a lot was going on in a few days. Again I’m very impressed by your building speed!
Your model really looks quite compact, but should be large enough compared to other charcoal gasifiers.
My thoughts to wetting the charcoal and the auger:
It should be moist and not wet. If its too wet, water may collect at the bottom of the hopper and flood the gasifier. This could lead to lighting problems.
Also, if the char is too wet the dust will tend to stick together in corners, and it could cause a kind of bridging, especially where it should fall through the hopper constiction.
The auger: How do you will control the speed of it? I’m afraid the it could grind down the char to dust if it is on permanently or with too high speeds.
Don asked about clinker. I think the same as Kristijan. First, water or steam should cool down the reaction zone so that no clinker or just very little is formed. Ash an clinker move down with the consumed char to the grate. Here it can be ground with grate motion.
In the Swedish book it is written about the Mako gasifier, that it required little maintenance. As this gasifier here is very similar, we can be optimistic.
Clinker formation on the grate was also a big problem with steam locomotives. In late advanced locos, so called “clinker control steam” was introduced in the ashpan to cool the grate and the ashes/clinker on the grate. It also made the clinker more crumbly.
In a charcoal gasifier, the “sweet spot” with steam addition will give a reaction temp of 800 to 1000 degree Celsius. At this temp, not much clinker will form.