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Different forms of power production - advantages and disadvantages.

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Introduction

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How it works?

A power station works byusing movement energy to turn aturbine to work a generator. The turbines contain steam to turn them. These turbines turn to drive the generators to produce electricity.

Steam is used to drive turbines, which is known as convectional, by burning fuel. This fuel is coal, oil, peat or wood. Large amounts of water is needed to condense the steam, mainly in coal fired powered stations. At the end of the turbine turning and making the generator run, only one third of the energy from the fuel is changed into electrical energy, which is finally delivered to our homes. The chemical energy of the fuel is changed into the heat energy of the water is changed into the kinetic energy of turbines, which is finally changed into the electrical energy of the generator.

Advantage

The power stations are cheap to build and can make electricity at any time.

Disadvantage

Burning fuel releases carbon dioxide- this increases global warming.

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How it works?

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Middle

Advantage

While the wind blows the energy is free.

Disadvantage

The amount of electricity can vary depending on the strength of the wind, which can vary.

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How it works?

Geothermal energy is a form of renewable energy derived from heat deep in the earth’s crust. This heat is brought to the near surface by thermal conduction and by intrusion into the earth's crust of molten magma originating from great depth. As groundwater is heated, geothermal energy is produced in the form of hot water and steam. The heated groundwater can be used for direct heating of homes and greenhouses, for vegetable drying, and for a number of other uses. These are known as direct uses of geothermal energy.  The energy is changed at various stages; the heat energy from the rocks is changed into the heat energy of the water, which is then changed into the kinetic energy of the turbines, which is finally turned into electrical energy of the generator.

Advantage

The energy is free and it is available day and night.

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Conclusion

Advantages

Very good for producing energy in difficult to reach places.

Disadvantages

Not very efficient- lots of energy is wasted

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How it works?

A nuclear power plant operates basically the same way as a fossil fuel plant, with one difference: the source of heat.  The process that produces the heat in a nuclear plant is the splitting of uranium atoms.  That heat boils water to make the steam that turns the turbine-generator, just as in a fossil fuel plant.  The part of the plant where the heat is produced is called the reactor core.

Advantages

Can produce electricity at any time.

Disadvantages

If there is an accident, a large amount of dangerous radioactive material can escape into the atmosphere and seriously harm people over a very wide area.

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