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Cogeneration Facility

Cogeneration Facility. The University of North Carolina at Chapel Hill Cogeneration Systems Energy Services Department Phil Barner- Cogeneration Systems Manager Ray DuBose – Director, Energy Services. Joshua Walker Gore (1852-1908) and Gore Building at Cogeneration Facility

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Cogeneration Facility

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  1. Cogeneration Facility The University of North Carolina at Chapel Hill Cogeneration Systems Energy Services Department Phil Barner- Cogeneration Systems Manager Ray DuBose – Director, Energy Services

  2. Joshua Walker Gore (1852-1908) and Gore Building at Cogeneration Facility This building bears the name of Joshua W. Gore, a science and engineering professor at Carolina.

  3. 1978

  4. 2005

  5. District Energy System

  6. Campus Steam Distribution

  7. Cogeneration or CHP( Combined Heat and Power ) • Simultaneous production of electricity and steam • High thermal efficiency • Low environmental impact

  8. U.S. Average Generating Efficiencies 100% 80% UNC Cogen • 60% 40% 20% 0%

  9. UNC-CH Cogeneration Air Boilers Water Coal Turbine Steam Generator 150 psi 40 psi Electricity Heating Cooling Hot Water Sterilization Cooking/Dishwashing Condenser

  10. Generator Dispatch Total UNC Load Price Duke Purchased kW UNC Generated kW

  11. Circulating Fluidized Bed Combustion Clean coal technology Nitrogen Oxides (NOx) -- furnace temperature Sulfur dioxide (SO2) -- sorbent

  12. NSPS 40CFR60, Subpart Db Typical Operation Permit Limits • SO2 • 90% reduction • 1.2 lbs/MMBtu • NOx • 0.6 lbs/MMBtu • Opacity • 20% • Particulate • 0.5 lbs/MMBtu • SO2 • 92% reduction • 0.2 lbs/MMBtu • NOx • 0.4 lbs/MMBtu • Opacity • 3% • Particulate • 0.01 lbs/MMBtu

  13. New Boiler MACT Permit Typical Operation Permit Limits • Mercury • 0.000 003 lbs/MMBtu • HCl • 435 lb/hr • Mercury • 0.000 000 75 lbs/MMBtu • HCl • 4.4 lbs/hr

  14. UNC Cogen CFB System

  15. Prologue to the Future:UNC Climate Action Plan and Cogen • Climate Action Plan Published September 2009 • Two Cogen Projects over next 5 years: • Landfill Gas to Energy • Biomass Co-firing at Cogen

  16. Cogen and UNC’s Climate Action Plan Near Term Impact

  17. PROPOSED LANDFILL GAS PIPE ROUTING

  18. PROJECT BENEFITS • Reduction in greenhouse gas emissions • Methane destruction • The emissions reduction attributable to this project are equivalent to: • Removing the emissions of 7,860 automobiles or • Planting 9,750 acres of forest

  19. PROJECT BENEFITS • Cost savings from avoided purchased power • Makes beneficial use of otherwise wasted gas • LFG project alone would make Carolina North carbon neutral for 12 to 15 years.

  20. Biomass Cofiring in CFBs: Issues • Fuel Supply Chain and Cost • Front End Fuel Handling • Storage • Feed Systems • Impact on Combustion and Heat Transfer Surface • Baghouse Impacts • Ash Disposal Impacts • Amount of Carbon Reduction

  21. Biomass Cofiring in CFBs: Plans • Test Protocols – March 2010 • Dried Wood Pellets Tests – Spring 2010 • Torrified Wood Tests – Fall to Winter 2010/2011 • Evaluation and Implementation Plan Development – 2010/2011 • Burn 2012 - ? (Fuel Supply Chain and Extent of Required Mods)

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