Types of energy resourcesEnergy Resources

Renewable energyE ner gy pr oduced us ing f uel r esour ces

t hat don' t r un out , orquick ly r enew t hr ough nat ur al pr ocesses

Non- renewable energyE ner gy pr oduced us ing f uel r esour ces t hat

r un out some days

Solar energy

Wind power

H.E.P. Geothermal power

Wave

energy

Oil

Coal

Natural gas

Nuclear power

Wood

• Hong Kong Energy End-use data

• Innovative Energy Efficient Equipment Pilot Programme for Government Buildings

• Save energy in your home

• 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

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.

Advantages of solar energy

a renewable energy resourceabundant in regions with hot, dry climatepollution-freelow operational costscan be generated on a small scale for domestic use

spatially confined to certain regions (30N & S)technical problems in large scale development of solar energyhigh construction costs of solar panels

Disadvantages of solar energy

• 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

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.

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.

• 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.

Limitation of using wind power

• It is not windy all year long.

• Wind farms give a negative visual impact.

• Wind speeds must be high to turn the turbines fast enough to generate electricity.

• 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

Can we use H.E.P. in Hong Kong ?

Locational requirements for dam construction• http://www.nationalgeographic.com/geoguide/dams/index.html

• 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.

http://www.nationalgeographic.com/geoguide/dams/index.html

Animals and plants lived millions of years ago in shallow seas and lakes

When the animals and plants died, they sank to the sea bed. There they were mixed with and covered by sand and mud.

After a long time, the plants and animals rotted. Oil formed and passes into the porous rocks. Impermeable rocks stopped the soil from escaping.

• 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.

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).

• Global warming• Forest destruction

– loss of biodiversity– species extinction

• Oil leakage results in– toxic contamination of

rivers, streams and soil

Use alternative energy resources

Use energy-saving machines and carsuse 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

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

Slide show

http://www.energyed.ecw.org/acrobat/renewablecolor.pdf

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

Wind power is a type of renewable

energy resources

Try again!

Tidal power is a type of renewable

energy resources

Try again!

Hydro-electric power is a type of renewable

energy resources

Try again!

Good !

Next

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

Try again!

Next

Question 3

Which of the following correctly shows the relationship between the level of economic development and the rate of oil consumption ?

Level of economic development

Rate of oil consum

ption

A.

Level of economic development

Rate of oil consum

ption

Level of economic development

Rate of oil consum

ption

Level of economic development

Rate of oil consum

ption

C.B. D.

There is a positive relationship between the level of economic development and the

rate of oil consumption

Try again!

Very Good !

Next

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

Work Hard and

Try again!

Next

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

Try again!

Well Done !Take a break !