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Rock Valley College
Karl J. Jacobs Center for Science and Math
February 8, 2011
Dan Comperchio, PEAdam McMillen, PE, LEED® AP, BD+C
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Rock Valley College Karl J. Jacobs Center for Science and Math
Facility Overview
Chilled Beam and Geothermal Application
Systems and Airflows
System Energy Savings
Lessons Learned
Agenda
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Rock Valley Community CollegeKarl J. Jacobs Center for Science and Math
New Construction100,000 Square Feet, Three FloorsSix Life Science Labs, Six Physical Science
Labs, 12 Mathematics Classrooms, Faculty
Offices, Student Life SpacesTargeting LEED Gold Under LEED 2009
Saavedra Gehlhausen ArchitectsDemonica Kemper Architects
Facility Overview
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Daylight and Occupancy Sensors
Multiple Switching Zones
Building Integrated Photovoltaic Modules
Energy Saving Technologies
Energy Saving Technologies at Rock Valley Community College:Geothermal Field
Water Cooled Heat Pumps
Chilled Beam Cooling
Variable Air Volume Air Handling Units
Energy Recovery on Air Handling Units
Thermally Efficient Glazing
White Membrane Roof With R-27 Insulation Value
Geothermal Domestic Water Heating System
Variable Frequency Drives
High Efficiency Lighting Fixtures, Low Mercury Lamps
Transformers Bearing Energy Star Label
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Project Energy Grants
Illinois Clean Energy Community Foundation (Geothermal) - $90,000
Illinois Clean Energy Community Foundation (Building Integrated PV) - $115,000
Illinois Clean Energy Community Foundation (LEED Gold) - $150,000
Illinois Dept of Commerce and Economic Opportunity (Geothermal) - $420,000 ARRA funding - 26% of geothermal installation cost
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Earth absorbs 50% of all solar energy
Heat is stored in the earth
Remains a constant temperature below the frost line
Uses constant temperature to exchange energy between your building and the earth
Geothermal Systems: The Basics
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System Applications at Rock Valley College
164 vertical well bores
370’ deep
420 tons cooling capacity
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Geothermal Field Location
Geothermal Field
New Facility
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Geothermal Field Installation
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Geothermal Field Installation
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Geothermal Field Installation
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Chilled Beam System
Chilled beams were used to handle sensible load
Dedicated Outdoor Air System (DOAS) provided ventilation air and all latent capacity
Saved over 45% of airflow using chilled beams and DOAS over traditional VAV
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Chilled Beam System
Utilized chilled beams in over 60% of spaces
Areas without chilled beams included:
Mechanical/Electrical Rooms Select Corridors Restrooms, Janitor Closets Lab Spaces with high ACH
requirements Greenhouse
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Chilled Beam/DOAS VAV
Ground Floor Layout
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First Floor Layout
Chilled Beam/DOAS VAV
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DOAS Unit
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DOAS Psychometrics
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Humidity Control
Aggressive humidity control at DOAS
Dewpoint sensors in areas of concern
Zone control valves close when dewpoint rises above the setpoint
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Chilled Water Loop
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Energy Results
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LEED Implications
Optimize Energy: pursing 19 points
Enhanced Refrigerant Management: pursuing 2 points
Indoor Chemical and Pollutant Source Control:
eligible with November 2010 addenda
Controllability of Systems – Thermal Comfort:
pursuing 1 point
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Lessons Learned
Many buildings require a hybrid system approach to best meet the building needs
Primary airflow requirements can vary widely based on latent load
Dry supply air can significantly reduce air handler unit size and potentially reduce first cost
Consider demand control ventilation for additional fan energy savings
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Questions?
Thank YouKJWW Engineering
1100 East Warrenville RoadNaperville, Illinois 60563
630-527-2320Dan Comperchio, PE ([email protected])
Adam McMillen, PE, LEED® AP, BD+C ([email protected])