Preheat intake air

[Chris (Chris Saenz)]

Good discussion here:

How much inlet air preheat is really necessary?

I am starting to plan for a light weight wood gasifier with a ceramic insulated firetube on the order of Dustin Moore and Paul McCombie’s units. I want it to be easily disassembled but the hard part is connecting the air preheat to the nozzles in a small space (I need to keep the overall dimensions down). My question is this. Did anyone ever do a study on how much preheat is necessary before you come to a point of diminishing return? On my charcoal gasifiers there is no preheat at all and they w…