Test result: Kenya Uhai
Water boiling test (WBT)
Stove and fuel
Stove
Stove description
Kenya Uhai, charcoal fuel (Dry)
Stove characteristics
Ceramic-lined, Non-traditional
Fuel type
Charcoal
Fuel description
Charcoal, dry
Fuel moisture content
0.054%
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
0
Emissions
2
Efficiency
0
Indoor emissions
unrated
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA low power CO 0.094 g/min/L
IWA low power PM 0.242 mg/min/L
IWA high power CO 24.75 g/MJ-del 5.35 0.22
IWA high power PM 308.5 mg/MJ-del 25.0 0.08
IWA efficiency  
Metric Value SD (σ) Cv
IWA low power specific consumption 0.018 MJ/min/L
IWA high power thermal efficiency 30.1% 1.45 0.05
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 1.162 g/min
IWA PM 11.022 mg/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Fuel consumed 67.0 g/task
Cold start thermal efficiency 27.1% 1.4 0.05
Hot start thermal efficiency 33.1% 1.5 0.05
Output
Metric Value SD (σ) Cv
Cold start firepower 3332.0 W 393.0 0.12
Hot start firepower 5073.0 W 55.0 0.01
Simmer firepower 1246.0 W 117.0 0.09
Mean time to boil 28.3 min 1.95 0.07
Emissions
Metric Value SD (σ) Cv
PM2.5 emissions factor (2) 1.48 g/kg fuel
CO emissions factor (2) 194.325 g/kg fuel
CH4 emissions factor (2) 7.29625 g/kg fuel
PM2.5 emissions rate 8.567248645 mg/min
CO emissions rate 1.162 g/min