2019 MHA Research Heater Tests

Test MHA-1916
February 21, 2019

Random loading, white birch/oak mix, log cabin stacking, top ignition. Cold firebox, cold fuel
Pieces loaded in order of increasing weight. 2344 stacking.
51.4 lbs including 2 lbs kindling
Estimated moisture 13%.
Run #10 of a cold firebox test series. Heater fired every 2nd day.
The Testo data was started 5 minutes before the test.
lack of space between piece near bottom resulted in bunching and a somewhat slower start.
Charcoal clumping at the end, the pile did not disintegrate as fast.
Air was shut at 90 minutes and there was still 5.56 lbs of charcoal at 210 minutes.
At 7.5 hrs, there was 2.60 lbs of charcoal.

Pisla HTT 602 door, 22" wide
Austrian eco firebox, see http://www.heatkit.com/research/lopez-2014-03-01.html

Condar spreadsheet results at 90 minutes.

Condar Spreadsheet

Testo Raw Data

Lab Notes

Gas graph at 90 minutes.

Testo gas graph to 110 minutes. Only the first 90 minute data was used for the gas calculations, as this is normally when the air would be closed in the Austrian eco-firebox system.

Plot of Condar current draw vs. time. (0.85 g/kg PM for this run)
Gives an indication of real time cumulative PM.
Compare with graph from previous test, below.

Plot from previous test, which was 1.03 g/kg

Burn sequence. Time lapse taken at 2 minute intervals. White square marks 90 minutes.
Notice the clustering of the charcoal at the end, due to tight stacking and lack of air spaces between the pieces.

This page was updated on December 23, 2020
This page was created on February 22, 2019