Hi Wood Gassers,
Lately I have been posting about the wonderful heat transfer you can get off a cyclone. I bet someone is going to come up with the brilliant idea to make a REALLY tall cyclone to cool and filter the gas in one step, avoiding building a radiator. DON’T!! Been there, tried that. I made a 48 inch tall cyclone so I would have lots of heat transfer surface. The filtering was dismal. The problem was that the flow could spread out and slow down so much going around the first spin that all the centrifugal force was lost and the particles could shoot up to the exit pipe. Live and learn.
Stick with a height of 2.5 to 3 diameters.
Hopefully this saves someone some aggravation and money.