Calefaccion A Pellet

Ultra-low Emissions, European-style Wood and Biomass Combustion Technology

Gasification and Staged Combustion - a path to lower emissions, higher efficiency and increased market success

RaymondJ. Albrecht, P.E. Buildings Research NYSERDA Albany, NY

Firewood and wood pellets account for 25 percent of heating energy in Austria

BLT is the leading independent certification lab in Europefor biomassfired heating systems

Improved Energy and Environmental Performance Of Wood and Biomass-fired Heating Systems in Austria

Decreasing emissions Increasing CO2 in exhaust (less excesscombustion air)

Wood and Biomass Emissions Standards and Actual Performance in Austria

Note: 10 mg/MJ is approximately 0.02 lb/MMBtu

Total Annual Emissions from Small Wood and BiomassCombustion in Lower Austria

Note: Average PM values have continued to decrease with time

Improved Energy and Environmental Performance Of Small Wood and Biomass-fired Heating Systems in AustriaIncreasing efficiency

Sales of Wood and Biomass Boilers in Lower Austria

Key Components of Clean Wood Combustion

Gasification with 20 to 40 percent of total air flow to primary combustionchamber Maintain approximately 1200 degrees F Low air velocity to minimize fly ash

Key Components of Clean Wood Combustion

Pre-heated secondary combustion air and insulated secondary combustionchamber Significant residence time in secondary combustion chamber

Key Components of Clean Wood Combustion

Forced combustion air supply

Oxygen sensor

Key Components of Clean WoodCombustion

Large water volume in boiler or secondary storage tank

Key Components of Clean Wood Combustion

Electrostatic filter-separator

Wood gasification-type boiler imported from Denmark Noemissions data directly available but European version (with electronic air fuel ratio control) shows clean combustion performance

KWB Wood NOx CO PM 0.08 10 to 60 0.01

American Oil-fired 0.10...