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Understanding Energy Units and Renewable Power Sources

This resource explores essential energy terms, focusing on units like calories, Joules, and British thermal units (Btus). It also delves into renewable energy sources including solar, wind, geothermal, wave, and biodesel. Each section highlights how these energy forms relate to the sun and the underlying science. The document emphasizes group activities to deepen understanding of technology, applications, limitations, and future potentials in renewable energy. Utilize this guide for educational purposes or to spark interest in sustainable energy.

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Understanding Energy Units and Renewable Power Sources

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  1. Renewable Energy

  2. Energy Terms • Calorie (Cal) The amount of energy needed to raise the temperature of one gram of water one degree Celsius. One calorie equals 4.187 joules or 0.003969 British thermal units (Btu). • British thermal unit (Btu) 1. A unit of energy = 252 calories. 2. energy needed to raise T of 1 pound of H2O one degree F. • Joule - A unit of energy. One joule equals 0.2388 calories. How many Btu? • Watt – Rate of energy conversion. One watt equals one joule of energy per second. • Kilowatt: 1000 • Megawatt: 1,000,000 • Gigawatt: 1,000,000,000 • Terrawatt: 1,000,000,000,000

  3. Solar • http://www.youtube.com/watch?v=rO5rUqeCFY4&feature=relmfu • http://www.thefutureschannel.com/dockets/science_technology/solar_power/ • All energy sources can track back to the sun.

  4. Wind Power • http://www.youtube.com/watch?v=tsZITSeQFR0 • http://www.youtube.com/watch?v=x8PjVoYRuYs • Wind is caused by solar radiation differential heating

  5. Superconductor • http://www.thefutureschannel.com/dockets/science_technology/maglev_trains/

  6. Geothermal • http://www.youtube.com/watch?v=y_ZGBhy48YI&feature=relmfu • http://www.youtube.com/watch?v=orvNJWZ6hDQ&feature=related • Geothermal heat… residual solar heat from earth’s origins

  7. Wave Power • http://www.youtube.com/watch?v=tSBACzRE3Gw • Wave power … wind generated and/or tidal

  8. Biodesel • http://www.youtube.com/watch?v=IhpeXuRYJWg • Clean burning alternative, uses sun’s energy processed by plants

  9. Fuel Cells • http://www.youtube.com/watch?v=esuAlB4NVi0

  10. Research Subject • Wind • Solar • Wave • Hydro • Fuel Cells • Biodesel • Geothermal

  11. Research Expectations • Groups of 3 • Prepare 5-8 minute activity or lecture or demo • Technology: how does it work? • Applications: how can it be used? • Limitations: practical or technical reasons it isn’t widely used • Accessibility: can the average person use it? • Effectiveness: replacement time, waste produced? • Future: next generation applications, etc.

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