mulciber stove testing summary. testing overview six sampling periods o warm-startup – 5 min....
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Testing Overview Six Sampling Periodso Warm-Startup – 5 min. after loading for 15 min.
o Warm-Steady State – 50 min. after loading for 30 min.
o Hot-Startup – 5 min. after loading for 15 min.
o Hot-Steady State – 50 min. after loading for 30 min.
o Wet-Startup – 5 min. after loading for 15 min.oNo Dilution Tunnel Particulates
o Wet-Steady State – 50 min. after loading for 30 min.oNo Dilution Tunnel ParticulatesoNo Testo Data
Testing MethodsTESTO
g/m3
g/hr (Estimated)
PPM (CO)
Efficiency (Estimated)
DILUTION TUNNEL
g/hr
PPM (CO) ◦ In the Dilution Tunnel, not the Stack
Caveats1. None of these are official test methods;
we aren’t claiming an EPA test
2. No tests were run constantly, we only have snapshots of data
3. Our burn rate was approximately 3.3 kg/hr
4. Our fan pulls in fresh air to cool itself1. Air is diluted by 1/3 (Approximately 15%
Oxygen instead of a more typical 10% in all tests)
2. This impacts PPM and g/m3
3. This does not change grams per hour
Particulates (g/m3 and g/hr)
NOTE: TESTO AND DILUTION TUNNEL APPEAR TO BE COMPARABLE DURING STEADY STATE, BUT NOT DURING START UP.
THEORY: THE TESTO DOES NOT CAPTURE UNBURNED HYDROCARBONS. IF THIS IS THE CASE, UNBURNED HYDROCARBONS MAKE UP A SUBSTANTIAL PORTION OF PARTICULATES DURING START UP.
Efficiency
Thermal efficiency estimated based upon heat released and heat lost
E=1- (Heat Exhausted/Heat Produced)
Category ivNON-CATALYTIC STOVE
MAXIMUM BURN RATE
RUN # 1 2 3 AVERAGE
Date 19-May 20-May 21-May
Particulate Emissions Units
Concentration mg/m^3 6.933 6.747 7.037 6.905
Emissions Rate grams/hr 4.291 4.159 4.355 4.268
Emissions Factor grams/kg 1.399 1.422 1.269 1.363
Total Mass Captured mg 8.300 8.050 7.200 7.850
Fuel Burn Rates
Average Burn Rate
kg/hr (dry) 2.46 2.33 2.57 2.45
lb/hr (dry) 5.43 5.13 5.67 5.41
Fuel Weight and Burn Time
Density (dry basis) gm/cm^3 N/A N/A N/A N/A
Coal Bed Weight lbs 6.3 5.6 5.1 5.7
Pre Test Fuel (inc. kindling) lbs 28.8 22.5 28.3 26.5
Test Fuel lbs 24.4 23.9 24.2 24.2
Burn Time min 213.92 219.92 190.42 208.1* Sampled in dilution tunnel
1 2 3 4 5 6 7 8 9 10 11 12
Analyzer 1
528.95
793.35
760.725
1558 152.475
79.6875
1923.95
26466.687
5
2058 7960.875
1240 15307.6
Analyzer 2
742.0125
582.9 270.825
1705 37.2 526.4 4331 10750.4
2910.375
10852.05
13066.2
707.35
2500
7500
12500
17500
22500
27500
CO Emissions from 2013 Wood Stove Design Challenge
Stove
CO (p
pm)
*15 minute snap shot of steady state sampled directly in stack, not representative of entire burn
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