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Post by matthewwalker on Apr 8, 2015 5:46:49 GMT -8
I don't understand the question Max, how long is a burn, or how long do I burn for? The stove itself is pretty much the same burn profile as my big heater, so a batch is around 90 minutes from load to a small coal bed.
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Post by josephcrawley on Apr 9, 2015 8:38:12 GMT -8
Do you think this design would work with a traditional cook top with leaky eyes that can be removed or will that allow to much air leakage?
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Post by satamax on Apr 9, 2015 11:34:23 GMT -8
Matt, i was meaning, how long during the day; do you burn for?
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Post by matthewwalker on Apr 9, 2015 15:41:33 GMT -8
Joseph, I think that sort of top would be great.
Max, well, I don't really know how to answer you. Are you asking about my cook stove, or my heater? They are both in the same room, and it's not winter here any longer. It's pretty much spring going into summer, so I am only burning to cook at this point.
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Post by ronyon on Apr 9, 2015 19:58:58 GMT -8
That oven, "black" is it? Any smoke back from it?
It occurs to me that a scraped electric oven with a glass cooktop could almost be used as is, building the core onto it, ripping out e insulation and adding mass.
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Post by johndepew on Apr 11, 2015 11:18:54 GMT -8
matthewwalker How much more heat extraction after the cooktop could this thing handle? I hadn't looked at your riser-less system until now: that addresses the needs I was trying to get at with my horizontal batch orientation, while taking a similar footprint. I'm thinking of using your design instead and simply adding a bell downstream to pull out more heat before the exhaust.
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Post by matthewwalker on Apr 13, 2015 8:59:03 GMT -8
Ronyon, yep, black oven. Nope, no smoke unless I make it on purpose for cooking.
JD, I think it should be the equivalent of a normal 6" batch with regards to how much load it can handle. I'll reiterate, all of the batches require good final draft to keep velocity up. So long as you mind the Delta T to keep it flowing, it should drive a large-ish storage mass just fine.
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Post by DCish on Apr 19, 2015 17:40:11 GMT -8
Ok, studied the core pics today and added up the brick measurements... looks like the core proper is roughly a 23" cube. Nice and compact, super convenient, fits my space constraints. Next step: sketching up the specifics of my situation as best I can.
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Post by DCish on Apr 20, 2015 17:53:24 GMT -8
walker: I figured I'd try to model your core without modifications in Sketchup first for practice, and things kept not coming out right. Then I realized I'm not allowing for mortar joints. So I'm wondering, with the mortar joints as you have them, does your batch box come in pretty close to PvdB spec? If so, I can model joints so that final dimensions of the box match the PvdB dimensions and just match everything else from there. Regards, DCish.
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Post by matthewwalker on Apr 20, 2015 20:34:01 GMT -8
Yeah, it should be close. I am using the same door I do in the WS, so, yeah.
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Post by patamos on Apr 21, 2015 8:03:34 GMT -8
Hi Matt,
Well, i'm sold. Some friends want a wood-fired cooking-heating unit in an enclosed 350sq.ft. space. I think this is the way to go.
Thanks so much for sharing your work so openly...
I imagine the oven fares so well at lower temperatures because of the warm mass heating things from all directions. Thermal envelope...
Regarding the ceramic glass cook top, I notice the metal perimeter. Am i correct in assuming this is to protect the edges from impact?
Also, do you have a sense of how broad an opening such glass could span without trouble? (Thinking of finishing off a vortex top deck this way…)
Has anyone ever tried to cut ceramic glass on site? I've gone through regular glass with a carbon blade grinder… neither fun nor pretty.
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Post by Bobwieser on Apr 21, 2015 10:55:40 GMT -8
I cut piece of ceramic glass with a cheap wet saw made for floor tiles. The cut is a bit rough and a small part of the corner at the end of the cut broke off. I have low standards, I use it.
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Post by matthewwalker on Apr 21, 2015 15:02:28 GMT -8
I'm with Bob, low standards and all. I've successfully cut ceramic glass with a wet tile saw, but it's not a pretty cut.
I don't know about the span, if you want to put heavy stock pots or such on it I'd support it.
The frame is just finish, since the glass and other metal bits are just set in a clay/sand mortar for the seal.
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docbb
Junior Member
Back from ZA
Posts: 92
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Post by docbb on Apr 24, 2015 0:21:32 GMT -8
Hi Matthew, do you have some picture of the oven settlement?
is the part in front of the chimney part of the bell also?
I have modelled the rocket part in Sketchup but do not have any idea (yes i have several ones) how you did manage the oven
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Post by DCish on Apr 24, 2015 3:02:20 GMT -8
Docbb, I'd love to see your sketch up model of the core if you're willing to share. I started modeling that but am only partway done.
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