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Post by Orange on May 27, 2018 5:34:52 GMT -8
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Post by travis on May 27, 2018 5:54:30 GMT -8
Nice. Yup like a second port. Yeah I was surprised by this because I haven’t seen such a bright orange in anything I’ve built before. But that’s only a few stoves.
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Post by peterberg on May 27, 2018 6:31:03 GMT -8
Hi Travis,
About the heater: I think the CSA of the port on top of the riser is just under system size. But that isn't the important point here. It might be that by making the riser wider and narrower again the gases are lured into the idea that the riser is quite a bit longer. This might be a change in shape and possibilities, as I often say, there are a lot of ways to burn wood the right way.
I honestly don't know whether your materials are good enough to withstand the new temperatures. What I do know is this: in most of my systems it isn't easy to get up to red glowing bricks. What time did you fire the stove before seeing this phenomenon?
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Post by peterberg on May 27, 2018 6:44:06 GMT -8
No I didn't, just playing with the idea last winter. |
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serg247
Junior Member
The mountain can not be conquered, it can allow it to ascend...
Posts: 111 
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Post by serg247 on May 27, 2018 7:15:02 GMT -8
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Post by travis on May 28, 2018 5:44:59 GMT -8
Hi peterberg did you ever tried risers with a larger diameter ? (I'm sure you did!) For example here I'll try a 165 mm batch firebox and a 240 mm riser. What were the results like ? I wonder if it may be a possibility to shorten the risers. Thanks, Orange thisvis where i saw that Yasins risers would actually be a much larger diameter from 160. Im not sure if this is correct but I think so. |
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Post by Orange on May 28, 2018 6:06:39 GMT -8
notice that the bell after his riser looks like a 3-sided riser. Matt's tiny stove is similar. Also smaller chimney CSA than riser CSA is possible. maybe the riser is not that important since most of the job is done by a port with secondary air. Now I'm curious about your 2-port BB  |
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Post by travis on May 29, 2018 5:31:43 GMT -8
Yes so am I. I had some troublesome leaks in my radiator system so now that they are fixed I hope to do another test fire to see if the results continue to be consistently as good as before.
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Post by travis on May 29, 2018 5:34:13 GMT -8
Serg
What is the purpose of the brick cover on the riser? Is it mainly to protect the top of the bell if it is metal?
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serg247
Junior Member
The mountain can not be conquered, it can allow it to ascend...
Posts: 111
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Post by serg247 on May 29, 2018 8:38:17 GMT -8
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Post by travis on May 29, 2018 16:14:24 GMT -8
To me this seems similar to lowering the top gap but still being able to build a tall bell yes?
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Post by peterberg on Sept 6, 2018 5:35:07 GMT -8
I made a few changes today to try and check what has made improvements in the stoves performance. I may have stumbled on something new. I haven’t read of anything like it the forums before. Hi Travis, I'm convinced you've stumbled on something new. I tried this at home, built out of ceramic fibre board. It's a 120 mm system in two barrels, straight riser behind the firebox and above that widening to 200 mm. With a lid on it, reducing the outlet of the riser to 120x120 mm again. Height of the trumpet expansion part is just 210 mm with a lid on it of 50 mm thickness. In short: it works and yields remarkable results. I tried it as an open system without a door, with and without secondary air by means of a floor channel. Latest test as of today: riser end reduced to 113 cm², being smaller than the square riser but the same as 120 mm round. Floor channel mounted and also a threshold of 60 mm to damp down the racing of the burn somewhat. Results of two measured runs are quite positive. The thing is very, very powerful, burns remarkably clean. I will start a new thread about this, next addition could be a door of some sort. |
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Ralf
New Member
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Post by Ralf on Sept 6, 2018 23:03:03 GMT -8
Hi Peter, just for my understanding: Heat riser behind the port is round and system size to enable the rams horn double vortex. Above that does it taper into a cone shape or widen abruptly to a bigger "riser box" that is partly capped at the top? If it´s the latter it seems like a logical progression of your findings in the "Mallorca build", where there's already a small shape transition after the lower part of the riser. Would be something to consider for my next build... Ralf |
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Post by peterberg on Sept 7, 2018 0:37:51 GMT -8
No, heat riser behind the port is square with two chamfered corners in the back, just a bit higher than the level of the port. As such, it is similar to the Mallorca build.
Above the level of the firebox the riser is widening out to left and right and to the front, so the cone shape is a-symmetrical. About 20 cm higher there's a lid on it, restricting the opening to system size again.
Just wait and keep an eye on the forum, I will publish within a week starting a new thread.
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Post by Vortex on Sept 7, 2018 0:46:47 GMT -8
I couldn't follow what Travis had done when I last read this thread, but seeing this picture makes it clear to me now: www.dropbox.com/sh/v8pwo2oiaoa4p1r/AADNtSFouG-4XEwq7ZsuPWFUa?dl=0&preview=20180527_183207.jpgI found the same kind of thing with my experiments this summer, a chamber after a port followed by another larger port, slows down the gasses and allows them to mix and burn in a super hot environment. Adding a bit more Time for the Temperature and Turbulence to do their work. Well done, Travis |
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donkey32.proboards.com/thread/1012/glowing-orange-firebrick-temp
