Test result: Natural Draft Top Lit Up Draft Stove (TLUD)
Water boiling test (WBT)
Stove and fuel
Stove characteristics
Non-traditional, Household, Portable, Batch loaded, Biochar-producing, Gasifier (TLUD), Prototype
Fuel type
Wood
Fuel description
Douglas Fir Pellets
Fuel moisture content
not available
Fuel net calorific value
18.627 MJ/kg
Test information
Test details
WBT 4.3.2
Testing organization
Reporting type
Self reported
Country
United States
Year performed
2014
Test environment
Lab
Altitude
196 m
Number of replicate tests
6
Source information
Citation
not available
Source data
private
Test result IWA tiers of performance
Show subtiers
4
Emissions
3
Efficiency
3
Indoor emissions
unrated
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA high power CO 0.14 g/MJ-del 0.04 0.29
IWA high power PM 24.9 mg/MJ-del 18.0 0.72
IWA low power CO 0.01 g/min/L 0.0 0.0
IWA low power PM 0.23 mg/min/L 0.15 0.65
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 45.6% 3.0 0.07
IWA low power specific consumption 0.018 MJ/min/L 0.002 0.11
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 0.06 g/min 0.01 0.17
IWA PM 3.4 mg/min 2.2 0.65
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Hot start thermal efficiency 46.24% 8.06 0.17
Cold start thermal efficiency 45.43% 2.37 0.05
Simmer thermal efficiency 42.0% 0.034 0.0
Specific fuel consumption cold start 48.19 g/L 2.33 0.05
Specific fuel consumption hot start 48.39 g/L 1.997 0.04
Temp-corrected specific consumption cold start 44.49 g/L 2.32 0.05
Temp-corrected specific consumption hot start 44.15 g/L 2.69 0.06
Temp-corrected specific energy cons cold start 828.97 kJ/L 51.99 0.06
Temp-corrected specific energy cons hot start 835.82 kJ/L 75.99 0.09
Burning rate cold start 15.037 g/min 1.877 0.12
Burning rate hot start 15.502 g/min 1.236 0.08
Burning rate simmer 5.979 g/min 0.681 0.11
Output
Metric Value SD (σ) Cv
Cold start firepower 4816.0 W 439.0 0.09
Hot start firepower 4749.0 W 734.0 0.15
Simmer firepower 1853.0 W 189.0 0.1
Time to boil cold start 21.29 min 0.95 0.04
Time to boil hot start 22.0 min 1.41 0.06
Temp-corrected time to boil cold start 19.65 min 0.81 0.04
Temp-corrected time to boil hot start 20.05 min 0.89 0.04
Turn down ratio 2.616 0.524 0.2