ARC E-Newsletter 9/4/25: Lowering Emissions in a Short, Natural Draft TLUD
Aprovecho Research Center
Lowering Emissions in a Short, Natural Draft TLUD
The great thing about 12” high tincanium natural draft TLUDs is that they are cheap, short and powerful. Dr. Tom Reed had a dream that a billion TLUDs would protect health, save wood, etc. We wondered if an all Tier 4, affordable, stainless steel ND-TLUD might help?
The first step was to test the baseline ND-TLUD. It’s great for camping outdoors but not close to Tier 4 for PM2.5, CO and Thermal Efficiency. We are now trying three ways to achieve all Tier 4:
- A nothing fancy prototype. Control primary and secondary air and don’t let flames touch the bottom of the pot.
- A static mixer prototype.
- A better concentrator ring prototype.
Usually when we make one change a day in a prototype and test the effects under the emission hood it takes about a month to get close to an “optimal” solution. Doing one iteration a day leaves us time to do all the other work here at the lab.
Looking forward to sharing test results!
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