Team GeoMELT
description
Transcript of Team GeoMELT
05.08.2010
TEAM GEOMELT
The Team
Jacob Speelman
(ME)
Caleb Rottman (EE)
RICO Ledy (ME)
Eric Geerlings
(CE)
OutlineProject Introduction
Goals Site Assessment Design Norms
Final Design Snowmelt Geothermal Pumphouse Model
Project CostConclusionsAcknowledgementsQuestions
Project Introduction
Lake-effect snow can lead to severe storms, but Calvin never cancels class!
Michigan receives ≈ 72 inches of snow annually
http://www.duluthstreams.org/understanding/lake_effect.html
Intro Snowmelt Geothermal Pump House Model Project
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Project IntroductionProblems with the Burton St. Entrance to
CalvinWhy not use Geothermal energy to melt
snow?
http://www.bing.com/maps
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Introduction - GoalsPrimary Goal: Design a geothermal
snowmelt system at Calvin’s Burton Street Entrance
Secondary Goal: Design a small scale model
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Introduction - Design NormsStewardship
Save on energy and reduce fossil fuel useCaring
Increase safety for pedestrians and vehiclesTransparency
Honest recommendation
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Introduction – Site AnalysisAssess the existing site
Where to place the geothermal field?How much pavement should we melt?What obstacles do we have to work around?
Large trees?Pipes?Fiber Optic Lines?
http://www.bing.com/maps
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Introduction – Site AnalysisExisting Infrastructure
Pavement/Curb linesWatermainGas mainStorm SewerFiber Optic Line
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How it works
Snowmelt 101Results you get!
Pipes buried in concrete
Slip free surfacesNo need to shovel/plow
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Snowmelt 101Using the software program EES for
Thermodynamics
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Snowmelt 101Temperature drives heat transfer!
55 °F waterIce formation
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Snowmelt Design4,000 ft2 to melt at 150 BTU/hr- ft2 60 tons ≈ 20 times the heat load of a
house2 Manifolds are used to distribute heat
to the snowmelt area
http://www.bing.com/maps
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Snowmelt Design – Pipe Layout• 1” PEX pipe
•500’ length loops
•9” on center pipe spacing
•3” from concrete surface
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Geothermal Energy 101Ground temperature over a year at
varying depths
Kavanaugh, Stephen P., and Kevin Rafferty. Ground-Source Heat Pumps. Atlanta: ASHRAE, 1997. 125-26. Print.
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Geothermal Energy 101Pump fluid through buried pipes to extract
energy
http://focusedthinking.files.wordpress.com/2009/04/geothermal_heat_pump.jpg
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Geothermal Energy 101
Heat In Heat Out
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Residual Temperature EffectsBalanced systems
Geothermal DesignHorizontal vs. Vertical
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Geothermal DesignCalculated the total bore length required:
9375 ftWhich is approximately 1.75 miles
Limit each bore depth to 390 ftPipe diameter – 1 ¼”
http://img.directindustry.com/images_di/photo-g/well-drilling-rig-354735.jpg
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Geothermal Design24 Well Locations
Adequate well spacing3 rectangular manifoldsDesign avoids tree
removal!Pumphouse hidden from
view
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Heat Pumps 101
Condenser
Evaporator
From Geothermal Loops
To Snowmelt Loops
Q
Q
Compressor
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Valve
Heat PumpsEntering temperature of
105 °FExiting temperature of 90
°F
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Pump House Design Plan View
Isometric View
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Model DesignConcrete with
installed piping and moisture sensor
InsulationSand Sub-baseSoil with installed
vertical geothermal loop
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Model Control System
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Project CostGeothermal Snowmelt System Cost
Breakdown
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Project Cost Comparison
Payback Period: 55 years
Geothermal System
Natural Gas System
Initial Cost $420,000 $180,000Operating Cost
$6,600 $10,900
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Conclusions
Payback Period: 55 yearsOur recommendation: Don’t do it!
Geothermal System
Natural Gas System
Initial Cost $420,000 $180,000Operating Cost
$6,600 $10,900
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ConclusionsWhat else did we learn?
Teamwork on a multidisciplinary projectDefining project goals early on is importantHave Fun!
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AcknowledgementsTrent DeBoer, GMB EngineeringSteve Schultz, GMB EngineeringCharles Huizinga, Calvin College Physical
PlantMarc Huizinga, Calvin College Physical PlantProfessor Nielsen, Team AdvisorRen Tubergen, Gumbo Product
Development, Inc.Bob Bruggink, Moore & Bruggink, Inc.
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QUESTIONS…Please ask !