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HK-H13 - March 4th, 2007

Notes
  • Crib test. Top two layers are 4x4 spruce, 18% moisture, 4 pc per layer. See stacking photos for HK-H12
  • Left side ignition with 6 half-sheet newspaper balls tucked into the recess shown (no room to ignite
    small kindling at bottom). Similar to "side burn" ignition, except with no kindling.
  • Somewhat faster start and less "top down" effect than yesterday, due to warmer start.
  • Very different burn characteristics from cordwood, particularly CO and PM (see gas and opacity curves)
  • Very consistent with HK-H12, considering the warmer start.
  • Bottom layers are dryer -- 13% instead of 20%. This is evidenced in a faster start, also helped by warmer firebox.
  • Regular air - ashbox door closed, air open for whole burn, no changes
  • Opacity normalized to a 1 - 100 scale, referenced to HK-H11
Animation

Anim-H13.gif

Flue Gas

gas-HK-H13.gif

Compare with HK-H12, an identical run with a cold heater, and 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 .0085 occurs at 51 minutes.

Opacity

opacity-HK-H13.gif

Compare with HK-H12, an identical run with a cold heater, and with HK-H14, a normal run of
60 lb of hardwood in a warm heater.

Fuel stack

H13-01.jpg

Top two layers are spruce 4"x4"s, spaced 3/4" apart, sitting on 3/4" spacers. For bottom layer details, see HK-H12.

07040401.jpg

Newspaper detail.

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