05.08.2010 TEAM GEOMELT. The Team Jacob Speelman (ME) Caleb Rottman (EE) RICO Ledy (ME) Eric...
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Transcript of 05.08.2010 TEAM GEOMELT. The Team Jacob Speelman (ME) Caleb Rottman (EE) RICO Ledy (ME) Eric...
![Page 1: 05.08.2010 TEAM GEOMELT. The Team Jacob Speelman (ME) Caleb Rottman (EE) RICO Ledy (ME) Eric Geerlings (CE)](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649d0b5503460f949de77f/html5/thumbnails/1.jpg)
05.08.2010
TEAM GEOMELT
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The Team
Jacob Speelman
(ME)
Caleb Rottman (EE)
RICO Ledy (ME)
Eric Geerlings
(CE)
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OutlineProject OverviewMajor Design DecisionsDesign
SnowmeltGeothermalSite DevelopmentModel
ConclusionsQuestions
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Project OverviewProblems with the Burton St. Entrance to
CalvinWhy not use Geothermal energy?
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Overview - GoalsPrimary Goal: Design a geothermal
snowmelt system at Calvin’s Burton Street Entrance
Secondary Goal: Design a small scale model
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Overview - Design NormsStewardship
Save on energy and reduce fossil fuel useCaring
Increase safety for pedestrians and vehiclesTransparency
Honest recommendation
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Major Design DecisionsSnowmelt
What surfaces to meltIs a heat pump required?
GeothermalHorizontal vs. Vertical
Site DesignPumphouse locationPiping and manifold layout
ModelComponent selection
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Snowmelt Design - Overview4,000 ft2 to melt at 150 BTU/hr- ft2 60 tons – About 20 times that of a
houseManifolds are used to distribute heat
to the snowmelt area
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Snowmelt Design – Pipe Layout
• 1” PEX pipe
•500’ length loops
•9” on center pipe spacing
•3” from concrete surface
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Condenser
Evaporator
From Geothermal Loops
To Snowmelt Loops
Q
Q
Compressor
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Snowmelt Design – Heat PumpEntering temperature of
105 °FExiting temperature of 90
°F
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Geothermal DesignFirst Major Step in the Geothermal Design:
Pipe layout: Horizontal or VerticalAdvantage/Disadvantage Analysis
Design Choice: Vertical Loop
Cooling ground over time?
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Geothermal DesignCalculated the total bore length required: 9375
ftLimit Bore Depth to 390 ftPipe diameter – 1 ¼”
http://img.directindustry.com/images_di/photo-g/well-drilling-rig-354735.jpg
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Geothermal Design24 Well Locations
Adequate spacing2” HDPE pipe to pump
house3 rectangular manifoldsDesign avoids tree removal!Pumphouse hidden from
view
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Site Design - Pumphouse
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
Plan View
Isometric View
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Model DesignConcrete with
installed piping and moisture sensor
InsulationSand Sub-baseSoil with installed
vertical geothermal loop
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Model Control System
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Conclusions - Cost Analysis
Payback Period: 55 yearsOur recommendation: Don’t do it!
Geothermal System
Natural Gas System
Initial Cost $420,000 $180,000
Operating Cost
$6,600 $10,900
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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ConclusionsWhy is this not economically feasible?We had three false assumptions:
Snow can be melted with ground temperature water
The entrance being isolated is a problem for traditional snowmelt systems
The ground can be an unending heat source
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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AcknowledgementsTrent DeBoer, GMB EngineeringSteve Schultz, GMB EngineeringScott Post, Prein&NewhofCharles Huizinga, Calvin College Physical PlantMarc Huizinga, Calvin College Physical PlantProfessor Nielsen, Team AdvisorRen Tubergen, Gumbo Product Development,
Inc.Gary Slykhouse, City of GR Engineering Dept.Bob Bruggink, Moore & Bruggink, Inc.
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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Questions
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions