Test result: Small Natural Draft Sunken Pot Rocket Stove
Water boiling test (WBT)
Stove and fuel
Stove characteristics
Household, Portable, Rocket, Chimney, Sunken pot, Prototype, Non-traditional, Pot skirt
Fuel type
Wood
Fuel description
2x1x40 cm Douglas Fir Sticks
Fuel moisture content
not available
Fuel net calorific value
19.314 MJ/kg
Test information
Test details
WBT 4.2.3
Testing organization
Reporting type
Self reported
Country
United States
Year performed
2014
Test environment
Lab
Altitude
196 m
Number of replicate tests
4
Source information
Citation
not available
Source data
Test result IWA tiers of performance
Show subtiers
3
Emissions
3
Efficiency
4
Indoor emissions
unrated
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA high power CO 2.22 g/MJ-del 0.85 0.38
IWA high power PM 152.2 mg/MJ-del 81.1 0.53
IWA low power CO 0.05 g/min/L 0.02 0.4
IWA low power PM 1.73 mg/min/L 1.0 0.58
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 49.7% 2.2 0.04
IWA low power specific consumption 0.02 MJ/min/L 0.004 0.2
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Simmer thermal efficiency 14.0% 5.0 0.36
Specific fuel consumption cold start 58.09 g/L 1.05 0.02
Temp-corrected specific consumption cold start 53.3 g/L 3.18 0.06
Temp-corrected specific energy cons cold start 1029.37 kJ/L 61.47 0.06
Burning rate cold start 8.24 g/min 0.81 0.1
Burning rate simmer 4.56 g/min 0.89 0.2
Output
Metric Value SD (σ) Cv
Cold start firepower 2652.71 W 261.29 0.1
Simmer firepower 1467.58 W 285.93 0.19
Time to boil cold start 33.25 min 3.59 0.11
Temp-corrected time to boil cold start 30.53 min 4.1 0.13
Turn down ratio 1.89 0.55 0.29