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Condensing rocket stove central heating?  RSS feed

 
Posts: 56
Location: Hungary
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Can i make a condensing rocket stove central heating unit?
I mean, i probably could, but what are your thoughts, what problems can i run into?

I plan to make a normal j tube, insulated long heat riser, then do two 90 degree turn to get downwards, where i plan to put a heat exchanger.
This would serve the purpose of the barrel, increasing draft by cooling the gas on its way down.
It would be a welded steel, water heater type exchanger. The gases going to travel in 15 1,5" or 2" pipe connected in parallel, sounded by water. The bottom part of the exchanger is open, since i install the stove outside.

I guess if the pipes are a meter long or so, the exhaust gas will be pretty cold, since the return water in the system is around 25C, and have a lot of surface area. If the exhaust gas really cools down we could benefit from the heat of the condensation, which in turn could re capture the energy that is lost when the water in the wood is boiled. Thus eliminating inefficiency do to wet wood. (well wet wood still affects the burn negatively but its mainly going to slow the burn instead of making it dirty and wasteful)

We live in a home that has floor heating water circuit, and the floors are thick concrete and stone. I calculate at least 16-18 tons of heat storing material. Although this is pretty low temp storage, 25-50 C.

I plan to make a auto feed for this stove, and possibly a little blower for times when some extra output is required.


Now, i see the beauty of the normal RMH concept, and would rather build a stove like that, but i just don't think it would work in a house like ours.
 
He baked a muffin that stole my car! And this tiny ad:
five days of natural building (wofati and cob) and rocket cooktop oct 8-12, 2018
https://permies.com/t/92034/permaculture-projects/days-natural-building-wofati-cob
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