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Post by pioniers on Jul 8, 2014 10:51:48 GMT -8
Hello,
I want to build an 8" rocket mass heater with oildrum. I know from Canyon from an earlier thread that the oildrum wont last long in such a system. I want to use 1 oildrum of which the top will end 1' above the end of the heatriser. Any ideas if this will work?
Thanks,
Pioniers
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radek
Junior Member
Posts: 94
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Post by radek on Jul 8, 2014 12:15:30 GMT -8
hi Pioners i have just finished one 8 inch system and i dont think the drum would survive for long.Maybe if the top of the drum would be protected with layer of fire wool from inside.But thats just a guess.Into 8inch core you can load as much as 14kg...28pound of hard wood and when all this is burning its pretty powerfull.
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Post by Robert on Jul 8, 2014 12:20:02 GMT -8
Just make it in a way that you will be possible to change the barrels. i think i have seen in somewhere on Donke`y stove.
Ps. how is the S-portal development going on?
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Post by pyrophile on Jul 28, 2014 11:57:29 GMT -8
In France, we have thick gasoline or gasoil 200 liters drums from the 1939-1945 war. They were "parachuted" or put away in the sea. They also are reinforced. They can be 45 kg! (reinforced).German, french or american (208liters, I think). Benoit
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Post by satamax on Jul 28, 2014 12:31:56 GMT -8
Pioniers, you could always weld a thick metal plate on top of the barrel!
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Post by talltuk on Aug 6, 2014 12:54:30 GMT -8
Hi folks
how do you think a barrel on a 6" batxh would fair? Trying to work best designs for outdoor heaters and really want the quick radiation. Considered brick built but it loses that aspect, but I do want them to be durable
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Post by matthewwalker on Aug 6, 2014 13:47:53 GMT -8
Yeah man, that works great, and for outdoors you do really want the metal throwing that heat out. My outdoor barrel is still going strong after 3 years of being out there, and it was stripped to bare metal, so it's just straight rust at this point. I keep expecting the grill to fall through the top but it's still holding up.
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Post by DCish on Aug 7, 2014 12:49:41 GMT -8
Isn't it conventional wisdom that the vast majority of the O2 is burned off by the time I hits the radiating barrel, hence it being a long-lived part of rocket stoves in the Evans book?
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Post by matthewwalker on Aug 7, 2014 18:14:52 GMT -8
That was my understanding but I no longer believe that is the case. There is plenty of o2 in the gas stream of a normal J, for sure. I do know the barrels don't break down as fast as you might expect. I personally believe it has more to do with the barrel's ability to shed heat quickly, coupled with my belief that there really isn't much combustion happening at that point in a normal J build with adequate thermal storage. Once the barrel goes on and the mass is online, the gas stream slows down quite a bit and I suspect that while there are times that flame impinges upon the barrel that it is not all the time, or even often, in normal use.
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Post by DCish on Aug 8, 2014 3:06:21 GMT -8
Sounds like a plausible explanation. Thanks.
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Post by Donkey on Aug 8, 2014 11:28:13 GMT -8
It's been my experience that MOST of the time, the barrels will last for years without trouble.
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