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Exploring Alternative Energy Sources: Part 1 - Solar Energy

Learn about the different types of alternative energy sources, focusing on solar energy. Discover the various types of photovoltaics, including crystal and thin film technology. Explore solar water heating, thermal solar, and passive solar techniques.

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Exploring Alternative Energy Sources: Part 1 - Solar Energy

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  1. Green RevolutionPart 3 “Alternative Energy Part 1”

  2. VOCABULARY WORDS “Alternative” Energy Sources Solar • Photovoltaics (PV) - 2 types: Crystal & Thin Film • Solar Water Heater • Thermal Solar • Passive Solar Thin Film

  3. Photovoltaics Types Crystals • Most powerful • Expensive • Heavier • Fragile Thin Films • Cheaper • Lighter • Flexible • Much less power, but have the area advantage that helps a little.

  4. Crystals • Manufactured Round • We do 4 cuts to make more square • Still have a packing problem round objects into a square • Also, some of the wires go on the front and block some light.

  5. Mono Crystals • Manufactured Round • Square them off a bit • Still doesn’t cover entire area though • Wires travel across the surface blocking some light

  6. Poly Crystals • Manufactured Whatever shape! • Wires travel across the surface blocking some light • Cheaper to make than Mono Crystals

  7. Photovoltaics Types Page 1 • Amorphous Silicon (a-Si) • Biohybrid • Buried Contact • Cadmium Telluride (CdTe) • Concentrated PV cell (CVP and HCVP) • Copper-Indium-Gallium-Selenide (Ci(G)S) • Crystalline Silicon (c-Si) AKA “Wafer” • Dye-sensitized (DSSC)

  8. Photovoltaics Types Page 2 9. Gallium-Arsenide-Germanium (GaAs) 10. Hybrids (combinations of others into one) 11. Luminescent Solar Concentrator (LSC) 12. Micromorh (tandem-cell using Si/uc-Si) 13. Monocrystalline (mono-Si) 14. Multi-junction (MJ) 15. Nanocrystal 16. Organic (OPV) 17. Perovskite 18. Photoelectrochemical (PEC) 19. Plasmonic

  9. Photovoltaics Types Page 3 20. Polycrystalline (multi-Si) 21. Polymer 22. Quantum dot 23. Solid-state 24. Thin-film (TFSC) 25. More being developed everyday!

  10. Silicon, Indium-Gallium-Phosphide, Indium-Gallium-Arsenide, & Germanium • 34.5% efficient Solar Cell (World Record) • Hybrid - basically 4 cells mashed into one • Breaks the light into different spectrums to match the different materials best spectrums

  11. Thermal Solar • In the end they all use HEAT from sunlight to boil water and make steam to turn a turbine generator. • Mirrors and/or lenses concentrate the light to a temperature / point that can flash water into steam.

  12. Thermal Solar • Yes, many use the heat to heat up Sodium, Sodium Chloride (table salt in liquid form), or etc. They then the hot liquid substance to heat water to make steam…

  13. Solar Hot Water • Heat from solar radiation is used to heat water for small residential / commercial use. • May not get water 100% of the way to the desired temperature, but gets it very close, then a small electric or gas heater can get it the rest of the way quickly, cheaply, and easily.

  14. Passive Solar • Oldest form of solar used by man. • The buildings shape can be made to: Warm the home in winter, promote cooling drafts in summer, let light inside during winter and keep it out in the summer, store heat of the day in winter for the night.

  15. Passive Solar • Large south facing porches • Keeps sun out of windows in summer, even with the windows open, lets in the sun during the winter. • The use of white also reflects heat away during hot summers.

  16. Passive Solar • Deciduous trees block hot sun during the summer and let it in during cold winter. • Floor materials can be used as heatsinks • Computerized vents and shades • Solar hot water systems

  17. Passive Solar

  18. Passive Solar

  19. Passive Solar

  20. VOCABULARY WORDS “Alternative” Energy Sources Solar • Photovoltaics (PV) - 2 types: Crystal & Thin Film • Solar Water Heater • Thermal Solar • Passive Solar

  21. The End

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