kpl
New Member
Posts: 47
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Post by kpl on Oct 28, 2014 0:55:04 GMT -8
Hi,
I have read a lot of conversations here and a lot elsewhere on internet, and have tried several stacked brick setups myself, but no actual heater yet.
Has anybody tried to build a batch-box style heater, where heat riser would be located above the firebox, not at the end or side of it? The main idea is to save some space, so the firebox would not stick too much outside of the barrel's side.
Port would be located in a ceiling of firebox, P-channel can be built-in in the ceiling too, and a simple heat riser built above that. Port would not have normally accepted dimensions, it must be more like square or round.
I'm not hoping to get extremely clean burn or anything, just a reasonably working setup.
There is no chimney available there, but there is a hole in a wall just above where I want the heater located. So a simple stovepipe could be routed along the barrel to the top, and then routed outside. Some wool can be wrapped around it, if needed.
I want to heat a small rented workshop (about 25 sq.meters), to be able to use it occasionally during the winter. Idea is to build the lower part from old bricks, and use a barrel above that, getting some combination of quick heat with some amount of heat storage too. Heat storage is required when something has to dry in a workshop, like glue or varnish.
I know, simplest option is to pick up some cheap iron stove, but that would need some heat mass added anyway.
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Post by peterberg on Oct 28, 2014 1:54:50 GMT -8
No, it won't work. It would be just a box stove with an insulated stove pipe on top. The main point why a batch box rocket works is a (short) horizontal flame trajectory. When you take that away the thing will burn like any other iron box stove.
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kpl
New Member
Posts: 47
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Post by kpl on Oct 28, 2014 2:01:10 GMT -8
And main reason for that would be increased turbulence?
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Post by peterberg on Oct 28, 2014 3:13:57 GMT -8
And main reason for that would be increased turbulence? Not only that, but also in a confined, very hot environment. This idea of a riser above the combustion zone is coming by regularly and it has been tried many times. But on the other hand, when you think you've got a new idea please build it and amaze us.
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kpl
New Member
Posts: 47
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Post by kpl on Oct 28, 2014 3:38:39 GMT -8
I would love to experiment, but it's already almost winter. I might actually just try to build it, as most probably it would burn and make heat anyway. I do not have gas analyzer anyway, so no way to tell if it's good or not.
I'm just thinking what are those parameters that are different in this setup, and what could I try to make them better.
As the port would be located at the very far end of firebox, it's general location would not be too different from the normal one. For turbulence, port sides could be angled or whatever, and port will be a bit smaller than CSA anyway. Secondary air can be injected here even simpler than the normal way, as it's not required to route p-channel down to the port, just a straight channel is enough. Riser should be insulated as usually, so no big difference in temperatures.
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Post by Daryl on Oct 28, 2014 5:10:01 GMT -8
The problem with having the riser on top is that you lose the ram effect. I have seen other types of stoves use an above or below port with the ram but the flue is always at the end of the ram's burn tunnel.
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Post by Daryl on Oct 28, 2014 5:38:02 GMT -8
I look forward to what you or anyone else comes up with for this "vertical" rocket.
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Post by spirilis on Oct 28, 2014 7:03:47 GMT -8
did a quick search but couldn't find it - what is the "ram effect" and is it detailed in another thread?
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Post by spirilis on Oct 28, 2014 7:09:27 GMT -8
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Post by grizbach on Oct 28, 2014 10:48:23 GMT -8
Daryl, KPL, A siphon om top of the fire box, could give ok results. Peter was initially experimenting with these.
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Post by satamax on Oct 28, 2014 11:04:32 GMT -8
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Post by peterberg on Oct 28, 2014 11:21:26 GMT -8
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Post by Daryl on Oct 28, 2014 15:30:28 GMT -8
Yes. Sorry about that. The ram's horn pattern.
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Post by Daryl on Oct 28, 2014 16:20:31 GMT -8
Daryl, KPL, A siphon om top of the fire box, could give ok results. Peter was initially experimenting with these.
Ok, so now I can't stop thinking about this.
Issues to tackle: 1. The ram horn 2. Batch box modifications 3. Dispersion/pattern of gas flow through a mass, in my case an oven (that's another toughie)
So, yes, Peter is right. It won't work. But a girl can dream...
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Post by ronyon on Oct 28, 2014 19:07:18 GMT -8
Does a J tube rocket create a double rams horn pattern? How would the top placement of the heat riser affect the dispersement of the gasses?
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