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Post by yhomega on Nov 2, 2016 8:01:30 GMT -8
goo.gl/photos/j76eceSq5UsnvEdh9I did two really small fire and the day after one with 3/4 of the batch box filled draft seems really strong at the riser inlet! the bell has been smoking from various spot at the begining of every burn. Today we did a white mortar to solve that. One more layer it should be good. I always have smoke out of the flue outside. I guess it's because my rocket stove is not yet dry. I have to buy some wood now to fill the beast  thanks you very much for you help satamax and peterberg for your open source design I keep you updated 
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Post by satamax on Nov 2, 2016 22:51:55 GMT -8
Yhomega, two things, are you sure it's smoke you see comming out of the masonry? Or steam? Same for the chimney. In mins, i can check the top of the heat riser, and there's realy no smoke. Then, when the gases go out of the chimney, you can see the white plume of steam, disapearing quickly.
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Post by yhomega on Nov 18, 2016 10:22:13 GMT -8
sorry for the late answer Here is some pictures I took today and few days ago (inside the flue and inside the bell) I have done about 20 burn now goo.gl/photos/zHqVHN4n2sBUZ6ww7Im uploading some video of burn I did today, I think it is steam but not 100%. |
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Post by yhomega on Nov 18, 2016 12:27:30 GMT -8
First burn, almost cold. Burn start at minute 8.Minute 23 you can hear that the rocket noise is a bit weird. Minute 24 I go on the roof so smoke can be seen. youtu.be/Xd4rbGzetP8First burn second part youtu.be/UmqowSJFrHsEnd of the first burn youtu.be/ro8LzrX8dqUAt the end of the first burn, I did a second burn, here is a quick overview : youtu.be/QTnWeER1Rm0Do you think my rocket is running well? smoke (steam?) is normal? I wonder if the draft is good enough and if it is burning properly/efficiently? thanks for your help satamax by the way, the house is nice and warm. Next job is to improve the house insulation! Cheers |
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Post by peterberg on Nov 18, 2016 14:34:50 GMT -8
Steam, definitely.
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Post by satamax on Nov 18, 2016 19:26:19 GMT -8
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Post by yhomega on Nov 19, 2016 1:00:03 GMT -8
awesome, so you think the post combustion is happening and the burn is clean? At 23min you can hear that the sound is a bit weird (like pulsing, coming on and off). I haven't properly calculate my ISA but I belive it's about 2 square meter more than recommanded :/ This was my concern. Satamax, if you need to isolate your roof, I recommand you to check that : www.pacte-energie-solidarite.com/ |
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Post by peterberg on Nov 19, 2016 1:54:54 GMT -8
Hmmm... When the heater is pulsing in mid-burn, there's a kind of restriction somewhere in the whole system. Restriction in the sense of not wide enough to accommodate all the gases that pass when running full tilt.
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Post by satamax on Nov 19, 2016 2:09:28 GMT -8
Hmmm... When the heater is pulsing in mid-burn, there's a kind of restriction somewhere in the whole system. Restriction in the sense of not wide enough to accommodate all the gases that pass when running full tilt. This happens to me, when a piece of wood falls and blocks the port. |
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Post by satamax on Nov 19, 2016 2:11:31 GMT -8
awesome, so you think the post combustion is happening and the burn is clean? At 23min you can hear that the sound is a bit weird (like pulsing, coming on and off). I haven't properly calculate my ISA but I belive it's about 2 square meter more than recommanded :/ This was my concern. Satamax, if you need to isolate your roof, I recommand you to check that : www.pacte-energie-solidarite.com/Roofing is my main job. So, i think i will try a strawbale sarking technique. |
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Post by satamax on Dec 5, 2016 0:43:40 GMT -8
So, any news?
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Post by yhomega on Jan 12, 2017 3:27:59 GMT -8
Hey Satamax I don't know how to get email notification in case someone answer to this thread?! We are using the stove daily, 2-3 burn a day. It burns really well! however, the roof insulation is not completed, and we have been changing windows, door... so we will burn less once the house is finished. I think 1 or 2 more week of work, and 99% the house interior will be finished! have a look to the pictures : goo.gl/photos/uwrSkAtUAsbTU8yy5Also as you can see on the pictures, I have some cracks :/ Most of them are not an issue, but 2 of them leak. A Really really small amount. I never saw smoke leaking but because the material is turning black around this 2 cracks, I guess it's leaking I tried regular white sylicon (mastic), I tried refractory mastic. The refractory mastic work better but still, when the stove is really hot you can see the cracks opening. Would you recommand any paint? or any elastic material to solve that? The wall are made of refractory bricks, but the top is made of concrete (with refractory bricks above the riser) the roughcast (crépi) is made of sand, white cement, and lime cheers |
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Post by satamax on Jan 12, 2017 6:28:42 GMT -8
Well, this is not roughcast, but more of a plaster. My opinion, get some "chaux aériene" (some type of lime you can't get in the us!) with some sand, and some powdered shells. IIRc the mix should be 1/1/1 1 part lime, 1 part sand, one part shell powder.
Or you can do 1/2/2 i think, but not absolutely sure. Tho, your plaster should be thick, 2 or 3cm. To stay soft underneath. And the carbon comming out of the cracks hardens the lime mixture. So cracks are sort of self Healing.
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Post by pinhead on Jan 12, 2017 7:21:56 GMT -8
I've seen the "pulsing" when the secondary air isn't delivering enough preheated oxygen. In this case, the pulses are caused by super-heated smoke reaching around the middle of the riser before burning, which will later ignite causing a pressure spike - pushing air in all directions.
I've always worried about cracks as well in a "solid skin" heater. I suppose that's why masonry stoves are generally double-skinned with an expansion joint between the inner and outer skin. Cob seems to be superior in this regard, though preparing the surface of cob is much different than a solid lime plaster finish from what I've seen.
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Post by yhomega on Jan 17, 2017 5:35:15 GMT -8
Thanks for the advice, but adding a 2-3 cm extra layer is too much work, for a really really small leak :/ Pulsing is not really happening anymore. I take more care when loading the wood. I think it was the issue. This is my secondary air now goo.gl/photos/42Xd9hHYou3nyCtV9and before goo.gl/photos/AT6ikCNj39QuDwuNAthe edges have disapear! I guess it reached more than 1000 degrees?! |
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