Happy New Year folks, hope you all have a lovely day....
Here is a process I have been working on the last couple weeks, been hard as it was so warm, but so far it has been working. Not 100% convinced it will work every time but so far I have had good luck. I tried to make it as prescriptive as it needed to be and included other temps and times to gage consistency. As always I welcome any comments or suggestions....
One thing I have been doing differently lately is making sure I have a healthy bed of hot coals to reload onto. If I do not have a good bed I add a few small splits to make one. Before I reload I rake the coals evenly or a bit more towards the front of the stove.
Hot re-loads (decent bed of coals, bypass damper closed)
Initial Conditions: STT = 350-400, Flue = 365, Cat = <600
1) Open air to 100% to heat the cat back up
- wait 10-15 min or peak cat temp
2) Open bypass damper, Air = 100%
- Rake coals evenly (or more towards the front)
- Load wood
- Wait for flue gas temp to reach 650F (10-15 min)
3) Close bypass damper, Air =100%
- Wait for cat temp >= 1000F (~15 min)
- STT=425-450, Flue = 520-550
4) Close air down to 60%
- Wait for Cat = 1200 (~5 min)
- STT=410-425, flue = 550-600
5) Close air down to desired setting, (10-50% air)
Here is a plot from yesterday using the process. I am pretty happy with it.
- It was a full load of ash/oak, med splits.
- After turning the air down to 20% no adjustments were made.
- Late burn cat temps were a bit high but I am happy with short spikes that stay under 1500.
- Burn time was about 14 hours with a decent bed of coals left to easily light the next load.
- Glass was 80% smoked but burned off some of it when I opened the air up for the next load.
- I did notice some wispy smoke from the stack a couple times when cat temps were >1000F but the thermocouple in the exhaust looked pretty clean, dry and slightly brownish (not black), so I think the burn was pretty clean overall.
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