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Solar Energy: A Renewable Energy Source

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A brief history and presentation about using solar energy as a renewable energy source.

A brief history and presentation about using solar energy as a renewable energy source.

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  • 1. Solar Energy: A Renewable Energy Source By Shelly Shinevar
  • 2. Trivia The Sun is 93 million miles away from the Earth. How many minutes does it take for light to travel this distance? The Sun will exhaust its supply of hydrogen in about __ billion years, at which time it will collapse under it’s own weight and become very hot. Eventually, it will become big enough to swallow the orbits of Venus & the Earth.
  • 3. More trivia:Solar energy alone could meet the world’s energy supply needs simply by covering as little as ___% of the world’s deserts with photovoltaics.
  • 4. Solar energy has been harnessed since ancient times: The Greeks and the Chinese first began to build buildings facing the sun for light and heat. This is an example of passive solar techniques.
  • 5. Passive Solar Technology Involves selecting materials capable of absorbing sunlight and heat such as wood, earth, concrete or asphalt or Designing spaces to circulate air or to face the sun.
  • 6. A traditional Chinese house made of mudbrick. The homesusually faced south to keep out the cold north wind.
  • 7. An ancient Greek peasant hut, built of mud and embedding sticks andstraws, would face the entrance towards the sun to utilize the heat.
  • 8. Active solar technologies involve using photovoltaic panels, pumps and fans toconvert sunlight into useful applications.
  • 9. The further away you get from theequator, the less sunlight is available. The ability to store solar energy is very important.
  • 10. Various techniques and methods involved in usingsolar energy: Greenhouses Daylighting systems Solar hot water systems Solar cookers Photovoltaics Concentrating solar power (CSP) Solar furnaces Solar ponds Solar cars and boats Solar thermoelectric plants and devices
  • 11. More recent inventions make utilizingsolar energy more energy efficient: For flat commercial roofs, a new line of “stick- on” solar modules have been developed. MIT chemical engineers have developed carbon nanotubes capable of concentrating solar energy up to 100 times more than a photovoltaic cell.
  • 12. The crown heralding the largest operational PVplant in North America now belongs to the 100megawatts on-line of the 290-megawatt AguaCaliente solar project in Yuma County, Arizona.Construction is still in progress, with completionexpected in 2014.
  • 13. Answers to Trivia
  • 14. The EndThe End

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