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Optimization of a wood-waste fuelled, indirectly-fired gas turbine cogeneration plant for sawmill applications Zaradic, Andrea Melissa
Abstract
Forests are a primary natural resource in the province of British Columbia. Harvested trees are delivered to sawmills which produce lumber for domestic and export markets, wood chips for the pulp and paper industry and large volumes of wood waste. Traditionally, wood waste has been disposed of by open incineration. The government of British Columbia has mandated that by 1996, all forms of open burning must be eliminated. In the past this form of biomass waste had very limited economic value due to its limited application and use. The most common use for forest residues was in pulp and paper mills where it was utilized as a fuel for steam boilers for generating both heat and electricity. Until recently, very little incentive existed for manufacturers of wood wastes to generate electricity and/or heat due to the very low electricity and natural gas prices. This scenario is beginning to change due to increased environmental standards. Cogeneration with wood waste, i.e. the simultaneous production of heat and electricity, is proposed as a viable alternative for supplying the heat and power requirements of a sawmill. Cogeneration has been utilized in the past, in the pulp and paper sector, but has had very limited application in the sawmill industry. In analyzing the application of a cogeneration system the amount of heat and power to be produced must be determined. In some cases, the system is sized to match the electrical power requirements, while in other cases it is sized to meet the thermal requirements. In order to achieve the best economic return from the system, both heat and power must be produced accordingly. These amounts are not intuitively obvious and an optimization technique known as linear programming has been incorporated in this analysis to determine the optimum production levels of heat and power. In general it was found that cash flow was maximized when the cogeneration system was sized to meet the thermal requirements of the sawmill. Production of electricity was not particularly attractive due to low electricity rates. The overall conclusions indicate that cogeneration is an economically attractive option for disposing of wood wastes for those sawmills which require large amounts of process heat, typically in the range of 20,000 kW (68 MMBtu/hr).
Item Metadata
Title |
Optimization of a wood-waste fuelled, indirectly-fired gas turbine cogeneration plant for sawmill applications
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1994
|
Description |
Forests are a primary natural resource in the province of
British Columbia. Harvested trees are delivered to sawmills which
produce lumber for domestic and export markets, wood chips for the
pulp and paper industry and large volumes of wood waste.
Traditionally, wood waste has been disposed of by open
incineration. The government of British Columbia has mandated that
by 1996, all forms of open burning must be eliminated.
In the past this form of biomass waste had very limited
economic value due to its limited application and use. The most
common use for forest residues was in pulp and paper mills where it
was utilized as a fuel for steam boilers for generating both heat
and electricity.
Until recently, very little incentive existed for
manufacturers of wood wastes to generate electricity and/or heat
due to the very low electricity and natural gas prices. This
scenario is beginning to change due to increased environmental
standards.
Cogeneration with wood waste, i.e. the simultaneous production
of heat and electricity, is proposed as a viable alternative for
supplying the heat and power requirements of a sawmill.
Cogeneration has been utilized in the past, in the pulp and paper
sector, but has had very limited application in the sawmill
industry.
In analyzing the application of a cogeneration system the
amount of heat and power to be produced must be determined. In
some cases, the system is sized to match the electrical power
requirements, while in other cases it is sized to meet the thermal requirements. In order to achieve the best economic return from
the system, both heat and power must be produced accordingly.
These amounts are not intuitively obvious and an optimization
technique known as linear programming has been incorporated in this
analysis to determine the optimum production levels of heat and
power.
In general it was found that cash flow was maximized when the
cogeneration system was sized to meet the thermal requirements of
the sawmill. Production of electricity was not particularly
attractive due to low electricity rates.
The overall conclusions indicate that cogeneration is an
economically attractive option for disposing of wood wastes for
those sawmills which require large amounts of process heat,
typically in the range of 20,000 kW (68 MMBtu/hr).
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Extent |
4103211 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-06
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0081035
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1994-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.