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Net Zero Study on a Community College

Net Zero Study on a Community College. By: Amanda O’Connell Doenges. My Background. University of Dayton Bachelor’s in Mechanical Engineering Masters in Renewable and Clean Energy Heapy Engineering – LEED & Energy Services Energy Master Plan for Sinclair Community College.

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Net Zero Study on a Community College

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  1. Net Zero Study on a Community College By: Amanda O’Connell Doenges

  2. My Background • University of Dayton • Bachelor’s in Mechanical Engineering • Masters in Renewable and Clean Energy • HeapyEngineering – LEED & Energy Services • Energy Master Plan for Sinclair Community College

  3. Sinclair Pre-2004 • Proactive campus • Facilities department – energy aware • IT development • Added monitors, projectors, etc. to classrooms and offices

  4. What was already done • T12 to T8 lighting retrofits • LED lighting • CRT to LCD computer monitors • De-lamping of exterior lighting • Variable frequency drives to all air and water side systems • Addition of return air to 100% outside air systems

  5. House Bill 251 • 20% energy reduction by 2014 (compared to 2004)

  6. Net-Zero? • HB 251 is a good first goal • Possibility of going beyond 20% reduction • Steps: • Decrease current energy consumption • Renewable Energy

  7. Renewable Energy • Large Flat Roof Areas – Solar PV • 2,200 MWh/year – could produce • Current consumption at 300,000 MWh/year (only electric) • Low Velocity Wind Turbine

  8. Utility Analysis + Benchmarking • Campus Energy Use Intensity: 134 kBtu/sf • Commercial Building Energy Consumption Survey (CBECS) Database: 120 kBtu/sf • Campus density factor? • Average Campus: 250-450 users per 100,000 GSF • Urban Campus: 550-750 users per 100,000 GSF • Sinclair: 970 users per 100,00 GSF •  Using Urban Campus Average = 179 kBtu/sf

  9. Year to Year Comparison • Square Footage • Occupants • Weather (CDD and HDD) • All

  10. Energy Conservation Measures • Daylight Harvesting • Occupancy Sensors • Revise Temperature Set Points to 75F and 70F

  11. Energy Conservation Measures • PC Automatic Shutoff

  12. Energy Conservation Measures • Vending Miser • Exterior Lighting Controls

  13. Energy Conservation Measures • Boiler Retrofits • Very high base load natural gas consumption • Central boilers – DHW and Summer Reheat • Summer Boiler or Heat Recovery Chiller • Boiler Plant Upgrades (Parallel positioning) • 16%+ overall energy reduction through boiler replacements/retrofits

  14. Retro-Commissioning • Identifies operational issues • Original design intent • Lawrence Berkeley National Laboratory Study • 5-15% savings in total building energy use • Commission all new buildings Photo courtesy of CTG Energetics, Inc.

  15. Next Steps • Energy Conservation Measures and Retro-Cx will help to move towards 20%, but will not be Net Zero • Future: • Retro-Commissioning • Energy Metering • Sustainability Coordinator • Education • Renewable Energy

  16. Energy Metering • Meter each building individually • Sub meter large energy consuming processes • Lighting • Ventilation • Heating • Cooling • Plug Loads • ASHRAE Journal – April 2011 – 1-20% savings

  17. Sustainability Coordinator • Individual or a firm • Directly under a President or VP • Position strictly focused on campus energy and/or sustainability • Education to address energy related behavioral changes

  18. Summary • Short Term Energy Savings • Energy Conservation Measures + Retro-Cx • Campus Awareness • Long Term Plan • Capital Improvements • Energy Metering • Sustainability Coordinator • Education • Renewable Energy

  19. Questions? Amanda O’Connell Doenges

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