Ken Skog, Project LeaderUSDA Forest Service
Forest Products LaboratoryMadison, Wisconsin
Using TPO and DOE/EIA surveys
to track wood biomass/ bioenergy –
How can we improve methods?
Biomass/ Bioenergy Workshop Houston, TX
February 25, 2010
Background Forest Service provides some wood energy source estimates
– Fuelwood production– Primary mill residue use for fuel
DOE/EIA provides wood energy end use estimates– Electric power– Industrial, residential, commercial, transportation
A lot is missing– Intermediate wood fuels (pellets, liquid fuels potentially)– Sources of fuel used for DOE end use categories– Why don’t source estimates match end use estimates?
What steps could improve estimates?
What should we track? – traditional TPO & wood biomass for bioenergy
For the timber market –
– Which wood sources are consumed – NG/NGS, HW/SW [same for wood for bioenegy?]
– What is consumed by key industries
• Industrial roundwood (several categories),
• Fuelwood
• Expand Fuelwood category?
– Roundwood for residential fuelwood
– Roundwood/ chips for pellets
– Roundwood/ chips for other energy users For primary product markets (sawmills, panels, pulp/paper)
– What residues are produced/ who consumes
– Expand residue fuel uses?
• Pellets
• Wood for bioenergy – electric power or combined heat / power
• Wood for bioenergy - other
Forest
Growing stock (FIA)Non GS (FIA)
Industrial wood source
Primary mill residue (TPO)-- Wood-- Bark
Secondary mill residue-- Wood-- Bark
Other ??
Wood fuels
CharcoalResidential pelletsCommercial pellets
Pyrolysis oilLiquid fuels
Primary products
Industrial roundwood (TPO)
Fuelwood (TPO)
Urban wood waste - construction, demolition
Exported wood fuels
Wood energy sources, intermediate products, and end uses
Short rotation woody crops
End Uses (DOE)
Stand alone electric power-- Pulp & paper-- Wood mills
-- OtherCombined heat and power
-- Pulp & paper-- Wood mills
-- OtherThermal energy
--Industrial-- Residential--Commercial
-- Other ?Transportation
Other ?
Wood energy sources, intermediate products, and end uses – 2006
Possible revised TPO wood energy categories (forest wood sources)
Roundwood for residential fuelwood Roundwood/ chips for other energy users Roundwood for pellets
Wood energy sources, intermediate products, and end uses – 2006
Should we expand primary wood residue USES? PelletsWood for bioenergy – electric power or combined heat / powerWood for bioenergy - other
Should we survey pellet mill wood SOURCES?Should we survey secondary mill residue USES?
Wood energy sources, intermediate products, and end uses – 2006
Could a survey of pellet mills determine uses including exports?
Wood energy sources, intermediate products, and end uses – 2006
How will uses of short rotation woody crops be determined? Part of TPO studies?
Wood energy sources, intermediate products, and end uses – 2006
Should FS & DOE work to reconcile wood energy estimates?
For 2006 DOE ~129 million dtUSFS ~109 million dt
Wood energy sources, intermediate products, and end uses – 2006
DOE vs FS
Summary of suggestions to improve tracking of wood energy sources and uses Expand Timber product output categories to include
– Roundwood for residential fuelwood
– Roundwood/ chips for other energy users
– Roundwood for pellets Expand primary wood residue USES
– Pellets
– Wood for bioenergy – electric power or combined heat / power
– Wood for bioenergy – other Survey pellet mill wood SOURCES & pellet USES/ exports Survey secondary mill residue USES?
Are short rotation woody crops uses part of TPO studies? Should FS or DOE attempt to reconcile differing estimates?