dvawolk
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DSR2 125mm open system (actual project)
Posts: 272
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Post by dvawolk on Jan 17, 2013 11:53:17 GMT -8
Peter, thank you very much for your sharing of knowledge. I will post the progres of this project in detail, video and photos included. First thing to be maid will be "the engine", outside. And then on. I will post progress in a separate thread with a link to this tread and to bell thread.
I was thinking of installing clean out ports - i will add them. One for each bell and one for the new attachment to the existing chimney.
The existing chimney already has it - i'll skip the bypass.
Oven - i feel i should put it away from the heatriser line...
I was thinking about the bell's material (cause i'm not loaded with cash). Can i make the whole wall of a first bell with fired clay bricks on edges (+ cob outside)?
For the mortar i would use :
8 parts quartz sand (0-1mm)
6 parts lime
1 part cement
For the batchbox engine i will use fireproof mortar RÖFIX 961 (for temperatures up to 1100°C) and firebricks.
And this will be it, i think...
Klemen
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dvawolk
Full Member
DSR2 125mm open system (actual project)
Posts: 272
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Post by dvawolk on Jan 18, 2013 4:31:23 GMT -8
And if the fired clay bricks would be okay? Maybe even ordinary clay bricks (nonfired) with straw inside would be okay? And for the "mortar" clay slip?!
Klemen
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Post by peterberg on Jan 18, 2013 9:00:37 GMT -8
And if the fired clay bricks would be okay? Maybe even ordinary clay bricks (nonfired) with straw inside would be okay? And for the "mortar" clay slip?! Fired clay bricks could be sufficient for the bell, when they are fired at temperatures of 1000- 1200 C. (1830- 2200 F.) They won't hold indefinitely, becoming very brittle. Top plate of the first bell should be refractory material, normal concrete is too great a risk. Clay slip to be used as mortar for the bell walls is OK. |
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Post by satamax on Jan 18, 2013 9:44:21 GMT -8
And if the fired clay bricks would be okay? Maybe even ordinary clay bricks (nonfired) with straw inside would be okay? And for the "mortar" clay slip?! Fired clay bricks could be sufficient for the bell, when they are fired at temperatures of 1000- 1200 C. (1830- 2200 F.) They won't hold indefinitely, becoming very brittle. Top plate of the first bell should be refractory material, normal concrete is too great a risk. Clay slip to be used as mortar for the bell walls is OK. Peter, what would you think of a cast iron plate or 1.5cm steel plate for the top? Not for now. But still thinking about a proper bell'ied one  |
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Post by thierrylah on Jan 18, 2013 14:45:00 GMT -8
Hi everyone! it's been a while since I did not come on the forum, I'll have to catch up the delay! I spend a bit of time to the study of wood gas car Imbert I passed by here to introduce you to my rocket stove horizontal works very well, great drawing! and heats my room with 3 or 4 outbreaks per day. www.flickr.com/photos/rocket_stove/show/thierry |
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Post by prolinuxfan on Jan 20, 2013 11:34:03 GMT -8
I would think that the goal of any Rocket Mass burner or system would be near complete combustion, which can't be achieved in a reducing flame - you have to have excess oxygen or you have unburned fuel in the exhaust.
As a newby, I'm open to correction.
BTW, I've looked at all the pics, but I'm still not clear on what exactly a P-channel is?
Anyone???
Thanks
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dvawolk
Full Member
DSR2 125mm open system (actual project)
Posts: 272
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Post by dvawolk on Jan 20, 2013 12:33:18 GMT -8
I would think that the goal of any Rocket Mass burner or system would be near complete combustion, which can't be achieved in a reducing flame - you have to have excess oxygen or you have unburned fuel in the exhaust. Hi! For a near complete combustion of gasses you need high heat, enough oxygen and turbulence among gasses. If the turbulence is missed then combustibles may not come in contact with oxygen. But if you have too much oxigen it just cools down the combustion zone. It is great if you have just enough oxygen to burn with combustibles but i think Peter stated somewhere here that in gasses that go to chimney 5 or 8% (not sure) of oxygen is nesesarry to have a reliable combustion. BTW, I've looked at all the pics, but I'm still not clear on what exactly a P-channel is? If you look any sketch you can see a metal insert(dark grey color)that goes into the batchbox from the top on the farther end of it. On the sketches it usually measures 60x20mm. This p-channel supplies heated air to burning zone (this is one part of air needed for combustion). Klemen |
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Post by peterberg on Jan 20, 2013 12:35:15 GMT -8
I've looked at all the pics, but I'm still not clear on what exactly a P-channel is? Please, read this thread and all will be clear. |
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Post by prolinuxfan on Jan 21, 2013 17:17:06 GMT -8
I've looked at all the pics, but I'm still not clear on what exactly a P-channel is? Please, read this thread and all will be clear. Sorry for the confusion, as I hadn't noticed the additional pages linked in the bottom left corner in the color band, & was replying to the last visible (old) post on the first page. I've since found them, and read through a few hundred pages of old postings that have been most educational. I even found out what a tripwire is, and I *think* I almost understand what a siphon is in this context. |
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Post by chrisz on Jan 22, 2013 9:28:25 GMT -8
I'm looking @ building a stove simmiliar to what is mentioned as (Peter's Sketch) in post 302...I'm wondering if I want to keep overall height of the unit down,can I build a down draft tube and then go to a bell or two?
If I've not expressed it using the correct terminology, I'll phrase it another way... Can I buid another tube that exits out the bottom, connecting to the J tube, and then cap the two of them with a larger piece of firebrick or even a thick sheet of steel?
A while ago there was a all brick rocket ish design by "Larsmith" if I recall the name correctly. I'd be sort of mixing the batch rocket with Larsmith's design.
Thank you
cz
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Post by satamax on Jan 22, 2013 10:05:53 GMT -8
Update!
A friend quoted me 149 euros for sandblasting the stove. Fcuk sake! And he's a friend.
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Post by Donkey on Jan 22, 2013 10:27:28 GMT -8
I'm looking @ building a stove simmiliar to what is mentioned as (Peter's Sketch) in post 302...I'm wondering if I want to keep overall height of the unit down,can I build a down draft tube and then go to a bell or two? If I've not expressed it using the correct terminology, I'll phrase it another way... Can I buid another tube that exits out the bottom, connecting to the J tube, and then cap the two of them with a larger piece of firebrick or even a thick sheet of steel? A while ago there was a all brick rocket ish design by "Larsmith" if I recall the name correctly. I'd be sort of mixing the batch rocket with Larsmith's design. Thank you cz I'm not really picturing what you're saying... As long as the heat riser is tall enough and insulated well enough to do it's job, there are a lot of options. If you plan to move heat down ANY distance, it sure helps to dump heat on the way. Dunno if this helps much.. Perhaps you should start another thread and detail what you have in mind, including sketches.. ?? |
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dvawolk
Full Member
DSR2 125mm open system (actual project)
Posts: 272
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Post by dvawolk on Jan 22, 2013 11:10:50 GMT -8
Update! A friend quoted me 149 euros for sandblasting the stove. Fcuk sake! And he's a friend. Bring to my country! It should be about 30€. Maybe it's better not to be a friend :-) |
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morticcio
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"The problem with internet quotes is that you can't always depend on their accuracy" - Aristotle
Posts: 371
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Post by morticcio on Jan 24, 2013 2:51:41 GMT -8
Hi, again. I did a sketch to implement brick version of batchbox rocket. Klemen, Don't forget expansion joints between the firebrick core and any internal and external facing brickwork or walls. Here's a link to a build of a bell cookstove to show what I mean www.pyromasse.ca/articles/asturpn_e.html |
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dvawolk
Full Member
DSR2 125mm open system (actual project)
Posts: 272
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Post by dvawolk on Jan 24, 2013 10:09:57 GMT -8
Morticcio! Thanks. I was thinking about that! I will do it! Great link, also! And to all: i started my own thread about a project of 6" RMH with batchbox and horizontal feed and bells. I hope you will follow my thread also as questions are appearing already. (i tested the "engine" today, wohooo!) Here is the link! donkey32.proboards.com/index.cgi?action=display&board=discuss&thread=691Thanks to Peter and to all others who replied to answers to my and others questions. I hope i can count to your support in the future, too. Klemen |
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