2. Cogeneration Facility
The University of North Carolina at Chapel Hill
Cogeneration Systems
Energy Services Department
Tim Aucoin- Regulatory Compliance Coordinator

4. Overview
Purpose
History
Features
Future

5. Hospital Research Steam for the University
Purpose
Hospital Research Steam for the University

6. Renovated in 1992, this building bears the name of Joshua W. Gore,
                                                                                                   
Joshua Walker Gore ( ) and Gore Building Cogeneration facility
Renovated in 1992, this building bears the name of Joshua W. Gore,
a science and engineering professor at Carolina.

8. 1978

9. 2005

10. 4/26/2017

11. District Energy = E3
Energy
Economics
Environment

12. UNC-CH District Energy

13. Campus Steam Distribution

14. Underground
Steam Tunnel

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

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

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

19. Generator Dispatch

20. Circulating Fluidized Bed Boiler

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

24. Climate Action Plan
UNC was an early adopter of the American College and University Presidents Climate Commitment
Pledged climate neutrality by 2050
Climate Action Plan adopted by University in September 2009
Alternative Energy Study, looked at alternatives to coal, began 2 years before Climate Action Plan issued

25. Biomass Issues Fuel supply chain and cost Front end fuel handling
4/26/2017
Biomass 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

26. Biomass Plan Test protocols – February 2010
Dried wood pellets tests – Spring 2010
Torrified wood tests – Fall to Winter 2010/2011
Evaluation and implementation plan development – 2010/2011
Burn 2012 – Dependent upon fuel supply reliability and extent of required modifications

28. 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