Test result: Malena
Water boiling test (WBT)
Stove and fuel
Stove
Stove characteristics
Non-traditional, Household, Built in place, Rocket, Chimney, Sunken pot, Side-feed
Fuel type
Wood
Fuel description
Eucalyptus
Fuel moisture content
not available
Fuel net calorific value
18430.0 MJ/kg
Test information
Test details
not available
Testing organization
Reporting type
Self reported
Country
Bolivia
Year performed
2015
Test environment
Lab
Altitude
3434 m
Number of replicate tests
4
Source information
Citation
not available
Source data
Test result IWA tiers of performance
Show subtiers
1
Emissions
2
Efficiency
4
Indoor emissions
3
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA high power CO 12.17 g/MJ-del 1.29 0.11
IWA high power PM 61.1 mg/MJ-del 3.65 0.06
IWA low power CO 0.06 g/min/L 0.02 0.33
IWA low power PM 0.3 mg/min/L 0.07 0.23
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 0.25% 0.02 0.08
IWA low power specific consumption 0.03 MJ/min/L 0.01 0.33
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 0.12 g/min 0.02 0.17
IWA PM 0.6 mg/min 0.06 0.1
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Hot start thermal efficiency 0.28% 0.02 0.07
Cold start thermal efficiency 0.22% 0.01 0.05
Simmer thermal efficiency 0.21% 0.03 0.14
Specific fuel consumption cold start 89.01 g/L 5.14 0.06
Specific fuel consumption hot start 64.81 g/L 8.0 0.12
Temp-corrected specific consumption cold start 93.18 g/L 4.73 0.05
Temp-corrected specific consumption hot start 71.01 g/L 4.87 0.07
Temp-corrected specific energy cons cold start 1717.34 kJ/L 87.21 0.05
Temp-corrected specific energy cons hot start 1308.63 kJ/L 89.83 0.07
Burning rate cold start 21.88 g/min 2.14 0.1
Burning rate hot start 22.74 g/min 1.33 0.06
Burning rate simmer 13.75 g/min 4.49 0.33
Specific fuel consumption simmer 95.49 g/L 9.38 0.1
Temp-corrected specific energy cons simmer 1759.95 kJ/L 172.82 0.1
Output
Metric Value SD (σ) Cv
Cold start firepower 6722.02 W 657.48 0.1
Hot start firepower 6984.07 W 407.52 0.06
Simmer firepower 4223.74 W 1377.87 0.33
Time to boil cold start 30.5 min 4.12 0.14
Time to boil hot start 20.75 min 2.22 0.11
Temp-corrected time to boil cold start 31.95 min 4.41 0.14
Temp-corrected time to boil hot start 22.78 min 1.88 0.08
Turn down ratio 1.849 1.06 0.57
Safety metrics
Metric Value SD (σ) Cv
Total safety score 90.5 points
Flames or fuel exiting chamber rating 4.0
Flames surrounding cookpot rating 4.0
Chimney shielding rating 2.0
Temperature of operational construction rating 3.0
Heat transmission to surroundings rating 4.0
Surface temperature rating 4.0
Obstructions near cooking surface rating 4.0
Containment of fuel rating 3.0
Cookstove tipping rating 4.0
Sharp edges and points rating 4.0