Transcript West Virginia Division of Energy, Energy Efficiency

West Virginia Division of Energy,
Energy Efficiency Activities:
Woody Biomass
Shawn Grushecky
Assistant Director
WVU Appalachian Hardwood Center
West Virginia’s Forest Resource
• West Virginia is the third
most forested state
• Forests cover ~12 million
acres (78 % of land area)
• 88% of the forest resource
is privately owned
• Growth to removal (harvest)
averages 1.7 : 1
• Oak species account for
48% of removals
Growing Stock Removals
Wood Residues
Wood Residues
Primary
Logging
Residues
Fuel
Treatment
Secondary
Tree
Trimming
(Source: Perlack et al. 2005)
Tertiary
Primary
Secondary Pulping
Urban
wood
wood
liquors
wood
processing
processing
(black
residues
mill residues mill residues liquor)
Types of Woody Byproducts
Logging Residues (Tons/Acre)
Logging Residue Totals for 2006
Primary Mill Residues - 2007
Primary Mill Residues : 2005-2007
Annual Wood Residue Production
• Total 2.41 million dry tons (~5
million green tons) of residue per
year.
• 1.34 million dry tons of logging
residue, 55%.
• 941,888 dry tons of mill residue
(39%).
Urban trees,
118,590, 5%
Pallet
residue,
12,716, 1%
Mill residue,
941,868, 39%
Logging
residue,
1,340,000,
55%
– 40,000+ green tons weekly
– 80% from sawmills and 20% from
secondary manufacturers
– 50% of chips, 30% of sawdust,
and 20% of bark
• Urban tree and pallet residues,
6%
• Equivalent to 4.813 Btu - ~25% of
the electricity used in WV
households
Mount Wachusett Community College
Gardner, MA
•
•
•
•
•
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Closed loop, two pipe hydronic
heating system, ~$4 million invested
8M Btu combustion unit
During 2003/2004 heating season,
saved Mt. Wachusett approximately
$275,000
Also have installed 50kw downdraft
gasifier
Produces electricity for buildings via
production of syngas from woodchips
Syngas is then combusted in a Honda
generator to produce electricity
In Summary
•
We are actively partnering with the WV Division of Energy to encourage the
increased use of woody biomass – which WV clearly has an abundant supply.
•
Although complete recovery of woody residues may not be feasible, they
represent an economic resource that has been largely ignored in WV.
•
More emphasis needs to be placed on the efficient recovery of these materials in a
sustainable fashion.
•
Opportunities definitely exist for new industries to develop around this resource
that will benefit the people and the communities of the Appalachian region.
•
Important for WV to promote the use of our natural resources not only for the
production of traditional forest products, but also for liquid fuels, electricity, heat
and process steam, as well chemical feedstocks, syngas, and its use in coal
liquefaction, among others…