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Post by esbjornaneer on Oct 30, 2015 12:00:45 GMT -8
Cool that you are building right now too! I see you quoting in Euros... I hope you do not mind me asking where you are? I am building in southern Spain (1200m elevation). Great to see your progress!
I would leave an air gap ~5-10cm between any wall and the stove. And ideally insulate the wall of the stove too if it is towards an exterior wall. If you have to fill the gap you have between your wall and the stove I would go for something insulating if it is an exterior wall (sand of the options you gave) and concrete/cob or simmilar if you want to conduct the heat into the wall.
Your system is looking good.
Esbjorn
ps hope you like the edited version of the post.
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Post by satamax on Oct 31, 2015 5:02:12 GMT -8
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Post by satamax on Oct 31, 2015 5:26:25 GMT -8
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Post by byronc on Oct 31, 2015 5:35:09 GMT -8
Nice looking build you have going there Satamax. Is there not an expansion joint/gap between refractory firebox elements and the masonry side blocks? Maybe the photo doesn't show it, but normally there is left a small air-gap (about 3/16 to 1/4 inch) or the gap stuffed with similar thickness of ceramic fiber sheet material. Or maybe the expansion gap will be made automatically with the first firing?
Looking forward the the performance report of your new system.
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Post by satamax on Oct 31, 2015 5:47:01 GMT -8
Byron, i've left about 3mm each side. But will see how it handles heat.
I forgot to say, this thing draws like mad. I have 10.6m² of isa, plus the surface of the tube, which might be another m², and no hint of stalling with temp difference between outside and inside of about 5C° maximum in yesterday's try. Also, all joints are not tight yet. The door isn't, the side tank filling cap, which i've kept was also leaky, and the hole around the down pipe was not tight either.
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Post by Vortex on Oct 31, 2015 10:13:21 GMT -8
Coming together nicely, Max.
Are those standard clay flue liners you're using or something special?
Your first image in the post above isn't showing correctly because of a code error.
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Post by satamax on Oct 31, 2015 12:18:13 GMT -8
Thanks a lot Trev. Well, it's a monster, i've already overloaded it today. Top window is all black.  It's soo cool to see the flame out of the heat riser through that window. Now i'll have to clean It's a shame i won't be able to do anything till next weekend, i think. Real life gets in the way! |
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Post by satamax on Oct 31, 2015 12:22:02 GMT -8
Guys and gals, Usualy in France, the gap between wood and chimney flues has to be 18cm. Seven inches or so. Would you think i could raise my top mass that close to the beams, or i risk scorching thoses? The more mass, the better realy.
Esbjorn, this is an interior wall, and i was hoping it would conduct a bit of heat to the other side! Nope, not working!
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Post by byronc on Oct 31, 2015 14:42:28 GMT -8
Looking good. H'm, 40 air pocket holes in each of those red clay wall building blocks are giving them insulating characteristics.
On protecting the upper wooden beams and joists from heat, maybe use a large sheet of thin tin as a heat shield, and suspend it about 4 inches down from the beams in the area just above the bells.
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Post by satamax on Oct 31, 2015 23:25:44 GMT -8
Looking good. H'm, 40 air pocket holes in each of those red clay wall building blocks are giving them insulating characteristics. Well, i was expecting these to conduct heat a bit. Nope, zilch, nada! If ever i feel like it, i'll rebuild the wall there in poured concrete or something good for a massonry bell's second skin. |
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Post by Daryl on Nov 1, 2015 5:39:40 GMT -8
Are you cooking at all with it? Is there a hot plate or something?
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Post by satamax on Nov 1, 2015 6:15:12 GMT -8
Are you cooking at all with it? Is there a hot plate or something? You see the actual top slab above the firebox? It's just a temporary piece of air entrained concrete. It will be replaced soon by a piece of a cast iron stove top. I have many things to do on this one. I'll go along as time permits. |
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Post by Dan (Upstate NY, USA) on Nov 1, 2015 6:23:44 GMT -8
Cool, looking forward to seeing more, thanks.
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Post by satamax on Nov 2, 2015 11:14:26 GMT -8
Duh, the first bell burns skin! I was stuffing old firebricks between the two bells, dry stacked. I had gloves, but the sleeve on my left arm got caught on the corner, and rose up my arm. I touched the bare metal. Ouch that stings. |
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Post by satamax on Nov 3, 2015 11:46:50 GMT -8
So, a little update. Since it snowed, and i couldn't do much workwise. I've stuffed more bricks in between the two bells today. And capped the first bell with two of the outer flue ellements. Filled with concrete and rocks. It's 265 kg more. so the whole contraption now weights more than 1300kg of mass, plus bits and bobs in metal. My bottom part between second bell and firebox is warming up a smidge. I left a tube of cold acrylic caulking on top, and when i picked it up, i could feel the moisture which had condensated on the tube.  Not dry yet! I used a piece of air entrained concrete as a temporary top. Well, few days later, it has cracked. So now we know for sure, that air entrained concrete can't be even slightly structural in the firebox. I will repport, when i dismantle it, and check for strengh, with a screwdriver or something. I might look into cutting a cast iron top tomorow. I realy want to know if i can boil tea with this! Ahhh, i forgot, there's a "party trick" i love to do with it. Open the top window, and tell people, do you see any smoke? Or even smell burning wood?   |
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It's soo cool to see the flame out of the heat riser through that window. Now i'll have to clean 
Not dry yet!