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Thermal and PV System Lauren Masseria Jenny Bishop Bryan Picard

Thermal and PV System Lauren Masseria Jenny Bishop Bryan Picard. Solar Photovoltaic Photo=light Voltaic=electricity. The conversion of solar energy directly into electricity. Brief History. Discovery credited to French physicist Edmund Becquerel in 1839 ‘Wet Cell’ Battery

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Thermal and PV System Lauren Masseria Jenny Bishop Bryan Picard

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  1. Thermal and PV SystemLauren MasseriaJenny BishopBryan Picard

  2. Solar PhotovoltaicPhoto=light Voltaic=electricity The conversion of solar energy directly into electricity

  3. Brief History • Discovery credited to French physicist Edmund Becquerel in 1839 • ‘Wet Cell’ Battery • 1883 the first PV cell was created • 1950 at the Bell Laboratory, New Jersey • Research on silicon semiconductors • 1960’s-70’s Orbiting satellite usage • 1970’s Rise in residential and commercial usage • Energy crisis • 1980’s Consumer electronic devices

  4. Why Solar? • Reliable • Long term cost benefits • Environmentally friendly • Remote Locations (grid unavailability) • State, federal and private incentives • Socially responsible • Positive public image

  5. Panels & Cells • A cell consists of sliced up crystals, connected with wire, and placed in a module • Life expectancy = over 30 years • There is nothing exhausted in the silicon cells, and theoretically, if well packaged and protected from moisture they could produce electricity indefinitely.

  6. PV cells are a junction between two thin layers of dissimilar semi-conduction materials known as ‘p’ and ‘n’ type semi conductors • Most cells made from silicon, a semiconductor, and the second most abundant element in the earth’s crust • Sets up an electric field when joined • Photons (sun energy) hit this electric field and transfer energy to the p and n semi conductors creating a reverse electric field and an electric current

  7. Types of Cells Three types of PV cells Monocrystalline Polycrystalline Amorphous

  8. Monocrystalline Silicon with a single crystal lattice structure with no impurities and virtually no defects most efficient at 16% • most expensive • longest life span

  9. Polycrystalline Consists of many small grains of connected monocrystalline silicon • 15% efficiency • typically less expensive than monocrystalline

  10. Amorphous / Thin Film Silicon are much less ordered than in the mono and polycrystalline cells • 8% efficiency • least expensive • Most flexible models, ex rolls • Take the most space • Are being phased out

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