Содержание
- 2. Alternative Energy Sources Solar Wind Hydropower Tidal Power Biomass Geothermal
- 3. Solar Power
- 4. Types of Solar Power Active Passive
- 5. Active Solar Power Energy from sun is stored in a “thermal mass” When needed, heat from
- 6. Active Solar Power This also refers to electrical generation using solar power Two ways to do
- 7. Large-scale Solar Electric Site
- 8. Large-scale Solar Electric Site These facilities use solar power to heat water to form steam. The
- 9. Passive Solar Power Works on the principle that hot air rises and cool air sinks (convection)
- 10. Passive Solar Power Mass wall or “Trombe Wall Using back wall as “mass” To rest of
- 11. Solar Power Benefits Abundant No greenhouse gases, few other pollutants Simple, minimal repair needed Cheap over
- 12. All areas have viable amounts of solar energy
- 13. Some solar power history Solar power furnace was used by Lavoisier to discover elements, particularly nitrogen
- 14. Wind Power
- 15. Wind power Can be used for mechanical tasks, e.g. pumping water Can be used for generation
- 16. Mechanical Power Windmills High torque, low-speed to pump water, grind grain, saw wood
- 17. Electrical Power Windmills High speed, low torque machines Will turn themselves off if wind speed exceeds
- 18. Effects of windpower No greenhouse gases Few other pollutants Cheap Abundant Simple Some noise pollution Metal
- 19. Where is wind power available? Wind power not highly suited to these areas
- 20. Hydropower Electric Mechanical
- 21. How hydropower works
- 22. Negative effects of Hydropower Flooding the land Displacement of local inhabitants Local climatic changes Tectonic activities
- 23. Positive Effects of Hydropower Can generate electricity Can do mechanical work, e.g. grind grain No greenhouse
- 24. Tidal Power
- 25. Tidal Power Essentially entails placing a dam across an ocean inlet and harnessing the energy as
- 26. Biomass Energy
- 27. Biomass Pros & Cons Burning biomass gets rid of solid waste Creates energy Creates new markets
- 28. Ethanol production: not environmentally benign
- 29. Geothermal Energy
- 30. Where is Geothermal in the U.S.?
- 31. Primarily in western U.S. Pros – Can be used for electricity generation, space heating, cooking &
- 32. How does it work? Drill to deep, hot rock Either wet system where heated water belowground
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