The fine dust and ash plugging issue is really obvious when you run gasifiers with identical fuel, nozzles, and engines but with different physical dimensions.
Because there is so much space for the ash and dust to go, this updraft 55 gallon drum gasifier will run a generator at 1kw for 10 hours, unattended (with one air/fuel adjustment after warm up).
This 16 gallon updraft unit, with the same fuel, nozzle, and engine, will start to plug up after three hours. Simply less space for junk to fill.
