Physics ProjectEnergy

Group Members4A

Cheng Hei Shun (7)Szeto Pui Yiu (32)Tam Shun Yiu (33)Wong Chi Ho (37)

Wong Tak Hong (40) Next

Content

1. Energy Investigation-Geothermal Energy-Solar Energy

2. Global Trend-Consumption of fuel-Fuel reserve

3. Energy Conservation

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Energy InvestigationGeothermal Energy (1)

Rocks in mantle heat up the underground water.

This super-heated water is sometimes be used to produce electricity.

The energy produced in this way is called Geothermal energy.

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Energy InvestigationGeothermal Energy (2)

Geothermal energy contributes only a little amount of energy supply to world. But it is widely used in countries where active vulcanicity occurs, for example New Zealand and Mexico.

Geothermal energy can be used to generate electricity in geothermal power plants or for energy saving non-electrical purposes.

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Energy InvestigationGeothermal Energy (3)

Advantages--clean

--little pollution only

--reliable

--abundant supply

--easy to use

--only small pieces of land are required

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Energy InvestigationSolar Energy (1)

Solar Energy is the energy from the sun. It is usually in the form of heat and light energy. The Solar panel receives the solar energy and can turn water to steam to generate electricity.

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Energy InvestigationSolar Energy (2)

Solar energy is commonly used in some developed countries, such as USA.

A good example is shown inside the Hong Kong Bank Headquarter. Sunlight is directly used for lighting inside the building.

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Energy InvestigationSolar Energy (3)

Advantages--solar panels are cheap and easy to erect

--little pollution

--clean

--inexhaustible

--easy to get

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Global Trend inConsumption of Fuel (1)

Let’s see the global trend in fuel consumption in the past years.

The previous diagram show that our demand of energy is increasing rapidly.

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Global Trend inConsumption of Fuel (2)

Let’s see the consumption of fossil fuel.

Petroleum (oil) is a main source of energy. However, it is limited on earth, and will be exhausted on one day in the near future.

Facing the energy crisis, although the scientists have discovered some new sources of energy, actions on saving energy are very important.

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Global Trend inFuel Reserve (1)

Oil ReservesNatural Gas

Reserves

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Global Trend inFuel Reserve (2)

Estimated remaining lives of fuels:

Coal: yrsOil: yrsNatural Gas: yrs

Coal Reserve

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Global Trend inFuel Reserve (3)

Oil in North Sea Oil in Alaska

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Energy Conservation (1)Importance--Energy is limited in the world

--As population grows, the demand of energy will increase

--Fossil fuel causes pollution problems

--Some kinds of energy, for example, nuclear energy, is quite dangerous

We must find some more kinds of clean energy;Start doing actions on conservation of energy

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Energy Conservation (2)

Method--Reduce consuming of oil and electricity--Turn off the light when you leave

--Develop alternative renewable energy resources,

such as geothermal energy

--Use the energy resources efficiently

--Use the energy-saving electrical appliances

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THE ENDHope you have understood

more about energy!

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