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Off-Grid Solar Power System

Off-Grid Solar Power System. Engineering Service Learning (Engr. 4692.01S) Zach Dombi, Vincent Mazzone Bradley “Scott” Valentine, Peter Worley 5/29/2014. Conclusion References and Acknowledgements. Presentation Topics. Project Details Background Objectives Design Process Electrical

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Off-Grid Solar Power System

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  1. Off-Grid Solar Power System Engineering Service Learning (Engr. 4692.01S) Zach Dombi, Vincent Mazzone Bradley “Scott” Valentine, Peter Worley 5/29/2014

  2. Conclusion References and Acknowledgements Presentation Topics • Project Details • Background • Objectives • Design • Process • Electrical • Mechanical • Post-Trip Results • Issues Encountered • Objectives Achieved/Deliverables • Sustainability and Ownership • Cost Analysis

  3. Introduction Team Members

  4. Background Information: Problem • Model Home • Stability • Health • Living Condition • Residential Electricity • Lights • Cellphone • Television • Fans • Refrigerator

  5. Background Information: Goal • Vocational School Dorm • Model home plus wings • 8 students • Off-Grid Power • Grid unreliable • High rates • Long term vision • Wind Power Impractical

  6. Need • Scope • Construct pilot off-grid solar system at local home • Power numerous appliances • 1 day autonomy • Constraints • $1,400 budget • Local parts • Safety • Replicable design

  7. Objectives • Deliverables • Functioning solar system • Information and maintenance packet • On-site testing • Power levels • Completed circuit • Economic Analysis • Rate of return

  8. Design Process • Determine desired electrical devices • Determine energy demand • Size inverter - max wattage • Max wattage • Determine insolation or sun-hours/day • Select solar panels • 15% inverter loss • 16% 20 year loss • Size batteries - 50% depth • Determine wire and circuit breakers

  9. Pre-Trip Electrical Design • Panel 180 W • Safety box • Battery - 105 Ah • Charge Controller - 15 A • Inverter - 450 W • Light bulbs with strings

  10. Pre-Trip Mechanical Design • Pole mount • Security bolts • Concrete foundation

  11. In-Country Implementation • La Bonanza • Rural, impoverished community • House does not have its own grid connection

  12. The House • Living room, kitchen, bedroom • 2 lights, one outlet • Unsafe

  13. Electrical Box • Protection from environment • Child safety • Ventilation

  14. Mount Frame • Scrap metal • Welded • Bolt panel to frame

  15. Mount Pole • Two galvanized “canteletas” welded together • Significantly cheaper than metal pole • $40 vs. $100 • 13 feet • 4 feet in the ground • 9 feet above the ground The beams were laid on each other and welded along the seam every few feet on both sides.

  16. Foundation • 2 foot diameter by 4 feet deep hole • Concrete with rebar • Ingenious Dzwonczyk Collar

  17. Final Assembly

  18. Location of Electrical Components within Home

  19. Electrical Wiring • Four Outlets • Four Light fixtures • One circuit

  20. General Wiring Diagram

  21. Issues Encountered • The amount of cement needed • Alignment of the bolt holes • Panel and mounting system • Securing the wood platforms • A short in the system • Grounding error • The iron

  22. Objectives Achieved and Deliverables • Six main objectives/goals • Local parts versus low cost • Maintenance manual and a day of education • Under budget

  23. Sustainability and Ownership • All major parts bought locally • Minor parts can be purchased in country • Aiding in the installation • Education seminar

  24. Cost Analysis Total Cost: $1,177.23 • $1053.80 in Honduras • all major solar panel components and other miscellaneous items • $123.43 in United States • minor items (i.e. screws, outlets, fixtures)

  25. Economic Analysis • If use > 200 kWh/month there is an economic case for solar • WGM compound uses ~ 220 kWh/month • WGM vocational school would use more

  26. Non-Economic Analysis • Grid power erratic (frequent power outages) • Remote villages unable to be grid-tied • Islands • Hill/mountain sides

  27. Conclusion • Achieved goals set by scope of work • Objectives adjusted while in country to account for new information • Easily replicable if funds are able to be generated • Ownership established • Viable for use in areas with no possibility of grid access in the foreseen future

  28. Acknowledgments • Roger and Mariant • Larry and Angie Overholt and WGM • Engineering Education Innovation Center • Solar Education and Outreach: Jason Mulligan • Wiring Lab: Mike Lichtensteiger

  29. References 1. http://www.state.gov/e/eb/rls/othr/ics/2012/191162.htm 2. https://www.worldcityweb.com/past-events/global-connections/7808-energy-forum-ways-to-cut-energy-costs-in-latin-america 3. http://www.siliconsolar.com/off-grid-solar-systems.html 4. http://tyconpower.com/products/images/world_insolation_map_04-1250x691%20%281%29.gif

  30. Questions?

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