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Post by satamax on Dec 5, 2017 11:16:31 GMT -8
Peter, could the port be moved forward to the front? No MAx, I don't think so. It took some weeks of fiddling and tinkering during August and September to confine the fire fountain to the back of the tunnel, away from the exhaust opening. Peter, if the exhaust opening was at the back, then, would you think it would be possible?
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Post by peterberg on Dec 5, 2017 14:00:26 GMT -8
Hard to say, maybe you try it? I suspect the burn wouldn't be as clean. Batchrockets work in cross-draft which isn't possible when the (restricted) port is at the front. The whole point of the venturi is a speed-up of the gases, I think that won't work as well when there's a stalled portion of the firebox at the back. Probably when the excess air is very high that it would work but I am sure that's killing efficency.
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Post by satamax on Dec 5, 2017 14:29:56 GMT -8
Ok Peter. No prob for me!
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Post by independentenergy on Dec 6, 2017 3:51:12 GMT -8
peter the non-symmetry of the throat position in the core is due to a practical or technical factor? You spotted the deviation in the drawing I guess. It is done for a practical reason so the top box could be placed a bit to the right, creating a bit more space to the left. The port is still dead centered in the top box because I think the exact position in the firebox isn't that important. The result being a small cook stove consisting of uncut bricks for the most of it. I did the design in one day at the premises so there were some inevitable small bloopers to resolve during the build. ok. . . thanks Peter
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Post by independentenergy on Dec 6, 2017 3:56:29 GMT -8
I should start a new project at home not immediately, it will still take time. . . cooking plate, oven and heater. I would like to use this core, Peter, do you think that the development is currently possible to build something definitive?
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Post by peterberg on Dec 11, 2017 7:41:37 GMT -8
I should start a new project at home not immediately, it will still take time. . . cooking plate, oven and heater. I would like to use this core, Peter, do you think that the development is currently possible to build something definitive? Hard to say although the development models were running really, really clean. So yes, good enough for something definitive.
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Post by independentenergy on Dec 11, 2017 12:03:33 GMT -8
Ok ...thanks peter
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Post by sksshel on Feb 15, 2018 9:29:26 GMT -8
Very interesting. I look forward to the results of your research Peter.
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Post by desiree on Mar 24, 2018 21:04:53 GMT -8
Nubee here. Been reading a lot about batchbox heaters and watching tons of videos about their construction, benefits, etc. I'm fascinated and conceptually hooked.
Is there any online material that explains the principles behind the batchbox design? My goal is to try understanding this so I can determine if/how to convert a conventional wood stove heater into an awesomely efficient wood heater. I live in rural Vermont in a two story 185 year old house with traditional low (6.5 ft) ceilings. I'm old, with little income, so heating with electricity, tank fills of fuel oil and buying/hauling a dozen cords of firewood just aren't gonna work!
Any help - greatly appreciated.
PS. Thinking outside the (batch)box, has anyone converted a ceramic pottery kiln into a batchbox heater?
Desiree
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Post by desiree on Mar 24, 2018 23:29:31 GMT -8
Nubee here. Been reading a lot about batchbox heaters and watching tons of videos about their construction, benefits, etc. I'm fascinated and conceptually hooked. Is there any online material that explains the principles behind the batchbox design? My goal is to try understanding this so I can determine if/how to convert a conventional wood stove heater into an awesomely efficient wood heater. I live in rural Vermont in a two story 185 year old house with traditional low (6.5 ft) ceilings. I'm old, with little income, so heating with electricity, tank fills of fuel oil and buying/hauling a dozen cords of firewood just aren't gonna work! Any help - greatly appreciated. PS. Thinking outside the (batch)box, has anyone converted a ceramic pottery kiln into a batchbox heater? Desiree I found the explanation of principles at batchrocket.eu. Great stuff!
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Post by smarty on Jun 10, 2018 4:03:24 GMT -8
Well, re looking at this drawing. The simplest solution i see. Keep the original shoebox, as is originally. And move the oven in this pic, to it's side. Bit like the cooktop side channels on the cooking stove earlier in this thread. If the shoebox is made out of insulating firebricks. No heat, or barelly any should be lost. The drawing is not correct but the idea is clear, the oven could be next to the core. Instead of a single switchback the size of the tunnel, it could be much larger so it would be able to house a pizza. Nice idea my friend, no doubt there will be more solutions like this. The absence of the vertical riser opens up a multitude of possibilities. Are you both saying that the chamber to the left could be enlarged to accommodate a pizza? And the exit port for gasses moved to the far left corner of the enlarged chamber?
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Post by peterberg on Jun 10, 2018 5:37:40 GMT -8
It looks like the Montana design could be altered. In that design there's a switchback to the left which could be enlarged to accommodate pizza cooking. It hasn't been tried before as far as I know so you would be entering unchartered territory. Please let us know if and when you are building it.
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Post by smarty on Jun 12, 2018 12:01:32 GMT -8
When you say that in the Allerton Abbey cook stove you would add a bypass is this just to exclude the bench until the firebox and core are up and running hot? I’m guessing you wouldnt be bypassing the core?
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Post by peterberg on Jun 12, 2018 13:03:40 GMT -8
Just bypassing the bench, not the core. The latter one would be missing the point of a clean and efficient combustion process.
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Post by smarty on Jun 18, 2018 9:31:30 GMT -8
I’m struggling to find the 40 x 50mm box section for the secondary air intake. Other that fabricating something the right size is the dimension where it enters halfway through the port at the top of the firebox critical? I was thinking I could use some 50mm x 50mm and taper it in at both ends to 40mm. I’m guessing the net result should remain the same in terms of airflow? Would this even mean it went slower through the 50 x 50mm central section and heat up more as a result?
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