1. 05.08.2010 TEAM GEOMELT

2. The Team Jacob Speelman (ME) Caleb Rottman (EE) RICO Ledy (ME) Eric Geerlings (CE)

3. Outline Project Introduction Goals Site Assessment Design Norms Final Design Snowmelt Geothermal Pumphouse Model Project Cost Conclusions Acknowledgements Questions

4. 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 IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

5. Project Introduction Problems with the Burton St. Entrance to Calvin Why not use Geothermal energy to melt snow? http://www.bing.com/maps IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

6. Introduction - Goals Primary Goal: Design a geothermal snowmelt system at Calvin’s Burton Street Entrance Secondary Goal: Design a small scale model IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

7. Introduction - Design Norms Stewardship Save on energy and reduce fossil fuel use Caring Increase safety for pedestrians and vehicles Transparency Honest recommendation IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

8. Introduction – Site Analysis Assess 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 IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

9. Introduction – Site Analysis Existing Infrastructure Pavement/Curb lines Watermain Gas main Storm Sewer Fiber Optic Line IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

10. How it works Snowmelt 101 Results you get! Pipes buried in concrete Slip free surfaces No need to shovel/plow IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

11. Snowmelt 101 Using the software program EES for Thermodynamics IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

12. Snowmelt 101 Temperature drives heat transfer! 55 °F water Ice formation IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

13. Snowmelt Design 4,000 ft 2 to melt at 150 BTU/hr- ft 2 60 tons ≈ 20 times the heat load of a house 2 Manifolds are used to distribute heat to the snowmelt area http://www.bing.com/maps IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

14. Snowmelt Design – Pipe Layout 1” PEX pipe 500’ length loops 9” on center pipe spacing 3” from concrete surface IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

15. Geothermal Energy 101 Ground temperature over a year at varying depths Kavanaugh, Stephen P., and Kevin Rafferty. Ground-Source Heat Pumps. Atlanta: ASHRAE, 1997. 125-26. Print. IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

16. Geothermal Energy 101 Pump fluid through buried pipes to extract energy http://focusedthinking.files.wordpress.com/2009/04/geothermal_heat_pump.jpg IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

17. Geothermal Energy 101 Heat In Heat Out IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions Residual Temperature Effects Balanced systems

18. Geothermal Design Horizontal vs. Vertical IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

19. Geothermal Design Calculated the total bore length required: 9375 ft Which is approximately 1.75 miles Limit each bore depth to 390 ft Pipe diameter – 1 ¼” http://img.directindustry.com/images_di/photo-g/well-drilling-rig-354735.jpg IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

20. Geothermal Design 24 Well Locations Adequate well spacing 3 rectangular manifolds Design avoids tree removal! Pumphouse hidden from view IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

21. Heat Pumps 101 Condenser Evaporator From Geothermal Loops To Snowmelt Loops Q Q Compressor IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions Valve

22. Heat Pumps Entering temperature of 105 °F Exiting temperature of 90 °F IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

23. Pump House Design Plan View Isometric View IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

24. Model Design Concrete with installed piping and moisture sensor Insulation Sand Sub-base Soil with installed vertical geothermal loop IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

25. Model Control System IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

26. Project Cost Geothermal Snowmelt System Cost Breakdown IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

27. Project Cost Comparison Payback Period: 55 years Geothermal SystemNatural Gas System Initial Cost$420,000$180,000 Operating Cost $6,600 $10,900 IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

28. Conclusions Payback Period: 55 years Our recommendation: Don’t do it! Geothermal SystemNatural Gas System Initial Cost$420,000$180,000 Operating Cost $6,600 $10,900 IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

29. Conclusions What else did we learn? Teamwork on a multidisciplinary project Defining project goals early on is important Have Fun! IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

30. Acknowledgements Trent DeBoer, GMB Engineering Steve Schultz, GMB Engineering Charles Huizinga, Calvin College Physical Plant Marc Huizinga, Calvin College Physical Plant Professor Nielsen, Team Advisor Ren Tubergen, Gumbo Product Development, Inc. Bob Bruggink, Moore & Bruggink, Inc. IntroSnowmeltGeothermalPump HouseModelProject CostConclusionsQuestions

31. QUESTIONS… Please ask !