The stove's efficiency is very high.

Study the design.. If you don't need one today. You might need one in the future.

The stove I built is very large.. probably too big for most uses, but
is good for making charcoal.
This is what worked for me. It isn't easy to get the details about
how to create these so they work correctly.
Done right, the stove will not smoke, all smoke and gases are burnt as fuel.
They are lit from the top. A downdraft of the heat on the
unburnt fuel releases gases. These gases are directed to the top
of the stove to be burnt.

This stove lacks the follow:
A handle for moving the stove around.
A easy way to close off the stove to extinguish the flame and thus
the creation/saving of charcoal.
No air vents at the bottom, not requiring the use of bricks.
Wind-guard collar or stand-off (can cause smoke if done wrong)

This stove requires it to be placed upon bricks to allow
air flow into the bottom.

A well built stove is very impressive to watch the gas burning,
the only flame you see is from the gases burning.
guns4toys Micro Mini Wood Gas Stove

Video of some nicely done stoves
I didn't know of this guy before I built my stove.
guns4toys Homemade Wood Gas Stove Configurations

Materials I used: sheet metal, metal screws, two bricks.


Oh, even though the stove is smokeless.. the fire alarm will still go off
Hint: adding fuel after lighting the stove will cause it to SMOKE.

Making charcoal is good for feeding plants and filtering water.



Randy
I might be able to get a video up of this stove, no promises.

very nice
So where does the wood go? In between both cylinders?

Kinda looks like this one ..... pre-made of course .....

Biomass Energy Foundation Bookstore

Regards, Glen

I've been dreaming about this as an application for the bedini fan.

thanks randy going to have fun with this

hello sigzidfit
nice to see you again you dont need a fan for this, one thing i was thinking of using the fan for is the green house
If you dig a pip under the green house and fill it with broken glass have a small hole for the fan to sit in. In the day(hot day) have the fan push the air down to warm the glass. In the night switch the fan around and pull the heat out of the glass to heat the green house.
take care, is it pj?
Richard

True that Bodkie. Seems like pumping heat would be a most excellent way of using the fan...seems to me if theres any FE in the bedini its in the heat and wind. My plan is to use bedini fans (a couple more tricks ) in a replication of US Patent 5131461.

Thanks Vortex for the info. The Vids were inspiring.

Theres a couple of good guides for running engines on wood gas. Theres one from FEMA and one from the UN...sorry I don't have a link handy. PM me if you need and can't find them.

US Patent 4201058 describes a system where steam is generated utilizing an internal combustion engine driving a heat pump and claims ”A method and apparatus using the combustion of a fuel to generate steam in such a manner that the rate of energy transfer to the water and steam in the apparatus may exceed the rate at which chemical energy is released in the combustion of fuel.”

Anyhoo, in the short term, biogasification seems like low hanging fruit and we should be strapping it to a couple of near unity/OU devices for cogeneration type work.

If two thirds of the energy released into a system by combustion is wasted, recovering half the waste will double the efficiency of the system. If an IC engine is 33% efficient then 66 cents of every dollar spent on fuel is released into the atmosphere as waste heat.

Also see:

US Patent 7401578 - System and method for the co-generation of fuel having a closed-loop energy cycle

US Patent 4065055 - Complete system for a home air heating and cooling, hot and cold water, and electric power

Please note, I'm not saying the patents I reference are the best examples but they do illustrate the overall concept.

Peace
PJ

Wood goes into the inside cylinder to just below the holes.
You lit the fire on the TOP of the wood.
Don't ask me why the thing works.
The heat travels down into the fuel, the fuel out gases, the gas goes out the
bottom of inside cylinder and up between the two cylinders to the holes
at the top of the inside cylinder and burn.
It's a Down Draft Stove .. I don't understand why,
but it's cool stuff watching only gas burn out of the holes.

Yes, Glen that's a good size for cooking.
That design might not work without the FAN that is part of the design.

It kinda hard to find the right size cans for the inside and outside.
That's was part of my problem initially.
I wanted to find a design that I could create any size stove without the need for a fan.

You can get that FEMA wood gas doc here:

Download File page

Great Biochar stuff here:
http://www.energeticforum.com/agriculture/

Make sure to check out Robert Flanagan's stuff.

I had seen a lot of stuff Robert Flanagan had done but was frustrated by
not being able to obtain details about the stoves.

Aaron, I had not seen these postings here.
Sometimes I can not see past the end of my nose.
.. I didn't know it was called biochar or I was paying attention at the time
I was researching for stove information.

After I had built my stove, I saw this video and I'm thinking it might get
over looked if people are only looking for biochar.
BBC - Horizon - The Secret of El Dorado

Besides the biochar, mychorrizal fungus is another part of the secret recipe:
mychorrizal fungus - Google Search

I used both in my garden last year and you should have seen the roots - my sunflower roots were dense like steel wool!!!
I'm doing it again this year because it just plain works miracles!

Yes, I purchased "the fungus" (mycorrhizal) months ago ...
A few days ago I thought I'd try to grow it in some wet coffee grounds with half
a tomato in there too. I'm not sure what I have.. All MOLD or fungus too

Hmmm...I'd dry out the coffee grounds first, then mix with soil.

The mycor fungus I got was actually pre-mixed with coffee grounds.

I bought this one last spring - good mix of the different strains:
Garden Grounds - Home

Prices really came down substantially looks like - I paid over $40 something for the 1 lb bag I believe. More people are learning about this so more companies are sprouting up - looks more than 1/2 the cost of what I paid.

Last spring, I bought bags of charcoal - the kind at garden stores - not the BBQ stuff and used quite a bit...but over the winter - I saved quite a bit of good clean coals left over in the morning from my fireplace insert and threw it on my garden plot so the rain and snow would wash some of carbon into the soil... soon, I'm going to use my tiller and grind it all good into the soil.

Coffee grounds, Hmmm .. So I might have not been too far off in trying to
grow some in coffee grounds?
I got mine at Fungi Perfecti®: gourmet and medicinal mushrooms .. the label states: "Not for human consumption"
Mine kinda looks like coffee grounds, but gray in color.

I have the
I figured .. if it's ok for grass it's ok for garden use

With the improved mining techniques for various forms of natural gas extractions combining gas with wood is a exciting development. As better methods come to pass in this arena. Combination's like this are certain to be the answer to problems.

Should be interesting to see if T. Boone Pickens and his army has any influence with his efforts to get folks off petro fuel and into gas related products. It appears that availability of natural gas futures is very promising

Thought this might be of interest.

Biomass Stove Design | BioEnergy Lists: Biomass Cooking Stoves

Peace
PJ

Here's a night video of my woodgas stover.
It isn't much, I explain below.

I borrowed a camera, took a video at night, the fire is great at night for eye-balls, but bad for a video.
The fire was not burning the best it can..
Dusk is probably the best time for filming.

I move the video to my computer and was going to
take a video during the day. The camera will not turn on.

2 AA reading 2.65 volts .. I'm charging them now.. I hope this is the problem.
else I'm toast .. this isn't my camera.

Randy

Great job Randy
The prognosis of the crisis effects to my country are very bad so this thing could reduce my gas bill
This sure is on my "to build" list
Thanks.