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Published byLola Herrel Modified over 10 years ago
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NET ZERO STUDY ON A COMMUNITY COLLEGE By: Amanda OConnell Doenges
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My Background University of Dayton Bachelors 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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Sinclair Pre-2004 Proactive campus Facilities department – energy aware IT development Added monitors, projectors, etc. to classrooms and offices
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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
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House Bill 251 20% energy reduction by 2014 (compared to 2004)
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Net-Zero? HB 251 is a good first goal Possibility of going beyond 20% reduction Steps: Decrease current energy consumption Renewable Energy
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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
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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
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Year to Year Comparison Square Footage Occupants Weather (CDD and HDD) All
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Energy Conservation Measures Daylight Harvesting Occupancy Sensors Revise Temperature Set Points to 75F and 70F
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Energy Conservation Measures PC Automatic Shutoff
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Energy Conservation Measures Vending Miser Exterior Lighting Controls
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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
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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.
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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
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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
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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
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Summary Short Term Energy Savings Energy Conservation Measures + Retro-Cx Campus Awareness Long Term Plan Capital Improvements Energy Metering Sustainability Coordinator Education Renewable Energy
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Amanda OConnell Doenges Questions?
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