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

Alternative Power Sources.

Extracts from this document...


Alternative Power Sources Essay

The problem with fossil fuels is that they can not be used again this makes them nonrenewable they also use the earth’s valuable resources and are destroying the ozone layer. The factories where they are made take up a lot of land space, they also look dirty and produce a lot of pollution this destroys the wildlife around them. There are other much cleaner ways to get power you don’t just have to use fossil fuels this essay will explore these alternative ways.

Wave power or tidal power

This is made from a force taking the energy from a waves horizontal velocity and the energy stored in the peaks of a wave which is then converted into useful power forms. The wave’s energy comes from the sun. The sun’s rays are absorbs by the earth’s surface, and cause heating of the adjacent air, which then rises the rising of warm air and the cooler air replacing it generates winds. These winds travel across the sea, which causes friction between the air and the sea this, disturbs the surface of the sea and produces the waves.

...read more.


Solar Energy

Is produced in the sun as a result of nuclear fusion reactions. It’s transmitted through space by electromagnetic radiation in quanta of energy called photons, which interact with the Earth’s atmosphere and surface. Passive solar systems capture and use solar energy without the aid of mechanical or electrical devices. Most buildings can be regarded as simple passive solar systems, taking advantage of direct gains of solar radiation through windows or skylights. As the solar radiation strikes floors, walls, and other objects within the room it is converted to heat. A good building design will use this to advantage so the house will remain warmer though out the winter and summer periods. The only commercial power stations in use to day are the solar Electric Generating systems located in California. These trap the sun’s energy into a tube containing heat transfer fluid the fluid is raised to very high temperatures to make superheated steam.


Hydro-power is made by the fall of water from a higher to a lower level. Hydro-power is extracted from waterwheels or hydraulic turbines and is a natural source. Hydro-power is available from any where, where there is a steady flow of water.

...read more.


The water then enters the turbines and leaves them through the tailrace. The power generators are mounted directly above the turbines on vertical shafts. The design of turbines depends on the available head of water, with Francis turbines used for high heads and propeller-turbines used for low heads. Canada gets about 60% of their power from hydroelectric power. The world gets about a quarter of its power from hydroelectric sources. The leading countries are Norway 99% and Brazil 96%. Hydropower accounts for about 85% of the renewable energy sources in Europe. By 2010 the amount of hydro power used is hoped to increase from 165 to 185 billion kWh per year.

The are some advantages of using Hydro power the first and most obvious is that its clean for the environment and is a renewable energy source. It also provides Jobs workers will need to build dams. The disadvantages are that in the hotter countries such as Kenya where there is not much rain it may be harder to use such a power supply that depends on water.

In conclusion there are many different energy sources instead of fossil fuels that are a lot cleaner as well. You may be asking why don’t we use more of them this is simply because fossil fuels are much easier to produce.

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism 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 GCSE Electricity and Magnetism essays

  1. Factors Affecting the Efficiency of a Wind Turbine

    Seven factors that were thought to be affecting the efficiency of wind turbines were chosen and these are: - 1. Wind Speed 2. Temperature of air 3. Load 4. Blade length 5. Blade shape 6. Number of Blades 7. Angle of blades cutting through the wind Variables listed above were

  2. Wind Power.

    The physics behind these will be discussed later. 8) Trade winds in the subtropics, and the channeled wind through mountain passes are especially beneficial to windmills. Once a suitable location is found, the wind is analyzed extensively, and the criteria is met, there are still more requisites. 1) The terrain upon which the windmills are built must be relatively flat.

  1. Chessington World of Adventure.

    It has three trains with seven carriages per train and four riders per carriage. The working of the vampire apart from the help of gravity is based on the interconversion of potential energy to kinetic energy and vice versa at various stages of the ride.

  2. Identifying the science involved in nuclear fusion and is it the energy for the ...

    250 kilograms of Helium In conclusion of the previous table above, Fusion power would be the best source of energy to use in terms of harmful greenhouse gas emissions. Another attractive feature of this type of fusion power is of it's safety handling as there wouldn't be any chance of tragic events happening such as nuclear meltdowns.

  1. Energy Essay

    Basically what happens is as follows: U + N --> X + Y +ZN1 But however this is not all that takes place in a reaction, because moderates are required to control the rate of reactions as well as the critical mass needs to be taken in account.

  2. Renewable and non-renewable fuels

    The current produced in the UK power stations is alternating current AC, the advantage of this is that AC power can be converted by passing it through electrical transformers and have its voltage increased and consequently its current reduced, this means that the cables required for the national grid system

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