e. the gases will be led from top to bottom through it. And yes, it is a strange setup, working partly as a wood gasifier. The results of the 4th and best run are here:  The fifth run went in thermal runaway, the temp in the horizontal exhaust pipe, 5' away from the riser went up to 1520 F. The CO rose to 7500 ppm, the normal noise of the stove rose to a scream, the piece of glass in front of the lower compartment shattered and the chimney was belching smoke. We cooled it down by adding small quantities of water in the p-channel, probably damaging the back of the firebox or the lowest part of the riser. We classified this last event, scaringly as it was, as definitely never-to-repeat. |
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adiel
Junior Member
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Post by adiel on Jan 16, 2014 4:40:34 GMT -8
peter
is there any news with this system? is downdraft is talked about here?
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Post by Daryl on Jan 16, 2014 7:05:42 GMT -8
That is one of the oddest things I've seen in a long time.. Check out the designs of the commercial wood gasifier/boiler furnaces. Some use downdrafts. This is almost exactly the same. From what I understand the Wittus and Intesifire use downdrafts as well. |
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Post by Vortex on Jan 16, 2014 10:12:22 GMT -8
Wow! I didn't see this thread before. Interesting setup, is it intended to be run open fronted when it has a barrel or heat exchanger on it? I found a much longer video of this stove - wish I could understand what's being said - HERE: |
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kpl
New Member
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Post by kpl on Jan 16, 2014 12:49:44 GMT -8
There was a link in a different thread (given by Morticcio) where we could see several other creations of that guy, who built this very interesting setup. Looks like it's being already used commercially. rocket177.blogspot.nl/Check the links to articles on the right side, google translator in chrome browser helps a lot with them. Just basically wonderful stuff. |
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Post by satamax on Feb 3, 2014 14:12:38 GMT -8
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