Test result: New Lao Stove
Water boiling test (WBT)
Stove and fuel
Stove description
Geres, high-moisture charcoal fuel
Stove characteristics
Ceramic-lined, Non-traditional
Fuel type
Charcoal
Fuel description
Charcoal, wet
Fuel moisture content
0.076%
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
100 m
Number of replicate tests
4
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 35.465 g/MJ-del 12.6 0.36
IWA high power PM 743.3 mg/MJ-del 450.0 0.61
IWA low power CO g/min/L
IWA low power PM mg/min/L
IWA efficiency  
Metric Value SD (σ) Cv
IWA low power specific consumption 0.027 MJ/min/L
IWA high power thermal efficiency 23.8% 4.85 0.2
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO g/min
IWA PM mg/min
IWA high power indoor CO 2.95 g/min
IWA high power indoor PM 62.0 mg/min
IWA low power indoor PM 9.0 mg/min
IWA low power indoor CO 0.97 g/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Fuel consumed 95.0 g/task
Cold start thermal efficiency 16.1% 1.4 0.09
Hot start thermal efficiency 31.5% 8.3 0.26
Burning rate cold start 13.3 g/min
Burning rate hot start 14.8 g/min
Burning rate simmer 4.1 g/min
Output
Metric Value SD (σ) Cv
Cold start firepower 6253.0 W 545.0 0.09
Hot start firepower 6946.0 W 499.0 0.07
Simmer firepower 1935.0 W 134.0 0.07
Mean time to boil 23.4 min 2.25 0.1
Emissions
Metric Value SD (σ) Cv
PM2.5 emissions factor (2) 3.32275 g/kg fuel
CO emissions factor (2) 221.55 g/kg fuel
CH4 emissions factor (2) 4.5555 g/kg fuel
PM2.5 emissions rate 30.12856522 mg/min
CO emissions rate 1.96 g/min
Test Conditions Metrics
Metric Value SD (σ) Cv
Local boiling point 99.6 degrees C