adiel
Junior Member
Posts: 119
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Post by adiel on Feb 12, 2015 23:00:00 GMT -8
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Post by satamax on Feb 12, 2015 23:26:34 GMT -8
Well, i'm sure i've seen one batch rocket which was set up that way, but can't find it. I'm working on it tho. And have a very simple idea for this.
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Post by peterberg on Feb 13, 2015 1:36:54 GMT -8
so i tried this and i know joris has done it but its not working. any ideas why? The difference compared to what Joris has done is that you are using a side riser. Matt did something similar but positioned the port as close to the glass as possible. Yours is opposite the glass. Just out of curiosity: what isn't working? The video looks good, lots of people would be very proud of such an achievement. OK, I know, we're not easily impressed anymore. |
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Post by satamax on Feb 13, 2015 2:37:52 GMT -8
Peter, i think Adiel was just saying his was with a front door, and a side window. And wondered why nobody turned that side window into a side door. I think it's perfectly possible, and think i've seen one. In prototype form. But can't seem to find it.
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Post by shilo on Feb 13, 2015 6:09:05 GMT -8
what isn't working?
when he opened the side door, a lot of smoke escape.
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Post by satamax on Feb 13, 2015 6:34:45 GMT -8
what isn't working? when he opened the side door, a lot of smoke escape. That's normal, CSA is not respected that way. Should be all right if you open only at ember stage. |
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Post by peterberg on Feb 13, 2015 7:43:03 GMT -8
Hmmm... The loading door air inlet is open and you open another large gap about twice the size of the loading door while the stove is running full tilt. Would you also be surprised when all smoke broke loose by lifting the top deck? Actually, I would be very surprised when it didn't.
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adiel
Junior Member
Posts: 119
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Post by adiel on Feb 13, 2015 13:05:48 GMT -8
Hmmm... The loading door air inlet is open and you open another large gap about twice the size of the loading door while the stove is running full tilt. Would you also be surprised when all smoke broke loose by lifting the top deck? Actually, I would be very surprised when it didn't. well thanks dut i want to use it as a loading door. i'll try with the stright batch box. you say its good to move the port closer to the window? |
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Post by peterberg on Feb 13, 2015 13:27:53 GMT -8
Moving the port closer to the window create a stream of hot gases right behind the glass. That is supposed to help keeping the glass clean.
When you want the side window to use as a loading door it's still not recommended to open it during full burn.
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Post by satamax on Feb 13, 2015 18:51:08 GMT -8
Well, i think there could be few tricks to get that right. (or a smidge better)
First of all, forget the front door altogether. As Peter said; he uses welder gloves for reloading the fire. Kind of proves that it's not the best spot, for loading the stove, since it's rather narow.
So, get rid of the front door, and also of the primary air port. Which would then be moved to the side door. I would say, opposite to the heat riser's port. I would make it a thin vertical slot on the edge of the window. To make an air wash which would act as a primary air "slot". And i would place the hinges opposite to that. So when you open the door, the air flow remains the same for a few seconds, untill the CSA of the opened door fucks everything up.
And the other thing would be to have an arangement of puleys and cables, or gears etc!. Attached to the door, which would open a gate, or guillotine, or whatever you'd want to call it. So the exhaust of the heat riser would go directly into the chimney, bypassing the barrel (radiator) and mass or bell; while the door is open.
I admit this last one would be hard to get right. With dilatation of metals of the gate. Tho, may be, that could mean, your rocket could be used as an open fireplace if you wanted; for looks and feeling.
Hth.
Max.
I didn't want to let this out at first; so; I have to write this here. This is "prior art" i don't know if someone had the idea before. But if not patented yet, on on the course of being. I would like the idea to be considered "public domain"
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adiel
Junior Member
Posts: 119
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Post by adiel on Feb 13, 2015 22:33:49 GMT -8
yes. a guillotine. ahhhh. that would be a m a z i n g.
i think first thing will be to try it with a stright batch box. if joris did it... is he here? can he report how it is? robert told me that there is no smoke back.
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Post by satamax on Feb 14, 2015 1:08:24 GMT -8
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Post by patamos on Feb 14, 2015 23:12:02 GMT -8
Joris was kind enough to share some sketch up files with me a while back. I haven't had a super close look at them, but my sense is he has the heat riser pulling from one end and some sort of primary air intake at the innermost (far back) corner at the other end. Could be that when he opens the door there is still enough air flow straight through the chamber to keep the gasses moving in that direction.
However, your side riser configuration surely changes all kinds of gas flow dynamics
Regarding the guillotine… a bypass/start up flue damper ought to achieve the same effect, with other benefits too. It can be a simple as a damper between two T's. DCish shows a simple variant on his modification of a metal box stove.
I've lately been pondering trying a side riser and am wondering if the secontary air intake can be via a tall thin metal plate alongside one wall, with a Sjang type port aiming straight across the throat… has anyone tried this out?
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Post by ericvw on Feb 15, 2015 8:09:03 GMT -8
Hi patamos, I think I can visualize what you're proposing, but would you consider putting up a quick sketch? This notion of yours is intriguing. Thanks, Eric VW |
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Post by peterberg on Feb 15, 2015 10:18:26 GMT -8
I've lately been pondering trying a side riser and am wondering if the secontary air intake can be via a tall thin metal plate alongside one wall, with a Sjang type port aiming straight across the throat… has anyone tried this out? Yes, I did. Years ago on another design. Both sides of the firebox were lined with a reinforced metal plate where the air was streaming up behind. The plates warped beyond usability in short order and I switched to metal rectangle duct instead. The point is: you have to provide enough cooling by the incoming air otherwise the steel will eaten by the fire. Also, in order to feed lots of air in, it has to be streaming up. Before you say that the p-channel doesn't do that, you are right. That channel is feeding down over a distance of 4" but it is situated very close to the spot with strongest under pressure. Thus when heating up, the air is struggling up against the stream direction instead of down. By doing that, the air is heated up to absurd high temperatures. It's not that you need lots of air, far from that. The exhaust gases of most heaters contain twice as much air than needed for combustion, heated up and sent through the chimney. Try to reduce the flow of air to the point where the burn get dirty. That will ramp up the efficiency no end. |
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