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2010 Heater Fuel Crib Tests at Shawville

Test HK-L10
January 24/10

Series 2: Test #2 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 16.1% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 26.6 lb crib (16.56 % av moisture) + reload w. 24.6 lb crib (15.60% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

Condar Spreadsheet Results
Condar Spreadsheet Results

Condar Spreadsheet (includes detailed fueling data)

Compared to HK-L09:

- load was 6% (3.2 lbs) heavier
- kindling slightly slower, more left to ignite crib
- first crib burned slightly faster
- an error was made on the second crib, and it was loaded upside down. This meant that it had
spacers underneath, whereas normally the crib has been loaded directly onto the coal. This allowed
more air under, resulting in a faster start, and a higher CO spike than L-08. Also, the piece-to-piece
moisture matching with crib one from HK-L08 was lost.

The batch of 2x4's used for the last 4 tests has been very variable in moisture, both piece to piece,
adjacent pieces cut out of the same stick, and particularly from the surface to the core. A more
detailed description of the matching technique used will follow. A third back-to-back test from the same
batch is planned for tomorrow (Jan 25) and Jan 26. Obtaining more uniform fuel will be the next

Animation, 2 minute intervals.

gas analysis
Flue gas.

Testo graph L10
Graph from Testo analyzer. 30 second sampling intervals.
The green line tracks the CO/CO2 ratio.

TESTO Excel data file


fuel load
First crib.

Detailed crib moisture statistics. The bottom 2 cribs were used for this test.

Burn sequence L09
Burn sequence.

This page was updated on February 8, 2010
This page was created on January 24, 2010