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Post by dustinmattison on Nov 30, 2015 14:53:59 GMT -8
I don't want any heat to go out into the space around the stove. What is the best way, or several good ways to insulate it?
Is there some type of fireproof insulation that is manufactured, or is perlite/clay the best option?
How thick should it be?
Dustin
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stoker
Junior Member
Posts: 61
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Post by stoker on Apr 14, 2016 12:57:17 GMT -8
There are some problems with doing this. Essentially, it makes the barrel pointless. You haven't said what you want the hot gases to do after leaving the barrel, but it would be better for them to go there directly rather than having a barrel.
Consider what makes the gases flow in a conventional riser-and-barrel rocket stove. In the insulated riser the gases are very hot and therefore low-density. They emerge from the riser and hit the top of the barrel which cools them down, since the barrel is shedding heat to the room. The cooled gases then flow down the barrel; they are denser than the gases in the riser. That difference in density is what causes the flow.
If your barrel is well-insulated then the temperature will be the same in the riser and barrel, so there will be nothing to make gases flow through the system. (You could have a chimney or something further down somewhere else, but this would be wasting heat.)
The other problem is that if your barrel is as hot as your riser, it will crumble into a pile of oxidised flakes after little while. See the pictures from people who have tried using steel on the inside of their risers. (This is if you have insulation on the outside of the metal. If you insulate the inside then the metal will be protected.)
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