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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

LIVE INTERACTIVE LEARNING @ YOUR DESKTOP. Solar Energy in Middle and High School Classrooms Presented by: Michael Tinnesand and Rachel Pokrandt. September 13, 2011. Where does U.S. energy come from today?. Source: www.eia.gov. Where does U.S.energy come from today?. Source: www.eia.gov.

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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

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  1. LIVE INTERACTIVE LEARNING @ YOUR DESKTOP Solar Energy in Middle and High School Classrooms Presented by: Michael Tinnesand and Rachel Pokrandt September 13, 2011

  2. Where does U.S. energy come from today? Source: www.eia.gov

  3. Where does U.S.energy come from today? Source: www.eia.gov

  4. The Potential of Solar Energy

  5. How can we capture the Sun’s energy? • Passive Credit: U. S. Department of Energy-Solar Decathlon

  6. How can we capture the Sun’s energy? • Solar Concentrators 20 mW concentrator near Seville

  7. How can we capture the Sun’s energy? • Photovoltaic panels Credit: U. S. Department of Energy-Solar Decathlon

  8. How can we capture the Sun’s energy? • Solar Water heating

  9. How do we measure electricity usage? • Watts - A watt is a unit of power. It is a Newton meter per second, or can be given as a joule per second. • Kilowatts – 1,000 watts equals one kilowatt (kW) • Kilowatt-hours (kWh) – A device such as a plasma TV, which uses 1,000 watts for one hour consumes one kWh of power.

  10. How do Solar Panels work?

  11. How do Solar Panels work? Credit: rsc.org n-type p-type

  12. How do Solar Panels work?

  13. How do Solar Panels work?

  14. How are Solar Panels made? Credit: Solar World

  15. How are Solar Panels made? Credit: Solar World

  16. Challenges for 1st Generation Solar Panels • They don’t work at night and work poorly in cloudy weather. • Production uses toxic materials including greenhouse gases and must be treated to prevent release • Takes energy to produce solar panels (1-3 year ‘energy payback’) • Expensive • End-of-use recycling needs to be developed • Research in new solar panel technologies needs to continue, improving efficiency, cost, usability.

  17. 2nd Generation Solar • Cheaper • More flexible – more uses • Lighter • Not as efficient

  18. Examples of 3rd generation solar panels

  19. 5. Electrolyte with I-/I2 S 4. Catalytic layer to promote I- to I2 regeneration 2 [ i ] [ i ] 1. Sensitizer Dye 3 e 4 1 2 2. TiO2 Semiconductor 5 3. ITO electrode Insulating Seal S TiO2 Dye-Sensitized Solar Cells How do they work? What do they look like? * + S 1. A dye, adsorbed on TiO2 is excited by light 2. The excited dye injects an e- into the TiO2 - T O T O 2 n 2 n 3. The electron leaves the TiO2 and is carried through as current hv 1 - 4. The e- returns to the device and reduces the electrolyte - / 2 I I 5. The dye is reduced by the electrolyte + S

  20. Bioinspiration

  21. Blackberry Solar Cell Lesson Plan Standards and skills NS.9-12.1 SCIENCE AS INQUIRY NS.9-12.2 PHYSICAL SCIENCE NS.9-12.4 EARTH AND SPACE SCIENCE NS.9-12.5 SCIENCE AND TECHNOLOGY NS.9-12.6 PERSONAL AND SOCIAL PERSPECTIVES Lesson activities • Learn how traditional solar panels are made • Consider this process against the 12 principles of green chemistry • Construct a dye sensitized solar cell • Evaluate and compare the differences in solar cell technologies

  22. Making the cell with your students!

  23. TiO2 Dye-Sensitized Solar Cells

  24. Using Solar Power On the grid

  25. Using Solar Power Off the grid

  26. U.S. Department of EnergySolar Decathlon

  27. The Solar Decathlon Events

  28. Team Germany

  29. Team California

  30. Appalachian State University

  31. Phase Change Wallboard Photo: National Gypsum

  32. Measuring heat of phase change. • Measuring temperature vs phase change

  33. Measuring heat of phase change. • Measuring temperature vs phase change

  34. Measuring heat of phase change. • Heat of fusion lab

  35. Measuring heat of phase change. • Heat of fusion lab Specific heat capacity of paraffin ≈ 2 J/g x°C Hf of paraffin ≈ 200 J/g

  36. Resources • U.S. Department of Energy Solar Decathlon - http://www.solardecathlon.gov/ • ChemMatters – www.acs.org/chemmatters • Beyond Benign-Blackberry Solar Cell Activity - http://www.beyondbenign.org/K12education/highschool.html • Solar World - http://www.solarworld-usa.com/ • National Renewable Energy Lab - http://www.nrel.gov/learning/

  37. Thank you to the sponsor of tonight's Web Seminar: This web seminar contains information about programs, products, and services offered by third parties, as well as links to third-party websites. The presence of a listing or such information does not constitute an endorsement by NSTA of a particular company or organization, or its programs, products, or services.

  38. http://learningcenter.nsta.org

  39. National Science Teachers Association Dr. Francis Q. Eberle, Executive Director Zipporah Miller, Associate Executive Director Conferences and Programs Al Byers, Assistant Executive Director e-Learning NSTA Web Seminars Paul Tingler, Director Jeff Layman, Technical Coordinator LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

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