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Because the
<br />pulpwood
<br />harvest is
<br />currently used
<br />to produce pulp
<br />and paper
<br />products, not all
<br />of this resource
<br />Table 2. Three Sources of Available Wood (values in green tons)
<br />is economically available for bioenergy.
<br />However, additional biomass is available
<br />from forest thinning, particularly those
<br />conducted for ecosystem restoration, which
<br />is not included in this assessment (Condon
<br />and Putz 2007).
<br />Supply Curve Construction
<br />Given information regarding cost, quantity,
<br />and distribution of all three types of woody
<br />biomass, supply curves can be generated for
<br />Buncombe and Orange counties.
<br />Figure 2 shows the price of wood at
<br />different quantities needed. The y -axis
<br />represents price per MMBtu of energy and
<br />the x -axis represents the total amount of
<br />wood available in 15- minute increments.
<br />Several scales are provided to translate the
<br />quantity of wood into tons, energy content,
<br />and houses electrified. Biomass sources
<br />include urban wood waste, logging residues,
<br />and pulpwood within a one -hour haul radius
<br />of both county centers.
<br />Table 3. Delivered Cost of Available Wood
<br />Supply
<br />Analysis
<br />Results
<br />Energy
<br />resources
<br />and costs for
<br />each
<br />resource -haul time category for the two
<br />counties are shown in Table 3 (resources are
<br />ranked from cheapest to most expensive
<br />based on delivered cost of energy). These
<br />values were used to construct the supply
<br />curves shown in Figure 2. The supply curves
<br />suggest that 2.0 and 3.9 trillion Btu, or 17
<br />and 33 MW of electricity, which is enough
<br />to power 6,800 and 13,300 households
<br />(Bellemar 2003), are available for less than
<br />$2.60 per MMBtu in the Buncombe and
<br />Orange County woodsheds, respectively.
<br />Energy at this cost is competitive with
<br />current costs of coal.
<br />Within a one -hour haul radius, up to 0.5 and
<br />1.4 trillion Btu can be provided from urban
<br />wood waste alone in Buncombe and Orange
<br />County woodsheds, respectively. With the
<br />addition of logging residues, 2.0 and 3.9
<br />trillion Btu can be produced in the
<br />Buncombe and Orange County woodsheds,
<br />respectively. Other types of wood may be
<br />Available
<br />Available
<br />Resource/Haul time category
<br />(in minutes)
<br />Buncombe County
<br />urban
<br />logging
<br />Harvested
<br />County
<br />wood waste
<br />residues
<br />pulpwood
<br />Buncombe
<br />26,700
<br />20,100
<br />900
<br />Orange
<br />14,400
<br />22,700
<br />6,400
<br />is economically available for bioenergy.
<br />However, additional biomass is available
<br />from forest thinning, particularly those
<br />conducted for ecosystem restoration, which
<br />is not included in this assessment (Condon
<br />and Putz 2007).
<br />Supply Curve Construction
<br />Given information regarding cost, quantity,
<br />and distribution of all three types of woody
<br />biomass, supply curves can be generated for
<br />Buncombe and Orange counties.
<br />Figure 2 shows the price of wood at
<br />different quantities needed. The y -axis
<br />represents price per MMBtu of energy and
<br />the x -axis represents the total amount of
<br />wood available in 15- minute increments.
<br />Several scales are provided to translate the
<br />quantity of wood into tons, energy content,
<br />and houses electrified. Biomass sources
<br />include urban wood waste, logging residues,
<br />and pulpwood within a one -hour haul radius
<br />of both county centers.
<br />Table 3. Delivered Cost of Available Wood
<br />Supply
<br />Analysis
<br />Results
<br />Energy
<br />resources
<br />and costs for
<br />each
<br />resource -haul time category for the two
<br />counties are shown in Table 3 (resources are
<br />ranked from cheapest to most expensive
<br />based on delivered cost of energy). These
<br />values were used to construct the supply
<br />curves shown in Figure 2. The supply curves
<br />suggest that 2.0 and 3.9 trillion Btu, or 17
<br />and 33 MW of electricity, which is enough
<br />to power 6,800 and 13,300 households
<br />(Bellemar 2003), are available for less than
<br />$2.60 per MMBtu in the Buncombe and
<br />Orange County woodsheds, respectively.
<br />Energy at this cost is competitive with
<br />current costs of coal.
<br />Within a one -hour haul radius, up to 0.5 and
<br />1.4 trillion Btu can be provided from urban
<br />wood waste alone in Buncombe and Orange
<br />County woodsheds, respectively. With the
<br />addition of logging residues, 2.0 and 3.9
<br />trillion Btu can be produced in the
<br />Buncombe and Orange County woodsheds,
<br />respectively. Other types of wood may be
<br />11
<br />Trillion Btu available per year
<br />within a one -hour haul radius
<br />Delivered cost
<br />($ /MMBtu),
<br />Resource/Haul time category
<br />(in minutes)
<br />Buncombe County
<br />Orange County
<br />$0.65
<br />Urban wood: 0 -15
<br />0.04
<br />0.04
<br />$0.85
<br />Urban wood: 15 -30
<br />0.13
<br />0.27
<br />$1.05
<br />Urban wood: 30 -45
<br />0.15
<br />0.46
<br />$1.25
<br />Urban wood: 45 -60
<br />0.17
<br />0.67
<br />$2.03
<br />Logging residues: 0 -15
<br />0.03
<br />0.07
<br />$2.21
<br />Logging residues: 15 -30
<br />0.15
<br />0.38
<br />$2.39
<br />Logging residues: 30 -45
<br />0.48
<br />0.79
<br />$2.56
<br />Pulpwood: 0 -15
<br />0.00
<br />0.02
<br />$2.57
<br />Logging residues: 45 -60
<br />0.83
<br />1.17
<br />$2.72
<br />Pulpwood: 15 -30
<br />0.07
<br />0.18
<br />$2.88
<br />Pulpwood: 30 -45
<br />0.58
<br />0.50
<br />$3.04
<br />Pulpwood: 45 -60
<br />1.05
<br />0.82
<br />11
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