Test result
Water boiling test (WBT)
Stove and fuel
Stove description
Charcoal Stove Skirt (Gyapa). A simple traditional metal grated charcoal stove with added conical skirt surrounding the pot.
Stove characteristics
Pot skirt, Non-traditional
Fuel type
Charcoal
Fuel moisture content
not available
Fuel net calorific value
not available
Test information
Test details
WBT-3.0, 5 Liters Boiled
Testing organization
Reporting type
Not available
Country
United States
Year performed
2010
Test environment
Lab
Altitude
not available
Number of replicate tests
3
Test result IWA tiers of performance
Show subtiers
unrated
Emissions
unrated
Efficiency
unrated
Indoor emissions
unrated
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA high power CO 35.111 g/MJ-del
IWA high power PM 247.129 mg/MJ-del
IWA low power CO 0.286 g/min/L
IWA low power PM 0.394 mg/min/L
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 18.4092015%
IWA low power specific consumption 0.04 MJ/min/L
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 2.315 g/min
IWA PM 26.661 mg/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Specific energy consumption 20800.0 kJ/task
Fuel consumed 657.0 g/task
Hot start thermal efficiency 18.8%
Cold start thermal efficiency 18.0%
Output
Metric Value SD (σ) Cv
Cold start firepower 5790.0 W
Hot start firepower 6735.0 W
Simmer firepower 3174.0 W
Mean time to boil 28.4 min
Emissions
Metric Value SD (σ) Cv
CO emissions factor (2) 390.4041574 g/kg fuel
CO emissions rate 2.315136517 g/min