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Energy resources

Energy resources. Wave energy. Wind power. Oil. Wood. Solar energy. H.E.P. Coal. Geothermal power. Natural gas. Nuclear power. Types of energy resources. Energy reources in Hong Kong. Hong Kong Energy End-use data

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Energy resources

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  1. Energy resources

  2. Wave energy Wind power Oil Wood Solar energy H.E.P. Coal Geothermal power Natural gas Nuclear power Types of energy resources

  3. Energy reources in Hong Kong • Hong Kong Energy End-use data • Innovative Energy Efficient Equipment Pilot Programme for Government Buildings • Save energy in your home

  4. We can change the sunlight to electricity by using solar photovoltaic cells. They are called "PVs" or "PV cells" for short. Photo means light and "voltaic" is a word for electricity. • Electrical energy from solar cells can be used directly in a home. PV cells are used on many small appliances, like calculators, and many large pieces of equipment like space satellites, bill boards or an emergency roadside telephone. • Some experimental cars also use PV cells. They convert sunlight directly into energy to power electric motors on the car. Http://oneworld.org/energy/etree.html

  5. Examples of using solar energy • Panels on the roof of a building, like this one on the right, contain water pipes. When the sun hits the panels and the pipes, the sunlight warms them. • That warmed water can then be used in a swimming pool.

  6. Advantages of solar energy a renewable energy resource abundant in regions with hot, dry climate pollution-free low operational costs can be generated on a small scale for domestic use

  7. Disadvantages of solar energy spatially confined to certain regions (30N & S) technical problems in large scale development of solar energy high construction costs of solar panels

  8. Blowing wind spins the blades on a wind turbine -- just like a large toy pinwheel. The spinning blades turn a generator that makes electricity. • Once electricity is made, it has to get from the wind turbines to our homes, factories and schools by the electricity transmission system. Http://oneworld.org/energy/etree.html

  9. Examples of using wind power • Farmers have been using wind energy for many years to pump water from wells using windmills like the one on the left. • In Holland, windmills have been used for centuries to pump water from low-lying areas. • Wind is also used to turn large grinding stones to grind wheat or corn, just like a water wheel is turned by water power. • Today, the wind is also used to make electricity.

  10. How effective is wind power? The turbines usually produce about 50 to 300 kilowatts of electricity each. A kilowatt is 1,000 watts (kilo means 1,000). You can light ten 100 watt light bulbs with 1,000 watts. So, a 300 kilowatt (300,000 watts) wind turbine could light up 3,000 light bulbs that use 100 watts.

  11. Current situation • In 1995, there were 13,437 wind turbines in California. These turbines are grouped together in what are called wind "farms." • About 30 percent of the world's wind-generated electricity is found in California. • Other countries that use a lot of wind energy are Denmark and Germany.

  12. Limitation of using wind power • It is not windy all year long. • Wind speeds must be high to turn • the turbines fast enough to generate • electricity. • Wind farms give a negative visual • impact.

  13. Hundreds of years ago, the moving water turned wooden wheels that then turned big, heavy stone wheels to grind flour or corn. Today, moving water is used to make electricity. • Hydroelectric power plants use water to make electricity. "Hydro" means water. Dams, usually in the mountains, are built to hold river water forming a lake behind the dam called a reservoir. • This reservoir water flows through a pipe called a penstock and into a machine called a turbine. A turbine has blades like a big fan. The water pushes against turbine blades that turn. The turbine spins around and is attached to a generator that produces electricity http://www.fwee.org/walk.html

  14. Can we use H.E.P. in Hong Kong ? Locational requirements for dam construction • http://www.nationalgeographic.com/geoguide/dams/index.html

  15. prevent floods generate power improve navigation create lakes for fishing, swimming, waterskiing, and boating. Dams prevent floodwaters from replenishing the soil downstream. It cuts the supply of alluvium. Soil fertility drops in floodplain. Forest—habitat for wild animals and plants—may be lost beneath the waters of a reservoir. Reservoir inundates people’s homes, forcing them to move elsewhere. Increased salinization as more water can evaporate from reservoir As water entering the reservoir slows down, it also drops most of the sediment it carries. Silting occurs. For / v.s. dam construction http://www.nationalgeographic.com/geoguide/dams/index.html

  16. What is oil ? How is it formed ? Animals and plants lived millions of years ago in shallow seas and lakes After a long time, the plants and animals rotted. Oil formed and passes into the porous rocks. Impermeable rocks stopped the soil from escaping. When the animals and plants died, they sank to the sea bed. There they were mixed with and covered by sand and mud.

  17. W h at is O PEC ? • The Organization of Petroleum Exporting Countries (OPEC) is a voluntary inter-governmental Organization formed in 1973. • It aims to co-ordinate and unify the petroleum policies of its Member Countries. • OPEC seeks to • ensure the stabilization of oil prices in international oil and • provide an efficient, economic and regular supply of petroleum to consuming nations.

  18. Members of the OPEC OPEC is an Organization of eleven oil producing and exporting countries, from Africa (Algeria, the Socialist People's Libyan Arab Jamahiriya and Nigeria); Asia (Indonesia); the Middle East (the Islamic Republic of Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates); and Latin America (Venezuela).

  19. What are the environmental impact of extracting oil ? • Global warming • Forest destruction • loss of biodiversity • species extinction • Oil leakage results in • toxic contamination of rivers, streams and soil

  20. Use alternative energy resources Use energy-saving machines and cars use pollution-free fuels minimize the number of private cars and provide efficient mass transit system improve building design to save energy educate citizens on energy-saving and anti-pollution What should the government do ?

  21. Switch off light, air-conditioners or heaters when they are not being used. Close the door when the air conditioning is on. Use public transport instead of private cars What should we do ?

  22. Slide show http://www.energyed.ecw.org/acrobat/renewablecolor.pdf

  23. Question 1 Which of the following types of energy resources is non-renewable ? A. wind power B. Tidal energy C. Hydro-electric power D. Nuclear power

  24. Sorry, you're wrong! Wind power is a type of renewable energy resources Try again!

  25. Sorry, you're wrong! Tidal power is a type of renewable energy resources Try again!

  26. Sorry, you're wrong! Hydro-electric power is a type of renewable energy resources Try again!

  27. Good ! Next

  28. Question 2 Which of the following countries has the largest amount of oil reserves in the world now ? A. USA B. The former USSR C. Saudi Arabia D. Iraq

  29. Sorry, you're wrong! Try again!

  30. Congradulation ! Next

  31. Rate of oil consumption Rate of oil consumption Rate of oil consumption Rate of oil consumption Level of economic development Level of economic development Level of economic development Level of economic development Question 3 Which of the following correctly shows the relationship between the level of economic development and the rate of oil consumption ? B. C. D. A.

  32. Sorry, you're wrong! There is a positive relationship between the level of economic development and the rate of oil consumption Try again!

  33. Next Very Good !

  34. Question 4 What were the effects of increasing oil prices in the 1970s? (1) high inflation (2) development of energy-saving technology (3) oil crisis (4) slow-down of industrial development in developed countries A. (1) and (2) B. (1), (3) and (4) C. (2), (3) and (4) D. All

  35. Sorry, you're wrong! Work Hard and Try again!

  36. Quite Good ! Next

  37. Question 5 Which of the followings are measures adopted by the government to conserve energy resources ? (1) control private car ownership by increasing the tax on new cars (2) develop mass transit system (3) practice careful urban planning (4) encourage the use of public transport instead of private cars A. (1) and (2) B. (1), (3) and (4) C. (2), (3) and (4) D. All

  38. Sorry, you're wrong! Try again!

  39. Well Done ! Take a break !

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