Thank you Mike. Here is one more right away.
DOWing home from work today I felt I wanted to share my thinking on turndown ratio in relation to the Imbert specs.
As you’all know by now I run 2 nozzle planes. Five pretruding nozzles 4" above the restriction and 10 more, pretty flush to the firetube, a couple of inches higher. The air inlet to those 10 nozzles can be closed separately.
Now, the total csa of the lower 5 nozzle tips is about half of what’s recomended in the chart to go with my 4" restriction, while running all 15 is 50% more.
Running only the lower 5 nozzles keeps the air velocity and thereby the heat up at idle but vacuum climbs fast when rpm increases and the nozzles start acting restrictive.
Running all 15 nozzles makes the volume of gases passing the restriction increase to the point where the actual restriction becomes the most restrictive part, not letting vacuum enough through to the hopper (nozzles) to even maintain the vacuum ratio.
So, in order to be able to squeeze yet another hp or two outof this system I think I will go for Kristijan’s initial suggestion and step up another half inch on the restriction diameter as soon as time and weather allows.
And yes, I know, this may be where I hit the full circle and the next gasifier will be a WK
Anyway, this is today’s video.