Wood/Biomass Gasifier? Answered
I have always been interested in the principles behind gasification, but I have had some problems fully understanding it due to some differences in the devices I have seen. I have noticed two real differences which I can only describe as closed and open systems. Closed systems have some heat source which heats a closed container of wood, this wood is directly fed to an engine or flame. No air can enter and their is no combustion prior to reaching a torch or the engine. The open systems I have found to be more common but I can't really grasp how they work. The fuel source is lit and then the smoke is captured, but this captured smoke is then somehow flammable. I just find it difficult to understand how this can work in an open air-fed system. Does anyone have more details on the differences between these two styles?