05.08.2010 team geomelt. the team jacob speelman (me) caleb rottman (ee) rico ledy (me) eric...
Post on 18-Dec-2015
222 Views
Preview:
TRANSCRIPT
05.08.2010
TEAM GEOMELT
The Team
Jacob Speelman
(ME)
Caleb Rottman (EE)
RICO Ledy (ME)
Eric Geerlings
(CE)
OutlineProject OverviewMajor Design DecisionsDesign
SnowmeltGeothermalSite DevelopmentModel
ConclusionsQuestions
Project OverviewProblems with the Burton St. Entrance to
CalvinWhy not use Geothermal energy?
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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
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
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
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
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
Condenser
Evaporator
From Geothermal Loops
To Snowmelt Loops
Q
Q
Compressor
Snowmelt Design – Heat PumpEntering temperature of
105 °FExiting temperature of 90
°F
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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
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
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
Site Design - Pumphouse
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
Plan View
Isometric View
Model DesignConcrete with
installed piping and moisture sensor
InsulationSand Sub-baseSoil with installed
vertical geothermal loop
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
Model Control System
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
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
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
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
Questions
Overview Decisions SnowmeltGeotherma
lSite Design Model
Conclusions
Questions
top related