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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?
    • Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower .
  • 3.
    • 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.
  • 4. Diagram of an HEP Dam
  • 5.  
  • 6. Case study
    • Cruachan hydro-electric power station
    • Cruachan is situated on the western side of Scotland in the Grampian mountains.
    • 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.
    • At off-peak periods water can be pumped back up to the reservoir to guarantee a constant fuel source.
    • High cloud cover means there is little water loss by evaporation.
    • 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.
    • A corrie on the side of Ben Cruachan acts as a reservoir.
    • Corrie is dammed by a concrete barrage 316m long and 46m high
    • Steep U-shaped valley provides a height of 364m to the machine hall. This supplies the energy to generate the electricity.
  • 7. Advantages
    • Hydro-electricity is renewable and is often produced in highland areas
    • Population is sparse.
    • It is a relatively cheap form of power
    • Creates only limited pollution.
    • Dams built to store water for HEP production can also reduce risks of flooding and water shortages.
  • 8. Disadvantages
    • Dams are very expensive to build.
    • Large areas of farmland and wildlife habitats may have to be flooded forcing people and animals to move.
    • Unsightly pylons can cause visual pollution
    • the possibility of the dam collapsing.
    • Silt, previously spread out over farmland, will be deposited in the lake.
    • decaying vegetation can release methane and carbon dioxide - two greenhouse gases.

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