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Team 13—GeoMELT

Team 13—GeoMELT. 12.7.09. The Team. Outline. Project Overview Goals Field Research Preliminary Design Model Experiments Design Norms Acknowledgements Questions. Project Overview. Michigan receives ≈ 72 inches of snow annually .

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Team 13—GeoMELT

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  1. Team 13—GeoMELT 12.7.09

  2. The Team

  3. Outline • Project Overview • Goals • Field Research • Preliminary Design • Model • Experiments • Design Norms • Acknowledgements • Questions

  4. Project Overview Michigan receives ≈ 72 inches of snow annually http://www.saugus.net/Photos/images/blizzard_05_snowplow.jpg Lake-effect snow can lead to severe storms, but Calvin never cancels class! http://www.duluthstreams.org/understanding/lake_effect.html

  5. Project Overview • Problems with the Burton St. Entrance to Calvin • Intersection is dangerous to plow during the daytime • Safety for Pedestrians and Vehicles • Conventional Snowmelt systems typically near buildings • Proposed Snowmelt Solutions • Closed Geothermal loop using 49° F fluid • Geothermal Ground Source Heat Pump

  6. Goals • Primary: To design a geothermal snowmelt system for Calvin’s Burton Street Entrance • Optimization and comparative analysis between • Heat pump or not? • Asphalt or concrete? • Secondary: To design and construct a small model to demonstrate the operation of a geothermal snowmelt system

  7. Field Research • Design drawings from Moore & Bruggink

  8. Field Research • Design drawings from Moore & Bruggink

  9. Field Research Site visit to Washington Ave. in Grand Haven Commercial snowmelt installation under asphalt

  10. Field Research Steam is supplied by the nearby power plant

  11. Preliminary System Design • Energy Requirements • 120-250 BTU/ft2 for a Type II (commercial) system • 112-330 BTU/ft2 ASHRAE values Buffalo, New York

  12. Preliminary System Design • First attempt at EES Model • Mathematical heat transfer model • Initial calculations are still not accurate enough to give numbers we can rely on • Pipe Design Choices • HDPE for Heat Collection Pipes • PEX for Heat Dissipation Pipes • Thermal Conductivity Considerations • Cost/Benefit Analysis

  13. Preliminary System Design • Heat 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 System • Costs and viability may have to be compared

  14. Preliminary Site Design • Option One: 1300 ft2

  15. Preliminary Site Design • Option Two: 3600 ft2

  16. Preliminary Site Design • Option Three: 4000 ft2

  17. Preliminary Site Design • Option Four: 7000 ft2

  18. Preliminary Site Design • Customer 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?

  19. Model • Experimental Model • Use to acquire scientific data • Empirically prove viability of geothermal snowmelt • Strictly controlled non-dimensional parameter for heat transfer • Cannot mimic real-world ground heat transfer conditions • Demonstrative Model • Demonstrates operation of a geothermal snowmelt system • Test control system • Not used to acquire empirical data

  20. Experiments • Thermocouples • 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 Collection • Grain Size Distribution Analysis • Thermal Conductivity Measurements • Wintertime Traffic Study • Vehicle and Pedestrian • Possibly even Plowing Frequency Methods

  21. Design Norms • Stewardship • Save on energy and reduce fossil fuel use • Balance needs and wants with cost and necessity • Caring • Increase safety for pedestrians and vehicles • Transparency • Not going to use smoke and mirrors • The calculations will speak for themselves

  22. Acknowledgements • Charles Huizinga, Calvin College Physical Plant • Marc Huizinga, Calvin College Physical Plant • RenTubergen, Industrial Consultant • Professor Nielsen, Team Advisor • Frank Gorman, Calvin College Architect • Gary Slykhouse, City of GR Engineering Dept. • Bob Bruggink, of Moore & Bruggink • Roy Laisure, of Moore & Bruggink

  23. Questions • We will now take your questions

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