My Summer Project: Measuring Chilled Water Needs for Winter Cooling on Campus
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Transcript of My Summer Project: Measuring Chilled Water Needs for Winter Cooling on Campus
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My Summer Project:Measuring Chilled Water Needs for
Winter Cooling on Campus
By Scott Womer, Engineering InternCollege of Engineering, Class of ‘15
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My Odyssey al La PlantEngineering InternCompost HaulerTechnology Trash Recycler
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Winter Cooling Summer Project IdeaBuildings on campus attached to chilled water require winter cooling.
As of now most use air and domestic water for cooling.
Is there a way we can use our chilled water to more effectively provide this cooling
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Join the Physical plant, go exotic places find interesting equipment and record the information
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Coolers/Cold Rooms Server Rooms
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Growth Chambers Freezer Rooms
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Have all the info but how are we going to quantify the loads and chilled water required? …(stay with me, here’s where it gets “science-y”)
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Energy Produced HIGH HEAT
LOW HEAT
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Reverse…Cool Mike and Take heatHIGH HEAT
LOW HEAT
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Cool in Different WaysAir Cooled Water Cooled
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Heat Conduction Difference
Air Conduction = .025 Water = .563
Water 25 times better than “conducting” heat than air
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Quantify? Total Thermal Energy = Thermal Loss * Amount of Stuff Losing it
Q = (Tin – Tout) *(Gallon/min)(500)
Temperature DROP & GPM
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I got to use a……Temperature…Laser
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then I’m asked to…“Find out how fast the flow goes?”
• Use a Flow Meter (best and easiest method)
• Manual (“a pail and a stopwatch”)
• Guess (using standards and equipment specs)
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When there were no flow meters…Liters/Second GPMLiters Per Second converted into Gallons Per Minute
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….but then people wondered what the student intern was doing in the closet all day….
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Organized the Information in Shared folder
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…and massive Excel file
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Chilled Water GPM• GPM for known loads already entered
into spreadsheet.
• All information and equations are ready for when the unknown GPM is known
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Auto-Cad Cooling Details
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Major Opportunity and Solution Example
Davis Center Jeffords Hall
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Davis Center
Proper Controls Set in place
Rooftop Condenser to Outside Air
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Davis GPM & Temperature Trending
Trending of GPM and Temp show maximum and minimum demands on loop
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Davis Center resultsGPM of Food Loop MAX = 22
Max Temperature Drop = 12 F
Max HEAT = 121,000 BTU/hr
GPM Required Chilled Water = 15.37
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More Buildings Ready and More to Come
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MUCH Thanks to these PPD staff:Mike Pelletier Russ Charron
Dave Blatchly Scott O’Brien
Matt Malloy Randall Reynolds
Erica Spiegel Corey Berman
Former Intern: Shaun Connelly