NET ZERO STUDY ON A COMMUNITY COLLEGE By: Amanda OConnell Doenges.
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Transcript of NET ZERO STUDY ON A COMMUNITY COLLEGE By: Amanda OConnell Doenges.
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NET ZERO STUDY ON A COMMUNITY COLLEGE
By: Amanda O’Connell Doenges
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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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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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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
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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 O’Connell Doenges
Questions?