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Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
Hydroelectric Power V2
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Hydroelectric Power V2

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  • 1. Hydroelectric Power
  • 2. What is it? <ul><li>Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower . </li></ul>
  • 3. <ul><li>The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity…this can be seen in the following diagram. </li></ul>
  • 4. Diagram of an HEP Dam
  • 5. &nbsp;
  • 6. Case study <ul><li>Cruachan hydro-electric power station </li></ul><ul><li>Cruachan is situated on the western side of Scotland in the Grampian mountains. </li></ul><ul><li>Rainfall is over 2,500mm per annum and is evenly distributed throughout the year. Reservoir is kept at a high level and there is always enough water to turn the turbines. </li></ul><ul><li>At off-peak periods water can be pumped back up to the reservoir to guarantee a constant fuel source. </li></ul><ul><li>High cloud cover means there is little water loss by evaporation. </li></ul><ul><li>The impermeable slate rock in the area gives a high surface run off to fill the reservoir with water and means the water does not soak away through the rocks. </li></ul><ul><li>A corrie on the side of Ben Cruachan acts as a reservoir. </li></ul><ul><li>Corrie is dammed by a concrete barrage 316m long and 46m high </li></ul><ul><li>Steep U-shaped valley provides a height of 364m to the machine hall. This supplies the energy to generate the electricity. </li></ul>
  • 7. Advantages <ul><li>Hydro-electricity is renewable and is often produced in highland areas </li></ul><ul><li>Population is sparse. </li></ul><ul><li>It is a relatively cheap form of power </li></ul><ul><li>Creates only limited pollution. </li></ul><ul><li>Dams built to store water for HEP production can also reduce risks of flooding and water shortages. </li></ul>
  • 8. Disadvantages <ul><li>Dams are very expensive to build. </li></ul><ul><li>Large areas of farmland and wildlife habitats may have to be flooded forcing people and animals to move. </li></ul><ul><li>Unsightly pylons can cause visual pollution </li></ul><ul><li>the possibility of the dam collapsing. </li></ul><ul><li>Silt, previously spread out over farmland, will be deposited in the lake. </li></ul><ul><li>decaying vegetation can release methane and carbon dioxide - two greenhouse gases. </li></ul>

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