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Date Posted: 23:09:00 10/14/08 Tue
Author: Neil
Subject: Re: Obvious extension: Boat-Oriented Rocket Stoves...
In reply to: Dan B 's message, "Re: Obvious extension: Boat-Oriented Rocket Stoves..." on 20:38:47 10/14/08 Tue

To make it efficient for heating there are 2 steps - the second isnt really applicable to a boat as it involves running a 2nd flue horizontally through thermal mass (eg floor, cob/stone furniture) - but the first would work: the flue (long upright of the basic J) is surrounded by a metal (or whatever) jacket. When uninsulated this makes a serious radiator. If you just want a hotplate you can insulate to make the job easier and keep all heat radiating just off the top (and in a building capture the heat in the aforementioned thermal mass).

The flaming bits and soot don't tend to make it out the burn tube due to very high levels of combustion, and any material that does is trapped in the back and forth of the various sections of the 2 flues and the radiator drum. There is generally an access point at the elbow at the start of the 2nd flue as this is where any material will tend to collect.

There is going to be waste heat from a rocket stove without the thermal mass, but they burn a LOT more efficiently than a normal stove (as evidenced by the clear exhaust - no smoke), so you will end up with more heat for the same amount of combustible material.

The J rocket stove does self-feed - the combustion runs horizontally and the sticks just drop as they are consumed.

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