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Post by fiedia on Feb 10, 2023 11:13:52 GMT -8
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Post by fiedia on Feb 13, 2023 10:54:43 GMT -8
I thought making use of all that mass allready in place was great but perhaps re-building everything would be better...? May be building a bell in front of the chimney?
Could you make a separate thread for your project and describe where you want to build your DSR2 (floor, room size...).
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matt1
New Member
Posts: 4
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Post by matt1 on Sept 18, 2023 4:23:57 GMT -8
If I build a bell around the DSRII core with gaps between the Core and Bell of 7 inches to the left and right side, will this be sufficient, assuming there is a 4-5 inch gap between the exit port of the core and the top of the Bell which will be used as a cooktop. Also, is it best to have no gap between the rear of the core and the back wall of the Bell, or if it is best to have a gap, what would be optimal - would 4 inches suffice? I'm assuming the front face of the Core is flush with the front face of the Bell?
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Post by peterberg on Sept 18, 2023 7:26:43 GMT -8
If I build a bell around the DSRII core with gaps between the Core and Bell of 7 inches to the left and right side, will this be sufficient, assuming there is a 4-5 inch gap between the exit port of the core and the top of the Bell which will be used as a cooktop. It all depends on the size of your core. Assuming a 6" version, the side gaps are sufficient, the top gap is not. The top gap should be at least 6" in my opinion, the same as system size. In order to achieve a working bell system, the cross section area around the core should be at the very least 5 times the cross section area of the system size, preferabably much more. Also, is it best to have no gap between the rear of the core and the back wall of the Bell, or if it is best to have a gap, what would be optimal - would 4 inches suffice? I'm assuming the front face of the Core is flush with the front face of the Bell? A small gap will be sufficient, just to ensure the core isn't physically connected to the outer wall of the bell. Other than at the front, that is. And yes, the front face of the core is flush with the front face of the bell. |
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matt1
New Member
Posts: 4
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Post by matt1 on Sept 19, 2023 4:32:04 GMT -8
Since I am building a cookstove using the DSR2 core, I am only able to have a gap between the bottom of the core and the floor (which I plan to be a rebar-reinforced concrete slab) of 1-4.5 inches depending on whether I use ceramic glass (Rovax) or firebrick slabs as the cooktop. This 1-4.5 inch bottom gap was calculated assuming a 4" gap between top exit port of core and cooktop, recommended as a suitable minimum in a prior post assuming there was plenty of space to the sides of the Bell. If 6" is better, I will increase it, but this will probabky limit me to using a ceramic glass cooktop( because of its minimal thickness) and my bottom gap between Core and floor will be reduced to 2.5 inches.
If I only have a 1-4.5" gap between Core and floor, will it still be a functional system and would such a small gap then require a larger gap between the rear of the Core and the rear wall of the Bell in order that the cooler gases at the bottom of the Bell can flow from one side of the Bell to the other and out through the exit port of the Bell to the Bench? One reason I am using a concrete slab on a cinder block foundation is because of my inability to get a good-sized gap between the bottom of the Core and the floor, without which I'm assuming temperatures will be high in this area.
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matt1
New Member
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Post by matt1 on Sept 20, 2023 5:48:24 GMT -8
It's a 6" system. If there is only a 1" gap between the bottom of the core + the floor, do I then need a larger gap between the rear of the core and the rear wall of the bell, and if so what would be the minimum gap required?
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Post by peterberg on Sept 21, 2023 1:48:09 GMT -8
It's a 6" system. If there is only a 1" gap between the bottom of the core + the floor, do I then need a larger gap between the rear of the core and the rear wall of the bell, and if so what would be the minimum gap required? Just one inch is too cramped, sorry about that. So you'll need a gap between core and bell wall that's about as large as the side gaps. All gases that go down along one of the sides need to go the route at the back in order to reach the exhaust, so there need to be plenty of space in my opinion. You might get away with 5", but that is only guessing. |
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artem
New Member
Posts: 19
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Post by artem on Feb 4, 2024 3:52:42 GMT -8
Hey all, Would anyone might be able to explain what does "overhang" mean in relation to P-channel AKA Floor channel? It seems to be set to the same value as the height of the P-channel in the calculator. Also, I extended the calculator for DSR2 to include some comments as well as extra calculations for:
- position of the stumbling block
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Post by peterberg on Feb 4, 2024 5:49:27 GMT -8
Would anyone might be able to explain what does "overhang" mean in relation to P-channel AKA Floor channel? The floor channel is NOT the same as the p-channel, please read batchrocket.eu/en/designs#pchannel and batchrocket.eu/en/designs#floorchannel, same chapter, separate articles. In short, the p-channel is an overhead duct, feeding at the top half of the port. The floor channel is situated at the floor of the firebox and feeds air in the top half of the port. Both are doing the same job in different ways. The overhang is how much the p-channel overhangs the top of the port. Again, read articles, you might miss the essence of the details. A remark: the DSR2 is tested and approved with a floor channel only. |
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artem
New Member
Posts: 19
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Post by artem on Feb 4, 2024 12:07:53 GMT -8
The floor channel is NOT the same as the p-channel, please read batchrocket.eu/en/designs#pchannel and batchrocket.eu/en/designs#floorchannel, same chapter, separate articles. In short, the p-channel is an overhead duct, feeding at the top half of the port. The floor channel is situated at the floor of the firebox and feeds air in the top half of the port. Both are doing the same job in different ways. Thanks for that Peter, that makes much more sense. I remember reading that vertical part of the floor channel (the end of the angled "roof") should be at the level of the middle of the port, is that the case? |
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Post by peterberg on Feb 4, 2024 13:36:50 GMT -8
I remember reading that vertical part of the floor channel (the end of the angled "roof") should be at the level of the middle of the port, is that the case? A bit different, though. All of the opening in the vertical part should be above the middle of the port. This way, the air is delivered in the top half, primarily. |
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