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Post by TCWhitcroft on Jan 8, 2016 11:57:56 GMT -8
I am interested in knowing if anyone has tried creating a rocket mass heater for exterior seating by encasing the exhaust tubes in a poured concrete bench. I live in Ontario Canada and wish to create a rocket mass heater in a 'c' shape to heat the outdoor bench. The bench would ring a typical ground level fire pit, but keep the rumps of guests warm during cold evenings.
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Post by Dan (Upstate NY, USA) on Jan 8, 2016 18:15:54 GMT -8
My indoor one is mostly concrete, doesn't rain inside though...
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time
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Post by time on Jan 8, 2016 19:22:05 GMT -8
I am also intersted in this. but i can't decide if it is best to create the seats as a concrete bell, or use the exhaust as you have suggested.
Does anyone have thoughts?
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mudder
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Post by mudder on Feb 10, 2016 18:37:03 GMT -8
this same project has been in my head for 2 years now. i have been leaning towards a batch fired matt walker half barrel bench.
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docbb
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Post by docbb on Feb 13, 2016 7:34:22 GMT -8
I am also intersted in this. but i can't decide if it is best to create the seats as a concrete bell, or use the exhaust as you have suggested. Does anyone have thoughts? Thermal conductivity: brick: between 0.6 and 1.3 W / mK concrete: between 1.4 and 1.74W / mK Soapstone: 6.4 W / mK granite: between 3 and 3.5 W / mK sand / gravel: 2 W / mK But I guess this is the homogeneous material. Because air should decrease significantly this value. Well, between the brick and concrete, there is no dramatic difference. The fact that the sand retains heat too long is not a good thing either. The longer you hold the heat longer it will increase the size of the fire(box). No? or en.wikipedia.org/wiki/Thermal_conductivity
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docbb
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Post by docbb on Feb 13, 2016 7:56:41 GMT -8
and difference between a bell a a tube tubular bell ! in a bell you try to obtain a stratification in a tube you try to obtain a circulation
a bell can be a dead end tunnel
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