• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Renewable energy resources and their use in producing electricity.

Extracts from this document...


A renewable energy resource is one which can be extracted from the environment, and the energy source will always remain available. Examples of renewable energy sources are: > Biomass > Food > Wind > Waves > Solar > Geothermal > Flowing water The sun is the ultimate energy resource for: > Coal- because without the sun the trees would not be able to grow. > Biomass- because we use this when eat food and burn plants. Without the sun the plants and trees would not grow. > Food- because without the sun the crops would not grow. > Wind- without sunlight there would be no wind. This is because wind is caused by the sun heating different parts of the earth unequally. ...read more.


When coal is burnt, its stored chemical energy is released as heat energy. This heat energy boils water at high pressure to make superheated steam at temperatures of about 700�C. The kinetic energy in the superheated steam is used to drive turbines. These are connected to the electricity generator by large coils rotating inside a strong magnetic field. Unlike ordinary cells, solar cells do not use chemical energy. Instead they change light energy into electricity. Solar cells are known as photovoltaic (high-voltage) cells. Small solar cells power some pocket calculators. In some places, such as Antarctica, where there is no mains electricity supply, big panel containing many solar cells are sometimes used instead. ...read more.


Although wave energy would be a cheap energy resource. Geothermal energy is also a renewable energy source which is found inside the Earth. The Earth is hot due to radioactivity, hot water comes to the surface naturally in some parts of the world such as in New Zealand, but in other countries cold water is pumped down very deep holes and steam comes back to the surface. This energy process emits no greenhouse gases and is clean and efficient. The world's non-renewable energy resources such as fossil fuels are soon to run out in generations to come. We must find a way how to make more effective use of them. In power plants with coal there is only 25% efficient which means that 75% of the energy produced is wasted. The wasted energy could be used to heat nearby homes. Physics Project Easter 2003 Peter Simey 4SCW Physics ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    Pressure exerted by rock forming above (from layers of sediments formed later) and heat from deep within the earth were important in the changing of the animal and plant remains into fossil fuels such as oil, natural gas and coal.

  2. Why the Body Needs Energy? Every living cell within the ...

    out and since it forms the bottom of the chesty cavity, * The cavity then increases within the size and volume, this happens when the pressure is lower inside the chest the air is sucked in because the pressure is lower inside the body than outside.

  1. chemistry of renewable resources

    The steam that has passed through the power station's turbines has to be cooled, to condense it back into water before it can be pumped round again. This is what happens in the huge "cooling towers" seen at power stations.

  2. formation, extraction and separation of the crude oil.

    How flammable it is Gas is more flammable because all the molecules are separated and each one of them has a bit of oxygen to help it burn. Bitumen is less flammable because all the particles are together and they are hard to burn and they don't have that much oxygen to help them burn.

  1. Natural resources and renewable energy.

    In croplands, crops such as wheat and potatoes are grown in large quantities for food. Crop growth occurs naturally and may only need human aid in ensuring that the crop yields as required. Ranglands provide vast regions that are suitable for livestock breeding.

  2. In this project I am going to write about Energy Resources. This will include ...

    Coal is mostly made of carbon and has been used as part of providing heat and when machines were invented they were powered by burning coal. Coal is a heavily mined mineral. Modern machines are used to bring oil to the surface.

  1. Non renewable energy resources.

    Light oils are valuable because they contain more gasoline the most valuable product refined from petroleum. Crude oil and natural gas are called hydrocarbons because they are composed of compounds made up almost entirely of carbon and hydrogen, along with some minor impurities sulfur, nitrogen, and oxygen.

  2. The theory of relativity and its use in Sci-Fi.

    The increase in mass, however, is best understood not as a change in mass but as a change in the relationship of mass and momentum. Momentum (p) is the product of mass x velocity. Here, p' is the relativistic momentum and m is the rest mass.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work