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Alternative Sources – Ch. 20 & 21

Alternative Sources – Ch. 20 & 21. Nuclear energy. Nuclear energy = the energy that holds together protons and neutrons within the nucleus of an atom nuclear fission = the splitting apart of atomic nuclei. Nuclear Power Plant. 101 in U.S. 436 online Under Construction. CT NY.

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Alternative Sources – Ch. 20 & 21

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  1. Alternative Sources – Ch. 20 & 21

  2. Nuclear energy • Nuclear energy = the energy that holds together protons and neutrons within the nucleus of an atom • nuclear fission = the splitting apart of atomic nuclei

  3. Nuclear Power Plant 101 in U.S.

  4. 436 onlineUnder Construction CTNY

  5. Coal versus nuclear power

  6. Waste stored onsite in pools – expected to be at capacity in 2015

  7. NIMBY – not in my backyard

  8. 20_11a.jpg

  9. 20_08.JPG

  10. 20_10.JPG

  11. Yucca Mountain, Nevada NRDC Testimony on Fukushima

  12. Breeder Reactors

  13. Fusion Research • Nuclear fusion = the process that drives our Sun’s vast output of energy • The force behind hydrogen (thermonuclear) bombs • Involves forcing together the small nuclei of lightweight elements under extremely high temperature and pressure

  14. Renewable Energy Around the World

  15. Biomass

  16. Biomass • Biofuels = biomass sources converted into fuels to power automobiles. Biofuel cropsAlgae to Biofuels Umich.edu

  17. Biomass Advantages Disadvantages Indoor air pollution if not vented IF crops used – competes with food production, fertilizers, pesticides, high energy input • Carbon neutral (IF not overharvested) • Supports rural communities • Reduced emissions: SO2, mercury • Reduced dependence on fossil fuels

  18. Hydroelectric power • Hydroelectric power = uses the kinetic energy of moving water to turn turbines and generate electricity

  19. A typical dam

  20. A run-of-river system

  21. Hydropower Advantages Disadvantages People displaced Habitat destruction upstream and downstream Diadromous fish blocked from migrating to spawn Natural flooding cycles disturbed Thermal pollution Most large rivers already dammed • Renewable • No emissions • High Efficiency

  22. Hydropower may not expand much more • China’s Three Gorges Dam is the world’s largest dam • Most of the world’s large rivers have already been dammed • People have grown aware of the ecological impact of dams • Developing nations will probably increase hydropower if they have rivers

  23. Solar energy • Passive solar energy = the most common way to harness solar energy • Buildings are designed to maximize direct absorption of sunlight in winter and keep cool in summer • Active solarenergy collection = uses technology to focus, move, or store solar energy

  24. Active - photovoltaic cell

  25. Active – Solar Water Heating

  26. Passive – space heating Ecohomeduluth.com

  27. Location is a drawback • Not all regions are sunny enough to provide enough power, with current technology • Daily and seasonal variation also poses problems Advantages/Disadvantages?

  28. U.S. wind-generating capacity Wind's capacity to generate power varies according to wind speed

  29. Advantages/Disadvantages?

  30. Tidal and Wave Energy Advantages/Disadvantages?

  31. Geothermal Advantages/Disadvantages? Bbc.co.uk

  32. Geothermal.marin.org Advantages/Disadvantages? Wikipedia.org

  33. Epa.gov

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