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Two way diverter valve in rocket mass heater?  RSS feed

 
pollinator
Posts: 1516
Location: Denver, CO
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I'm wondering about putting a valve in the piping downstream from a rocket mass heater barrel, to divert hot air from one area to another on demand. Is this feasible?

For background, I want this rocket to heat a bench and a set of hot frames. Both many not need to be heated at once, and I don't want to waste heat. The whole rocket is under cover but outside, so potential for a deadly accident if something goes wrong is lower.

If putting some sort of two way valve into a rocket is OK, what kind of hardware would be best for this? I'm thinking I should make it double as a clean out so ash and stuff does not get hung up there.
 
gardener
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Location: Fraser River Headwaters, Zone3, Lat: 53N, Altitude 2750', Boreal/Temperate Rainforest-transition
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Hi Gilbert.

Although I can't direct you to a specific example, there are Rocket Stoves with diverters, to channel the hot gasses from the barrel into a different set of mass bench pipes, or into a bell (stratification chamber), so one could alternate.  It seems logical to do as you mentioned: to also have a clean out at this location.  The easiest place to do so would probably be at the manifold outlet; I have seen a video where this was done, but I don't have a link for you.  I am considering something similar.  Surely someone with experience building these will chime in.  I think any heating supplies store that sells ducts and stove pipe would be able to show you how to build it.   
 
Gilbert Fritz
pollinator
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Good point; the piece I am looking for should already be used in ordinary duct work someplace.
 
gardener
Posts: 2581
Location: Upstate NY, zone 5
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I don't think you will find a suitable drop-in item. I think you will need to modify a standard damper with an off-center unpierced sheetmetal flap to block off one path or the other. This would mount in the fork of a "Y" or tee fitting.
 
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