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Post by satamax on Sept 18, 2012 0:27:01 GMT -8
Peter, i tried to cut the stuff yesterday, ouch that's tough! Any reccomendations?
Thanks.
Max.
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Post by peterberg on Sept 18, 2012 2:01:28 GMT -8
-have you any picture of the crack? No, I'm sorry. -are the measurements made with or without the glass ? With the glass. Only intake at the front: that more or less square opening between those two bricks. don't you think that kind of a surface treatment in the port would smooth the flow, like a zigzag tripwire or a"golf ball" surface ? No. Tried that before, no discernible difference. The shape of the port and the octagon riser behind it do deliver all the turbulence that's needed. To smooth things, it's possible to chamfer the corners of the firebox left and right of the port. Next incarnation will have these. |
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Post by peterberg on Sept 18, 2012 2:04:53 GMT -8
Peter, i tried to cut the stuff yesterday, ouch that's tough! Any reccomendations? Using a small diamond circular saw suitable for concrete should do the trick. |
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Post by satamax on Sept 18, 2012 2:20:16 GMT -8
Peter, i tried to cut the stuff yesterday, ouch that's tough! Any reccomendations? Using a small diamond circular saw suitable for concrete should do the trick. Going to get this, this afternoon. www.leboncoin.fr/bricolage/251022152.htm?ca=21_s ;D |
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docbb
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Post by docbb on Sept 18, 2012 7:50:58 GMT -8
No. Tried that before, no discernible difference. The shape of the port and the octagon riser behind it do deliver all the turbulence that's needed. To smooth things, it's possible to chamfer the corners of the firebox left and right of the port. Next incarnation will have these. Yes I have seen, but I don't think it is either the good shape neither the good place to use it. Should men a massive one use, it would be at the entrance like on this commercial one (Tonwerk)   I use to build model planes and boats ans I would be prone to use a thiner tripwire and ahead in the port ,  It was in the right place ine the small "J" experiment , but not in the horizontal one. |
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Post by peterberg on Sept 18, 2012 8:10:11 GMT -8
I use to build model planes and boats ans I would be prone to use a thiner tripwire and ahead in the port, It was in the right place ine the small "J" experiment, but not in the horizontal one. I won't ask you to believe me. You are completely free to build what you want, especially when you think you could do better. So I'll sit back and await your beyond a doubt excellent results. |
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Post by peterberg on Sept 18, 2012 8:22:56 GMT -8
Max,
I've found a way to measure whether EGR (exhaust gas recycling) would be a viable possibility in this stove. I've used the Testo 330 to do an extended draw measurement in both the p-channel and the 1st barrel over the casting. In short: the pressure in the barrel happens to be consequently lower compared to the channel.
The numbers: lowest level in the barrel -0.27 mbar, in the channel -0.16 mbar, at the top of the burn.
So, when the channel were coupled to the bell, it would function as a bypass. And of course we don't want that to happen.
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Post by satamax on Sept 18, 2012 8:49:02 GMT -8
Hi everybody. Thanks a lot for the reply Peter. You know most of what goes into my head is lunatic thoughts ;D I'm working on the batch rocket. More pics tonight. I hope. By the way i have asked Ernie, at permies, if he would still consider the later i've drawn, a real rocket stove. No reply so far  Again, i have a question. Do you think i could do the V shape at the bottom out of metal? In the mean time, for testing purposes. Well, there's a thought behind this, if it could be made into a grate, for air supply through the embers. Bye. Max. |
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Post by peterberg on Sept 18, 2012 10:28:35 GMT -8
Again, i have a question. Do you think i could do the V shape at the bottom out of metal? In the mean time, for testing purposes. Well, there's a thought behind this, if it could be made into a grate, for air supply through the embers. The V-shape of the bottom in metal, for testing purposes only, can be done. Not really good for permanent use, because it will get very hot and will degrade rather quickly. Shaped as a grate, not good at all and no need for as well. The embers will be gone rather quick, even without a grate because the air is blowing continuously at the front side of the pile. So I do recommend against it, you'd be better off making it right first time. |
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Post by satamax on Sept 18, 2012 12:48:02 GMT -8
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Post by satamax on Sept 19, 2012 13:33:57 GMT -8
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docbb
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Post by docbb on Sept 20, 2012 5:27:43 GMT -8
Max, I've found a way to measure whether EGR (exhaust gas recycling) would be a viable possibility in this stove. Max, in your case I think you could stand two shells (~1/4 tubes ) inside the post-combustion chamber, leaving a gap between the rear wall and the shell leading to the tunnel giving you a venturi which will pump the the post-combustion gases and reinject them into the main flow/flame congratulations for your building. |
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Post by satamax on Sept 21, 2012 7:34:54 GMT -8
Peter, if you pop around, how do i test?
Should i insulate the chimney straight away?
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Post by peterberg on Sept 21, 2012 9:01:04 GMT -8
Peter, if you pop around, how do i test? Should i insulate the chimney straight away? Max, it's best to insulate both the riser and firebox straight away. Improvise somewhat, use rockwool or whatever you have at hand. Use both the riser elements, place the thing on a pile of bricks or rocks to raise it from the ground. This way, you are able to see better what you are doing. About the firing itself: make a very small fire right in front of the port. When the smoke is not going into the riser right away, blowing softly will help. After a few minutes the flames will be drawn into the port, the roaring noise will start at the same time but very softly at first. Add some more fuel, keep in mind you have to maintain the noise. When adding fuel the sound should intensify, that's a good sign. Don't overdo things, filling up to about half the firebox is large enough for a first fire. Try to avoid shifting the fuel into the port, in this stage this will cause smoke. Best of luck! |
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Post by koldenburg on Sept 22, 2012 14:10:20 GMT -8
Thanks for all the updates. How is the burner sealed to the bottom of the barrel?
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