White birch, large pieces, 21% moisture, large load 79.1 lbs
8 pieces, 4.5 lbs kindling
Cold fuel, stacked in warm firebox for 90 minutes. Warm heater (24 hrs)
Animation, 2 minute intervals.
Somewhat slow start. Kindling was stacked a little tight, so fire tunnelled through the newspaper to the back right away.
Ashbox door was accidentally left closed with 50% air, AB door opened at 12 minutes.
Ashbox door was closed at 32 minutes. (air control full open), evidenced by stack temperature (red curve) drop.
Also a huge, short, CO (yellow curve) spike.
Bells were closed to start, opened at 40 minutes. They add about 2% in efficiency. If the bells were openend permanently, stack would
take longer to get up to temperature - it is unclear at this point whether that would increase emissions on the start, and needs further
Big dip in oxygen (blue) curve at 90 minutes is when fuel pile collapses.
TESTO Excel data file
The spike at 32 minutes is when air is cut back (ashbox door closed).
With a very large fuel load such as this, it may be advantageous to delay closing the door to 350F.
Condar Spreadsheet Results
Condar Spreadsheet (includes detailed fueling data)
Graphical data comparison of Condar tests
This page was updated on
January 17, 2008
This page was created on January 16, 2008