Anjali- Science- Solar Energy

Anjali- Science- Solar Energy - Anjali Wadhwa McHugh Period...

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Unformatted text preview: Anjali Wadhwa McHugh Period 6- Science Folsom HS February 13, 2007 Science is organized knowledge. -Herbert Spencer (1820-1903) English philosopher. Outline/Overview 1. Why Solar Power? 2. What Resources? 3. How Does It Work? 4. Where Is It Being Used? & How Extensively? 5. Advantages/Benefits/Rewards of Solar Power 6. Disadvantages/Costs/Risks of Solar Power 7. Conclusion 8. Works Cited Why Solar Power? Solar energy is exactly what it sounds like. Solar energy is a renewable energy source that is produced by the sun. Solar energy makes up 1% of the renewable energy produced in the United States. The sun is 125 times larger than the earth, making it a large and very easy form of energy. Due to the size of the sun and the amount of energy exposed, most American houses receive enough solar energy on the roof to provide heating for the entire year. Global warming is the biggest environmental problem on Earth. So how do we fight this problem? The greatest contributor to global warming is pollution from energy generation. We cannot eliminate global warming without switching to renewable energy. Renewable energy could clean the air, reduce global warming, and help eliminate Americas dependence on fossil fuels from overseas. What Resources? SOLAR DISH A solar dish/engine system uses solar collectors that track the sun on two axes, directing the energy at the focal point of the dish because it is always pointed at the sun. The power-generating equipment used with a solar dish can be mounted at the focal point of the dish, making it well suited for remote operations or, as with the solar trough, the energy may be collected from a number of installations and converted to electricity at a central point. The engine in a solar dish/engine system converts heat to mechanical power by compressing the working fluid when it is cold, heating the compressed working fluid, and then expanding the fluid through a turbine or with a piston to produce work. The engine is used with an electric generator to convert the mechanical power to electric power. SOLAR POWER TOWER A solar power tower or central receiver generates electricity from sunlight by focusing concentrated solar energy on a tower- mounted heat exchanger (receiver). This system uses hundreds to thousands of flat sun-tracking mirrors called heliostats to...
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This note was uploaded on 10/01/2011 for the course SCIENCE 100 taught by Professor Staff during the Spring '11 term at UC Irvine.

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Anjali- Science- Solar Energy - Anjali Wadhwa McHugh Period...

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