Renewable energy: Hydroelectric power

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  • Created on: 19-03-14 20:59
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Hydroelectric power
Hydroelectric power is the power generated by moving water. In electric
mountain (A hydroelectric plant in Snowdonia national park), water is collected
in a reservoir at the top of a mountain. It is then dropped through a vertical
turbine, which spun to create energy. The water was then pumped back up and
into the reservoir to be used again.
The advantages of hydroelectric energy:
· Dinorwic's six huge generators only take 16 seconds to reach full power,
using 50 tonne counter weights to pull water through their turbines. This makes
the process quite fast compared to others.
· Unlike solar or wind energy, hydroelectric energy can be controlled, meaning
it won't stop suddenly.
· Water can be let through dams steadily, resulting in a constant supply of
· After the construction of the dams, the process is carbon emission free,
making it a clean source of energy.
· The process requires no fuel at all, making it both cheap and reliable and the
water can be topped up by rainfall, a natural process.
·Hydroelectric energy is an inexhaustible energy, meaning it can never run out.
Water is a very effective way of generating electricity. The water is stored in
natural reservoirs like lakes above the power plant and is dropped down into
separate turbines and it is spun and generates energy. The water is used from a
high natural reservoir and travels through tubes and turbines and the energy
created is enough to power an entire city.
·Because the water is an all natural source, it does minimal damage to the
environment (near enough no damage at all). When the water is no longer
needed because the power is no longer being used in the city, it is pumped
back into the high natural reservoir where it cools off, ready for the next day.
·The generators that create the hydroelectric energy do not produce
greenhouse gasses so do not pollute the atmosphere.

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The disadvantages are as follows:
· Dams are expensive to build, and need to be built to a high standard, as
repairing them could be a difficult job.
· The building of large dams can cause serious geological damage. For
example, the building of the Hoover Dam in the USA triggered a number of
earth quakes and has depressed the earth's surface at its location.…read more


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