1. REVIEW

2. RENEWABLE ENERGY 2

3. Do we need other types of energy sources?

4. Non-Renewable Energy
Non renewable
Energy that cannot be made again by nature in a short period of time.

5. So what is a GOOD alternative to Non-Renewable Energy?

6. Renewable
Energy
Renewable Energy
Energy that can be remade often by nature in a short period of time.
Ocean

7. Renewable Energy Types
Hydro
Solar
Biomass
Geothermal
Wind
Ocean

8. Motion Sources (Kinetic Energy)
Hydro
Wind
Ocean
Wave
Current/Tides

9. Heat Sources (Thermal Energy)
Solar
Biomass
Geothermal
Ocean
Thermal

10. Renewable Energies are Sustainable Resources
Means nature can remake, or sustain, them.
So, if we work with nature to sustain it, we will ALWAYS have a means of living.

11. Today’s World
Early Hawaiians relied on water as one of the main sources to sustain life.
Today we rely on electricity to sustain life. What types of renewable energy sources can we use now to sustain life?

12. Possible Renewable Energy by Island
Lanai
Molokai
Maui
Kauai
Oahu
Hawaii
Ocean
Hydro
Geothermal
Biomass
Solar
Wind
Source: “A Catalog of Potential Sites for Renewable Energy in Hawaii” by Global Energy Concepts, LLC, Dec. 2006

13. List the types of RENEWABLE Energy Sources available in HAWAII4. 5. 6.

14. Wind Energy

15. What is Wind?
Moving Air!
AIR

16. How is Wind Made? Earth heated by sun
Land heats up faster than ocean (daytime)
Land air rises while ocean air replaces it
Moving Air….Therefore WIND!!

17. Can We Catch Wind?

18. Many People Have!
5000 yrs ago
Egypt --Nile
500 AD
Persia (Iran)

19. 850 AD
Polynesians to HI Islands
1300
Holland

20. Wind turbines (electricity)
1880
U.S. (grind meal,
pump water,
cut wood)
1920
U.S. (electricity)
Now
Wind turbines (electricity)

21. Wind in Hawaii? Lanai Molokai Maui Kauai Oahu Hawaii Ocean Hydro
Geothermal
Biomass
Solar
Wind
Source: “A Catalog of Potential Sites for Renewable Energy in Hawaii” by Global Energy Concepts, LLC, Dec. 2006

22. Wind
Turbines

23. What is a Wind Turbine? Machine that “catches” wind with blades
Uses wind’s kinetic energy to create electricity

24. Activity – Windy Campus
Split into 3 groups led by teacher, tech & hmrm teacher
Each group
Equipment
Campus map (each group assigned section of campus & altitude, ie ground, 2nd flr, field, middle of buildings)
Anemometer
Wind turbine
Multimeter
Take equipment & find max wind spot w/in area using anemometer. Record spot on map, wind direction & speed.
Place turbine at spot and record time, voltage (V) & current (I).
Repeat measurements 2 more times at 2-5 minute intervals.
Return to classroom
Calc turbine power (V x I), graph power vs. time, how many turbines needed to operate household items
Class discussion
Best place on campus
Pros & cons of placing real turbine at the various spots

27. Wind Tower
How Does It Work?

28. How Much Energy Can We Get?
The BIGGER they are,
the MORE WIND they catch!
Small  <100 kW
Large  ~5 MW
(Typical home in Hawaii uses 600 kW per hour)
(Microwave can use 900 W)

29. Where Do We Put Them? More wind at higher altitudes & open areas
SO……. Tops of smooth rounded hills
Open plains
Shorelines
Mountain gaps

30. Wind Farm
Renewable
Energy
A Wind Farm is many wind turbines grouped together to generate bulk electrical power.
Kamaoa Wind Farm
South Point, Hawaii

31. Lalamilo Wind Farm South Kohala, Hawaii
Hawi Wind Farm
Hawi, Hawaii
Lalamilo Wind Farm South Kohala, Hawaii
Wind farm construction video of some sort
Kaheawa Wind Farm
Kaheawa, Maui

32. Small Turbines Where to put them House Building roof Pole
Saunders Hall
UH Manoa
Ideally put at least 33 ft (10m) above & 250 ft (76m) away from obstructions

33. The Good, the bad & the ugly
Clean fuel
No air pollution
No water pollution

34. the good, The Bad & the ugly
Wind doesn’t blow all the time
Noise
Visual
Visual – blocks view—casts shadow

35. the good, the bad & The Ugly
Wildlife
Environment (construction)
Wind Turbine Destruction
Wind Turbine Fire in Germany
Wildlife birds

36. Other Possible Wind Sources?
Hurricanes
Wind – 1,500,000,000 kW
½ of electrical energy produced worldwide!
Tornados or funnel clouds
How do we catch it?