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Renewable Energy

Renewable Energy

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Renewable Energy

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Presentation Transcript

  1. Renewable Energy Part I: SOLAR

  2. Warm-up • Draw an image of what solar energy looks like. How do you think solar energy works? • What are some ways in that you can use solar energy at home? Draw from the energy efficient homes that we discussed earlier in class.

  3. IMAGE 1 IMAGE 2

  4. Active Solar Passive solar

  5. Solar Energy Passive Solar

  6. Passive Solar • Absorbs and stores heat from the sun directly within a structure without the need for pumps to distribute the heat.

  7. Pros and Cons of Passive Solar? Advantages Disadvantages Initial cost is high Sun could be blocked by other structures May be unattractive Need access to sun for it to work • Energy is free • Net energy moderate • No CO2 emissions • Low air and water pollution • Low land disturbance

  8. Cooling houses naturally • Insulation • Take advantage of breezes • Shading them • Having light colored or green roofs

  9. Solar Energy Active Solar

  10. Active Solar • Converts solar energy into electricity

  11. Solar Thermal

  12. Solar Thermal

  13. Solar Thermal

  14. Photovoltaic Cell

  15. Photovoltaic Cells • Made out of semiconductors

  16. PV Cells • Solar cells can be used in rural villages with ample sunlight who are not connected to an electrical grid.

  17. Pros and Cons of Active Solar Advantages Disadvantages Low efficiency High costs Back up system needed High land use May disturb desert areas • No CO2 emissions • Not as bad environmental impact as other sources • Fast construction

  18. Discussion • Should the world greatly increase its dependence on solar cells? How about California, specifically? Explain your reasoning.

  19. Solar Pizza Box Oven Passive? or Active?

  20. Next Class: We will building our own solar pizza box oven!