Hi Anthony,
Basically… the principle involved … is to extract the heat from the wood, store it in a thermal mass then transport to where needed.
The most practical way to do this, that I’ve heard, is water. A double wall or water jacketed fire box and an insulated water tank for storage, insulated with lots of papercrete of course. You will probably want a good pump for circulation and a safety valve in case the pump fails. The idea is to get the fire as hot as possible for complete combustion. The purpose of a tall stack is primarily for good draw. Unfortunately this wastes a lot of heat. You can design with a forced draft that eliminates the need for a hot stack thus allowing increased heat recovery.
Hope this helps a little
I have watched the post for a while now but really haven't posted. Now
I have a question. I know that this group has a varied group of
opinions. Outdoor woodburning boilers. I did a search this morning
hoping to get plans to make my own. Moneys tight and
cold. I have not found plans but I have found lots of flaming by govt
organizations. I hate to be the doubting thomas but I can't help but
to believe that some if not all this flaming is indirectly from the
existing fuel industry. But it has raised several questions for me I
am hoping to get answered. Can these be built more effecient it seems
that oxygen starvation is how these units work(leading to smoke)? I
have read a longer chimney is better anybody have an idea on how tall?
Does anyone have plans or know where I can find them? I am genuinly
curious as to everyones opinion, I personnally live in the country, I
have enough deadfall around my house to heat for years, and thanks to
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