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Transcript of Charter Street Heating Plant: The What, The How, And The Why Matt Pomerleau Feb. 21, 2011 Biological...
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Charter Street Heating Plant:The What, The How, And The Why
Matt PomerleauFeb. 21, 2011
Biological Systems Engineering (Natural Resources and Environmental Engineering Specialization), Certificate in Engineering for Energy Sustainability
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Outline
Plant Timeline Coal Natural Gas Biomass WI Energy Use Why Decision Was Made Future Outlook
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Timeline
2007 - Sierra Club challenged the State of Wisconsin over pollution emissions
2008 – WI Governor Jim Doyle announces that plant will be replaced with cleaner system
2009 – $250 million plan decided upon, scheduled to be completed 2013
November 2010 – Governor-elect Scott Walker writes Doyle Administration with intention to alter plan
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Walker to Doyle
“Media reports indicate that natural gas actually scored the highest overall when judged on environmental, economic, and reliability grounds. Because Wisconsin can both save money and still meet environmental benchmarks, I ask that the Doyle Administration begin making plans to shift to natural gas rather than bio-fuel at the Charter Street Power Plant.”
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Emissions Data
CO2 Emissions: 83,241 tons (2006)
SO2 Emissions: 1,347 tons (2002)
SO2 Emissions per MWh: 58.46 lb/MWh
NOx Emissions: 764 tons (2002) Mercury Emissions: (not provided) Particulate Matter Emissions: (not provided)
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Original Plan
Replace four boilers with three new ones Installation of biomass boiler
Able to burn up to 250,000 tons/yr Two new gas and ultra-low sulfur distillate
fired package boilers to replace existing coal fired units
Backup generator that runs on fuel oil Plant efficiency expected to improve 5-10%
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Plant Additions
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Plant Conversion Projections
Biomass/Natural Gas Lower pollutant emissions Generate WI jobs keep money in state $250 million cost
Natural Gas Lower pollutant emissions Save $100 million
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Coal (who’s got it?)
Recoverable Reserves Annual Production
World Top Ten (million tons)
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Coal (who’s got it?)
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Coal Mining Methods
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Mountain Topping
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Natural Gas
Natural gas combustion produces almost 45 percent fewer carbon dioxide emissions than coal, emits lower levels of nitrogen oxides and particulates, and produces virtually no sulfur dioxide and mercury emissions
Natural gas is still a fossil fuel Roughly 85% of natural gas is produced in
the U.S. 87% of imports are from Canada 0% of natural gas is produced in Wisconsin
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Natural Gas Pipeline
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Natural Gas Costs
Consist of four main components: Production Transmission Distribution Commodity price as determined by the
marketplace
The interstate and intrastate pipeline infrastructure can only transport so much natural gas at any one time, and in essence provides a 'ceiling' for the amount of natural gas that can reach the market.
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Price Fluctuation
(Years vs. Dollars/m^3)
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Biomass (Why?)
Two Current Energy Concerns: Shortage of Primary Energy Supplies Environmental Effects: Global Warming
Energy of the Future? Biomass could reduce reliance on fossil fuels
as well as reduce pollution emissions
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Requirements for Crop Production
Water Nutrients/Soil
Fertility CO2 Temperature
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Future Goals
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Biomass (Why Not?)
Food crops and biofuels compete for the same resource inputs (soil, water, nutrients)
Even in areas with naturally fertile soil, nutrients are generally added in large quantities to maintain high levels
Requires Large Areas Because Inefficient (0.3%) Ultimately we don’t fully understand the environmental
impacts on a quantitative level due to high variability
Energy Returned on Energy Invested Fossil fuels can range from 5:1 to 100:1 Corn approaching 1:1 (widely debated)
Sustainability? Resources used for renewable energy may not
themselves be renewable
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Energy Density
Land Uses Food Production Living Space Recreation Biodiversity
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Soil Erosion
• 600 m/my = 0.6 mm/year average
• On average, about 1500 years to remove 1 m of soil
• O horizon typically approximately 2’ deep
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Soil Runoff
Gulf of Mexico Dead Zone
Eutrophication = runaway algal productivity due to influx of excess nutrients
Primary nutrient source is nitrogen runoff from Mississippi river, derived from corn fertilizer
Fish and other marine life die due to oxygen depletion as algae decay
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Water Use
Water Consumption for Energy Extraction
U.S. D.O.E. (2006)
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Energy Pricing
0
2
4
6
8
10
12
14
16
Fuel Prices (DOE, 2010)
Coal Natural Gas Wood Pellets Corn
Fuel Type
Fuel P
rice P
er
Million B
tu (
dollars
)
Fuel Type Fuel UnitFuel Price Per Unit (dollars)
Fuel Heat Content Per Unit (Btu)
Fuel Price Per Million Btu (dollars)
Coal (Anthracite) Ton 200 25000000 8.00Natural Gas Therm 1.05 100000 10.54
Pellets Ton 250 16500000 15.15Corn Ton 200 16500000 12.12
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U.S. Energy Use
(DOE, 2009)
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Wisconsin Energy Use
Wisconsin Electricity Generation
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Future Projections(Shell Oil)
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Wisconsin’s Energy Deficit
Wisconsin has NO fossil fuels Wisconsin spends over $20 billion on
imported fossil fuel energy (approximately 10% of Gross State Product)
Jobs go elsewhere Fossil fuel dependency = price
volatility
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Why Change the Plan?
$100 million dollars saved Alternative plan meets emission
regulation WI budget deficit
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Future Outlook
Short term Avoid picking winners/losers Level playing field to see what develops Continue to invest in the future of
energy Long term
Energy externalities will be introduced (carbon taxing, land degradation, etc.)
Large scale processes will improve Biomass energy production will
increase, but by no means will it generate the majority of energy
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My Belief
Natural gas replacing coal is a good short term solution until renewable energy develops on a larger scale
Despite being more expensive, original plant plan could have proved to be a worthy investment
Wisconsin has fertile soil with high productivity in both agriculture and forestry as well as a reputation for research at UW-Madison
Using biomass would utilize what Wisconsin can produce on its own instead of looking for resources elsewhere
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Questions?
References
http://www.theboldtcompany.com/press_releases/http://www.sourcewatch.org/index.php?title=Charter_Street_Heating_Plant#Emissions_Datahttp://www.sourcewatch.org/index.php?title=Coal_plant_conversion_projecthttp://www.news.wisc.edu/16755www.eia.doe.gov/neic/experts/heatcalc.xlshttp://www.eia.doe.gov/pub/oil_gas/natural_gas/analysis_publications/ngpipeline/TransportationCorridors.htmlhttps://fpm-http://www.nrel.gov/gis/biomass.htmlhttp://soils.usda.gov/use/worldsoils/mapindex/ http://www.eia.doe.gov/cneaf/alternate/page/renew_energy_consump/rea_prereport.htmlhttp://psc.wi.gov/utilityInfo/gas/index-naturalGas.htm