2. Energy: Powering Society

3. Classification of Natural Resources by Availability Reserve - We know it exists and it can be extracted with existing technology Resource - Known or believed to exist but not exploitable today (for economic, political of technological reasons) 1 trillion- 2.3 trillion barrels

4. Classification of Natural Resources by how it is produced Renewable - Resource that is created as fast as it it consumed. Nonrenewable - Resource that is created slowly - consumed faster than it forms. Fossil fuels, metals, nuclear power, etc. Trees, fish, sunlight, wind, etc.

5. Review: Energy Units Joule (J) = Energy needed to lift 1 kg weight by 0.1 meter (about the energy to lift an apple over your head) calorie (cal) = Energy needed to heat 1 g water by 1°C (Note” Calories (Cal) in food are equal to 1000 calories (cal) British Thermal Unit (BTU) = Energy needed to heat 1 pound of water 1°F (1 BTU = 950 Joules)

6. Review: Power Rate of energy use Watt (Joule/second) Kilowatt-Hour (kwh) =1000 watts per hour Centralia Coal Power Plant = 1,330 Megawatts

7. Review: Laws of Nature Conservation of Matter 1st Law of Thermodynamics (Conservation of Energy) 2nd Law of Thermodynamics (Entropy)

8. Energy Resources: History Slave Labor Animal Labor

9. Energy Resources : History Wood Wind/Water

10. Energy Resources : History Coal Oil

11. World Fuel Consumption (1800 to1990 & …) Consumption (Millions of metric tons of oil equivalent) 180019001990 4001,90030,000

12. U.S. Energy Use 2.76 x 10 13 kwh/yr (about 100,000 kwh/person/yr)

13. U.S. Energy Use Industrial

14. U.S. Energy Use Transportation

15. U.S. Energy Use Commercial/Residential

16. U.S. Energy Use Consumption Measured in quadrillions (10 15 ) BTU November 2005 % Change over November 2004 Petroleum3.34 Natural Gas1.83-6.7 Coal1.82-0.7 Hydro0.21-8.1 Nuclear0.626.7 Total8.09-2.1 Note: There is a 6 month delay on energy data

17. U.S. & the World

18. Primary Energy is Converted into More Usable forms: Secondary Energy Primary Oil, Coal, Solar Secondary Electricity

19. Steam Engine & Internal Combustion Engine

20. Secondary Energy: Electricity Magnet Electricity

21. The “Grid”

22. Energy is lost… …but electricity is versatile.