About updraft devices was RE: Ratio of primary to secondary air in a ND TLUD?

Hey guys!!

Tried bottom lit updraft?   Of course.   Stimulated to do this by Agua Das back around 2003-2004.

And my successful results were published in Boiling Point back in 2007   Microgasification: What it is and why it works  [2007]     and have
been available at my websites since then.

It is the AVUD part of that article (not TLUD).    (and the “A” now means Anderson.)

That was 16 years ago, and 10 years before the 2017 article that Dean brought to our attention (below).   You will notice the great similarity between the diagrams in my article and  the 2017 item.   

MAIN difference is the ability of AVUD to produce biochar, as was shown in about 2010 when the AVUD design was used in the Chip  Energy Biomass Furnace, the product of an  SBIR grant from the US EPA.   Worked well, but not (yet) a commercial
success.  
www.chipenergy.com/pdf/Biomass-Furnace.pdf  

About updraft and cookstoves.   My AVUD unit can be quite small, even for cooking.   But it is not viable, in my opinion, because it operates on the basis of trickle-in fuel.   The would be manual
for a stove (too much attention  to fuel input, even worse than attending to a Rocket Stove, or if automated, too expensive to operationalize for a household, especially if an impoverished household.

Perhaps this message will save someone from reinventing a wheel.