HK-H12 - March 3rd, 2007

Notes

• Crib test. Top two layers are 4x4 spruce, 15% moisture, 4 pc per layer. See stacking photos.
• Left side ignition with 3 standard newspaper balls tucked into the recess shown (no room to ignite small kindling at bottom). Similar to "side burn" ignition, except with no kindling.
• Resulted in an interesting "top down" burn.
• Very different burn characteristics from cordwood, particularly CO and PM (see gas and opacity curves)
• Cold heater.
• Regular air - ashbox door closed, air open for whole burn, no changes.
• Opacity normalized to a 1 - 100 scale, referenced to HK-H11.

Animation

Flue Gas

Compare with HK-H10, a normal hardwood run in a cold heater, with the updated opacity system and using the same air. CO/CO2 ratio minimum of 0.0147 at 62 minutes.

Opacity

Compare with HK-H10, a normal hardwood run in a cold heater, using the same air.

Fuel stack

• Newspaper not shown - 4 balls tucked into the recess at lower left. 
• Top two layers are spruce 4"x4"s, spaced 3/4" apart, sitting on 3/4" spacers.
• Detail of bottom layers, below.

Crib detail. First layer is 3/4 x 3/4" spruce, 20% moisture.

Next is a layer of 1.75" x 1.75", spaced 3/4" apart horizontally.
Next layer is 2"x4"s, sitting on 3/4" spacers, and spaced 3/4" apart horizontally. 15% moisture.

Resources

• Excel Data File: testoH-12.xls
• Fueling Excel Data File: fueling-07-HK12.xls