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Post by peterberg on Jun 7, 2019 11:36:27 GMT -8
Peter sorry I didn't understand if you left the drawing without a door. another thing, for your tests that ISA did you use? I'm not sure what you mean. The goal is to develop two versions: one without and one with a door. I am busy with the door version now, to get the air supply right. The development model is a 125 mm system housed in a two barrel tower, the correct ISA for a batchrocket of that size. |
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Post by independentenergy on Jun 7, 2019 12:24:11 GMT -8
the method for calculating ISA is like that of Batch Box? for a 150 mm 4/5 square meter system, can they be OK?
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Post by peterberg on Jun 7, 2019 12:38:24 GMT -8
The promised pictures. The first is the intermediate frame, has been in use for three trial runs only. Built out of 40x30x1.5 mm duct, air slots left and right, inside and out. The outside slots appeared to be far too large, the thing could be run with half of that csa.  Here's the larger air frame already mounted between the refractory core and the door frame.  The vertical ducts are closed in the picture above but in fact there are two ways to get the air in: one from the top of the vertical airframe ducts. Or through the door valve under a lower beam and from there to the vertical duct, shown by the other pictures.   After several trial runs yesterday I did two recorded runs today. One with a couple of pallet lumps and lots of small lumber scraps on top. I was still figuring out the openings during this run so the diagram is a bit sloppy but not bad at all.  This evening run was done with proper oak and ash fuel, tinder on top.  Results are excellent, let down a bit by the erratic temperature readings.  Relatively long run, no overfuel situation at all, solidly burning through without any hiccups. By the way, these two runs are done without stumbler and I emptied the riser beforehand so the floor of this is lower again. I am getting pretty close now. |
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Post by peterberg on Jun 7, 2019 12:39:14 GMT -8
the method for calculating ISA is like that of Batch Box? for a 150 mm 4/5 square meter system, can they be OK? Yes and yes. |
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Post by travis on Jun 10, 2019 5:33:48 GMT -8
Peter Ive been thinking more about sizes and wondering if i can pick my base number that fits our bricks and calculate backwards to the system size and other numbers? A base of 120 is very ideal and could still have a box length of 600mm. Does this sound like a good idea or like trouble?
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Post by peterberg on Jun 10, 2019 9:17:47 GMT -8
Peter Ive been thinking more about sizes and wondering if i can pick my base number that fits our bricks and calculate backwards to the system size and other numbers? A base of 120 is very ideal and could still have a box length of 600mm. Does this sound like a good idea or like trouble? Yes you are right it can be done that way, that's the beauty of a scalable system. Yours will be a 165 mm system with a 25% extended firebox. Should work right out of the box as far as I can tell. This is all new, so please keep us posted. |
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Post by travis on Jun 10, 2019 16:32:05 GMT -8
Ok great that matches what I did pretty much. I put it as 166.5 mm but that’s all within tolerances eh? Haha I hope to start working with it out in the yard soon!
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Post by travis on Jun 12, 2019 5:43:43 GMT -8
Here is the test core that I put together this afternoon! It had to be pretty fast because I won't have free time for awhile in the coming weeks. It is a 166mm system. I decided I want to try a base of 120 so that brick cutting is minimized that much more especially getting proper height for firebox and top box. Dimensions Firebox W 240. H 360 L 620 Port W 60 H 264 Depth 60 Riser stub H 420 166 x 166 Top box W 240 H 240 Exit port W 240 L 88 or about 90 Peter So far I have burned two small loads of wood and it seems to do quite well with very little smoke at the beginning and after fire is developed pretty much nothing at all. Here are a couple photos. You have put in good work and even clay brick does well. I look forward to building it in our house! www.dropbox.com/sh/f6il49m1yss8jh0/AADTAu2zzAhwLTSXCVIJF5CLa?dl=0 |
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Post by Orange on Jun 12, 2019 23:27:08 GMT -8
yasin's batchblock is similar to DSR2 and it doesn't require ceramic wool or any kind of insulation so I guess DSR2 will also operate well without it.
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Post by peterberg on Jun 13, 2019 7:23:04 GMT -8
Dimensions Firebox W 240. H 360 L 620 Port W 60 H 264 Depth 60 Riser stub H 420 166 x 166 Top box W 240 H 240 Exit port W 240 L 88 or about 90 Travis, it might be that the exit port is on the large side of things. In my tested configuration its csa is 5% to 10% larger than the normal port. I'd recommend to implement the stumbler in the ceiling of the top box, building the permanent version. |
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Post by peterberg on Jun 13, 2019 7:31:06 GMT -8
yasin's batchblock is similar to DSR2 and it doesn't require ceramic wool or any kind of insulation so I guess DSR2 will also operate well without it. I've never said it required superwool. Yasin used split firebricks to shrink the space to riser proportion. At the time I didn't have splits at hand but 1" superwool did work as well. Heating up of the riser is quicker this way, CF board could be another option. Question remains whether or not the system would work properly without infill at all, this could be tested sometime. At the moment I could take the wool out but getting it in again would make a hassle of partly demantling the setup. |
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Post by independentenergy on Jun 13, 2019 7:40:07 GMT -8
Peter the bottom of the riser is flat isn't there the ramp with me in the batch box?
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Post by peterberg on Jun 13, 2019 11:21:11 GMT -8
Peter the bottom of the riser is flat isn't there the ramp with me in the batch box? The ramp in the riser is left out, yes. Combination with floor channel is tested like that and it works. |
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Post by travis on Jun 13, 2019 22:46:52 GMT -8
Thank you Peter. I had calculated 77 percent of base rather than 5 percent more than port size itself.
When I get the chance I am considering making the port in the side to use the top box as a cook top. Just out of curiosity. Then I will add the stumbler as well i think
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Post by travis on Jun 13, 2019 22:49:53 GMT -8
Down to 68 or 70mm should be more like it right?
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