Test result: Kenya Uhai
Water boiling test (WBT)
Stove and fuel
Stove
Stove description
Kenya Uhai, charcoal fuel (Wet)
Stove characteristics
Ceramic-lined, Non-traditional
Fuel type
Charcoal
Fuel description
Charcoal, wet
Fuel moisture content
0.075%
Fuel net calorific value
28.2 MJ/kg
Test information
Test details
WBT 4.1.2, 5 Liters of water
Testing organization
Reporting type
Third party
Country
United States
Year performed
2012
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 low power CO 0.092 g/min/L
IWA low power PM 0.58 mg/min/L
IWA high power CO 18.25 g/MJ-del 6.65 0.36
IWA high power PM 319.5 mg/MJ-del 290.0 0.91
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 29.1% 1.8 0.06
IWA low power specific consumption 0.016 MJ/min/L
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 0.89 g/min
IWA PM 12.2 mg/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Fuel consumed 69.0 g/task
Cold start thermal efficiency 25.6% 1.2 0.05
Hot start thermal efficiency 32.5% 2.4 0.07
Output
Metric Value SD (σ) Cv
Cold start firepower 3334.0 W 475.0 0.14
Hot start firepower 4556.0 W 595.0 0.13
Mean time to boil 31.1 min 2.65 0.09
Simmer firepower 1144.0 W 73.0 0.06
Emissions
Metric Value SD (σ) Cv
PM2.5 emissions factor (2) 1.84 g/kg fuel
CO emissions factor (2) 170.425 g/kg fuel
CH4 emissions factor (2) 4.2654 g/kg fuel
PM2.5 emissions rate 9.948393951 mg/min
CO emissions rate 0.89 g/min