Making Wood Stoves

Here's the place you can post your favorite wood burning stove and also information on how to build and where to get supplies.
sudden
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Joined: Tue Apr 06, 2010 5:33 pm

Re: Making Wood Stoves

Postby sudden » Tue Jan 28, 2014 12:45 pm

bookmarked it, thanks for the link
"People are not persuaded by what we say, but rather by what they understand."

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zelph
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Re: Making Wood Stoves

Postby zelph » Tue Jan 28, 2014 1:26 pm

Mr. Heater wrote:While surfing the web, I ran across this article. The pictures look pretty vintage, but the stove principals still apply:

http://autonopedia.org/renewable-energy ... od-stoves/


Very nice site. A brief looksee found this:

Chapter 19
Coking Stoves

A coking or downdraft stove is one in which the smoke must pass through the coals before reaching the flue. The high temperature of the coal bed encourages complete combustion, thus making available the 50 percent or so of the wood's energy that can (and often does) pass out through the chimney in the form of smoke. New fuel is first coked (distilled), and then gradually settles down into the zone of active combustion to provide heat for the next charge. Properly operating, such a stove should be smokeless and free of creosote.

The main challenge in building a coking stove is to get the smoke to go downward rather than upward. Larry Gay, in The Complete Book of Heating with Wood, gives an interesting account of how Benjamin Franklin conceived, designed and successfully operated a downdraft stove. Franklin stressed the necessity of connecting his creation to a chimney with a strong draft, and the same requirement holds for any downdraft stove we might build. Today, a builder may be able to compensate for insufficient draft by installing a small booster fan in the stovepipe.

A downdraft stove consists of an inner wood magazine (or coking oven) where the wood is distilled, and an outer box through which the flames and hot gases travel on the way to the flue. Complete combustion occurs near the junction of the inner and outer chambers, and it is here that secondary air should be introduced. When the unit is operating in the downdraft mode, primary air enters the coking oven and travels down toward the coal bed, carrying the smoke and distillation products with it.

As this mixture passes through the coals, the oxygen is consumed in maintaining the fire, while the volatiles are either burned, broken down into simpler compounds, or simply heated. Any flammable substances that manage to leave the coal bed are immediately consumed in the secondary combustion process, providing heat to continue the wood volatilization and to warm the room.

Larry Gay writes that "true downdraft stoves and furnaces have appeared on the American market from time to time, but none has survived because of the same difficulties that Franklin experienced" - chiefly inadequate draft, which allowed smoke to puff into the room when the feed door was opened. Perhaps the reason these units failed the test of the marketplace is that too few people were willing to maintain a stove that required understanding, skill and determination to operate. [/color]In our present era of fuel shortages, however, we may expect renewed interest in efficiency and economy, and downdraft stoves may find increasing favor. Very likely much of the developmental work will have to be done by amateur stove builders. ?
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/

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zelph
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Re: Making Wood Stoves

Postby zelph » Wed Jan 29, 2014 7:53 pm

Can't find those in the USA :mrgreen: Maybe France/Italy :P
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/

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zelph
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Re: Making Wood Stoves

Postby zelph » Tue Apr 22, 2014 1:23 pm

On page 10 they show the top lighting method for smoke free burning of twigs/sticks :)
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/

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zelph
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Re: Making Wood Stoves

Postby zelph » Sat Sep 09, 2017 7:10 pm

That stove in the second video is built bassakwards :mrgreen: First time for everything :o He sure does use some beefy material. The folding woodworking bench with long vise capabilities works nice for the loooong bends.

These videos come at the right time. I'm contemplating a build using stainless sheet stock. I was influenced by the guy that built one using oven baking pans. Hmmm, did I link to that one duh....I'll check. :lol:

Thank you for the links Mr.Heater. Get set for the deep freeze coming :(
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/

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zelph
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Making Wood Stoves

Postby zelph » Sat Sep 09, 2017 7:13 pm

a previous thread started by Mr Heater has been merged with this one.
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/


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