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Actually TLUD stoves would create char coal and burn the pyrolysis gases, now they are just wasted. The article is low on detail, here is a free ebook about stoves and their use in 3rd world countries:

http://www.biochar-international.org/sites/default/files/Understanding-Stoves-okt-10-webversion.pdf

and a slide show that explains the principle:

http://www.bme.gouv.ht/ugse/TCharbon%20Kara%20Grant%20-%20English.pdf

I haven't seen this mentioned in the article which is somewhat thin on detail, but there is way more to stoves than the article explains. Also Burn Design Lab doesn't explicitly mention the TLUD design.

Oh, here is another website:

http://stoves.bioenergylists.org/

Somehow the UW related stuff is free of the TLUD principle, I wonder why. Also, you are wrong.

Come up with a cheaper, simpler, more efficient woodgas design
Stoves Camp 2010 is July 26-30
is coming up.
To start playing all you need is aluminum foil

Come up with a cheaper, simpler, more efficient woodgas design
Stoves Camp 2010 is July 26-30
is coming up.
To start playing all you need is aluminum foil

Not true. Making biochar is energy positive and can be done in a ways that produce useful gas or liquid fuels. The solar energy input to plant photosynthesis is the energy source and incomplete oxidation still releases energy. You can keep up with the subject here: http://terrapreta.bioenergylists.org/

They're converting dumped organic material into H2, CO2 and some leftovers, using electricity input.

The folks around Markus Antonietti (Max Planck society for colloid chemistry, Potsdam)
(see e.g. http://www.bioenergylists.org/en/maxphydtherm)
use a simple catalytic process which also extracts H2 from organic material, using no microbes, no electricity, but just tiny amounts of e.g. citric acid as catalyst; and the best is, they even get thermal energy out of the process.

The net balance just feels slightly better...

The Stoves BioEnergy Discussion List (web site http://www.bioenergylists.org/) is a really great resource if you are interested in the global effort to build better, cheaper, low tech cooking stoves. Appropriate technology isn't dead, it's thriving in a lot of these areas where there are limited resources, and not a lot of press coverage. This is My favorite Darfur stove: http://www.bioenergylists.org/en/taxonomy/term/909 It can be built in the refugee camp instead of shipped there, and it can easily be modified to handle charcoal. Fuel flexibility is important when there are limited resources.

The Stoves BioEnergy Discussion List (web site http://www.bioenergylists.org/) is a really great resource if you are interested in the global effort to build better, cheaper, low tech cooking stoves. Appropriate technology isn't dead, it's thriving in a lot of these areas where there are limited resources, and not a lot of press coverage. This is My favorite Darfur stove: http://www.bioenergylists.org/en/taxonomy/term/909 It can be built in the refugee camp instead of shipped there, and it can easily be modified to handle charcoal. Fuel flexibility is important when there are limited resources.