12.7.09 TEAM 13—GEOMELT. The Team Jacob Speelman (ME) Caleb Rottman (EE) Eric Ledy (ME) Eric Geerlings (CE)

12.7.09

TEAM 13—GEOMELT

The Team

Jacob Speelman

(ME)

Caleb Rottman (EE)

Eric Ledy (ME)

Eric Geerlings

(CE)

OutlineProject OverviewGoalsField ResearchPreliminary DesignModelExperimentsDesign NormsAcknowledgementsQuestions

Project Overview

Overview

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Lake-effect snow can lead to severe storms, but Calvin never cancels class!

Michigan receives ≈ 72 inches of snow annually

http://www.saugus.net/Photos/images/blizzard_05_snowplow.jpg

http://www.duluthstreams.org/understanding/lake_effect.html

Project OverviewProblems with the Burton St. Entrance to

CalvinIntersection is dangerous to plow during the

daytimeSafety for Pedestrians and VehiclesConventional Snowmelt systems typically near

buildingsProposed Snowmelt Solutions

Closed Geothermal loop using 49° F fluidGeothermal Ground Source Heat Pump

Overview

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GoalsPrimary: To design a geothermal snowmelt

system for Calvin’s Burton Street EntranceOptimization and comparative analysis

betweenHeat pump or not?Asphalt or concrete?

Secondary: To design and construct a small model to demonstrate the operation of a geothermal snowmelt system

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Field ResearchDesign drawings from Moore & Bruggink

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Field Research

Design drawings from Moore & Bruggink

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Field Research

Site visit to Washington Ave. in Grand Haven

Commercial snowmelt installation under asphalt

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Steam is supplied by the nearby power plant

Preliminary System DesignEnergy Requirements

120-250 BTU/ft2 for a Type II (commercial) system

112-330 BTU/ft2 ASHRAE values Buffalo, New York

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Preliminary System DesignFirst attempt at EES Model

Mathematical heat transfer modelInitial calculations are still not accurate

enough to give numbers we can rely on Pipe Design Choices

HDPE for Heat Collection PipesPEX for Heat Dissipation PipesThermal Conductivity Considerations

Cost/Benefit Analysis

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Preliminary System DesignHeat Pump

With or Without a heat pump?Rough calculations suggest that if there is no

heat pump, the water pump would have to run at > 400 GPM

Heat pump may be required to supply necessary power in order to attain a more reasonable flow rate of < 200 GPM

Heat Pump vs. Steam SystemCosts and viability may have to be compared

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Preliminary Site DesignOption One: 1300 ft2

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Preliminary Site DesignOption Two: 3600 ft2

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Preliminary Site DesignOption Three: 4000 ft2

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Preliminary Site DesignOption Four: 7000 ft2

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Preliminary Site DesignCustomer vs. Public Needs

Where do pedestrians walk? Do they slip and fall?Do they cross the entrance often?

How might drivers be affected?Which areas must be melted to solve plowing

issues?

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ModelExperimental Model

Use to acquire scientific data Empirically prove viability of geothermal snowmeltStrictly controlled non-dimensional parameter for

heat transferCannot mimic real-world ground heat transfer

conditionsDemonstrative Model

Demonstrates operation of a geothermal snowmelt system

Test control systemNot used to acquire empirical dataOvervie

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ExperimentsThermocouples

Suffering the consequences of getting behind schedule

We will install thermocouples at 2, 4, 6, and 8 feet We will be taking data weekly

Soil CollectionGrain Size Distribution AnalysisThermal Conductivity Measurements

Wintertime Traffic StudyVehicle and PedestrianPossibly even Plowing Frequency Methods

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Design NormsStewardship

Save on energy and reduce fossil fuel useBalance needs and wants with cost and

necessityCaring

Increase safety for pedestrians and vehiclesTransparency

Not going to use smoke and mirrorsThe calculations will speak for themselves

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AcknowledgementsCharles Huizinga, Calvin College Physical

PlantMarc Huizinga, Calvin College Physical

PlantRen Tubergen, Industrial ConsultantProfessor Nielsen, Team AdvisorFrank Gorman, Calvin College ArchitectGary Slykhouse, City of GR Engineering

Dept.Bob Bruggink, of Moore & BrugginkRoy Laisure, of Moore & BrugginkOvervie

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QuestionsWe will now take your questions

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