Design and use of TLUD's is counter-intuitive to say the least.
--Rather than lighting a match to the bottom of the pile, the pile must be started on top.
--If the process is smoky, you REDUCE the process air going into the pile.
Proficiency in getting them started and adding fuel takes some experience. But in terms of efficient conversion of biomass to useful products their performance is at or very near the top among the latest world stove designs.
They offer a highly carbon negative footprint. Because they can be tuned to work with many locally obtainable biomass residues, there is no need to transport or store expensive fossil fuels. The co-product of the heat is biochar, a new-old technology that enhances crops while interring carbon in the soil long-term.
Enough banter, lets get to it.
Although tincanium and obtainium are practical when testing designs, stainless vessels offer better radiant heat properties and long term durability.
This design begins with a 2 liter vacuum insulated serving pitcher. Depending upon the number of holes and fuel quality (drier and denser is better), it finishes with a stove that boils a quart of water in 10 minutes and keeps it boiling for half an hour on a half load - one pound - of hardwood pellets.
Step 1: Remove the bottom cover.
Keep moving around the diameter, take it a little at a time, until the base releases completely from the vessel.
The same procedure works for removing the top cap.