1. Renewable Energy Sources Chapter 18

2. Producing Electricity Photovoltaic Cells Solar Power Tower Tides Wind Hydroelectric Geothermal Biomass

3. Heating and Cooling Passive Solar Biomass Geothermal

4. Fuel for Transportation Biomass Hydrogen Fuel Cells Photovoltaic Cells

5. Every hour enough energy from the sun reaches the Earth to meet the world’s energy demands for a YEAR!

6. Solar Energy

7. Solar cooker

8. Passive Solar Heating http://www.livingonsolar.com/passive-solar-video.html (2:14 mins)

9. Passive Solar Heating

11. ADVANTAGES –Free energy –No pollutants –Safe DISADVANTAGES –Is there enough available sunlight in all areas? –Sometimes needs back-up heating source

12. Active Solar Heating

14. ADVANTAGES –No pollutants –Safe DISADVANTAGES –Requires maintenance –Is there enough available sunlight in all areas? –Requires a backup hot water source

15. Solar Water Heaters Should governments require measures, such as solar water heating in new buildings, as part of an energy efficiency plan?

16. Photovoltaic (Solar Cells) Photovoltaic cells at your housePhotovoltaic farm (power plant)

17. Photovoltaic Cells 1.Sunlight strikes semi-conductor 2.Electrons move 3.Energy can be stored in battery http://www.youtube.com/watch?v=K76r41jaGJg (1:07 mins)

18. Photovoltaic Cells ADVANTAGES –No pollutants –Safe DISADVANTAGES –Expen$ive! –Need large surface area –Unattractive –Is there enough available sunlight in all areas? –Requires a backup electricity source

19. Hydrogen Fuel Cells How it Works: –Combines H with O to produce energy –Can be fueled by anything with H in it Natural gas, alcohol, gas –Gives off water http://www.pbs.org/wgbh/nova/sciencenow/3210/01.html

20. Hydrogen Fuel Cells ADVANTAGES –H is abundant –Non polluting DISADVANTAGES –Not very efficient to produce Takes electricity to split water and produce H –Expensive –Needs to be stored at high pressure

21. Hydroelectric Dam

23. Hydroelectricity ADVANTAGES –No pollutants –Electricity is cheaper per watt than coal. –Flood control –Reservoir for recreation & irrigation DISADVANTAGES –Floods upstream land and reduces flow downstream –Tremendous environmental damage during construction –Dam construction is extremely expensive –Displaces people from homes

24. Offshore Turbines

25. Tidal Barrage

26. Tidal Energy How it works: –Offshore Turbines Similar to underwater windmills –Tidal Barrage Similar to hydroelectric dams

27. Tidal Energy ADVANTAGES –No pollutants –More predictable than solar and wind DISADVANTAGES –May affect marine ecosystems –Unattractive –Expensive to build –Affects shipping

28. Will it become a widely used form of energy in the future?

29. Wind Energy GE commerical: http://www.youtube.com/watch?v=fViObqGvIjMhttp://www.youtube.com/watch?v=fViObqGvIjM

31. Wind Energy

32. ADVANTAGES –No pollutants –Well developed technology –Cheap DISADVANTAGES –Unattractive –Can only be in windy areas –Noisy –Kills bats

33. Wind graph from pg. 495 Double axis – what is it trying to show? Write a title

34. Geothermal Electricity

35. Geothermal Energy for electricity How it works: –Uses Earth’s heat to create steam to make electricity –Hot Dry Rock Method Pump cold water below ground Turns to steam Extract pressurized steam Turns turbine, turns generator, creates electricity

36. Geothermal Heat Pump

37. Geothermal Energy - overall ADVANTAGES –No pollutants –Minimal environmental damage during set-up –Predictable DISADVANTAGES –Limited availability on Earth –Can deplete the water reservoirs

38. Biomass How it works: –Burn organic matter to produce heat –Examples: Wood (#1 in world usage) Municipal Waste (garbage) Sugar cane (Hawaii) Chicken droppings http://www.youtube.com/watch?v=f05Xm4aYqXYhttp://www.youtube.com/watch?v=f05Xm4aYqXY – 1:25 http://www.youtube.com/watch?v=ZdG4SEVa4HQ&feature=related

39. LA airport has implemented a pilot program…use bacteria to break down food wasted from airline meals to generate electricity. The methane produced by the bacteria is transferred to a power plant, where it is burned to generate electricity.

40. Biomass ADVANTAGES –Reduces “wastes” –Sell extra electricity to public DISADVANTAGES –Some gas emissions –Neighborhood opposition Who wants to live near a plant that burns trash or chicken poop?

41. Trash to steam http://www.youtube.com/watch?v=iioOVevReOs http://www.youtube.com/watch?v=3r2_6U9g4jw&feature=related

43. Green Design Elements

44. Nanyang Technological University, Singapore

45. Hearst Building, NY

46. Parking Garage, CA

47. Dunkin’ Donuts, FL

48. Hillside Home, CA

49. Green homes Net Zero House in Bainbridge - https://www.youtube.com/watch?v=SV3euyl8mlw https://www.youtube.com/watch?v=SV3euyl8mlw Greenest home in america - https://www.youtube.com/watch?v=iAFTcxbYtMM (~1:50) https://www.youtube.com/watch?v=iAFTcxbYtMM LEED platinum/gold - https://www.youtube.com/watch?v=ifTBxGba_Ac https://www.youtube.com/watch?v=ifTBxGba_Ac https://www.youtube.com/watch?v=AH0mPDIfCGQ (~4:36)https://www.youtube.com/watch?v=AH0mPDIfCGQ

50. LEED - Leadership in Energy and Environmental Design

51. Cardinals are Green too!

52. Photo Scavenger Hunt DO –Think of a green element that addresses each building basic. –Get me to sign your pass –Take a picture –Write your reasoning –Return back to the classroom by _____. 1 minute early and you get an extra point! DON’T –Disrupt any classes –Split up –Be late