Ok I built the stainless jet and ran the first test run tonight. I got a weight on the charcoal as well, a 5 gallon pale came to 7.5 lbs not including the weight the bucket. So total hopper load weight is 15 lbs.
I got around a 2 hour and 50 minute run. It consumed the full water tank and ran @ 2 kW for the first two hours. However after that it just would not pull that load so reduced it down to 1.5 kW for the remaining 50 minutes. Combustion zone is dead center however I suspect the reduced char depth is the cause for why it would not pull as strong as before. So not going to change anything yet and run again. If this repeats then Im going to chop 2 inches off.
So tonights run averaged 2.7 lbs per net kW / Hour
The other day with the 3 hour run with a net 6.9 kW/hr net output. If I use this wieght the average weigth per kW/hr is actually a bit more than prevously calculated. About 2.2 lbs per kW/hr. That is still very good though. The last time I weighed the fuel I was using that slat wood and that was a mix of different woods so more likely it was softer woods giving a lighter weight.
Here is tonights run.
