The diagram below shows how electricity is generated in a hydroelectric power station. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The given diagram shows the

process

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of generating

electricity

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in a hydroelectric power station by using natural

water

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energy

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.

Overall

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, the whole

process

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consists of four different stages and it begins with storing

water

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from the river in a

reservoir

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and culminates with delivering the

electricity

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to the national grid.

This

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process

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uses two types of intake conditions, which are

opened

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open

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in

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during

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the day and closed

in

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at

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the

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apply

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night and

requires

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require

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a number of specific pieces of equipment, including the

reservoir

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, the dam, the pump, the

turbines

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, and the generator.

First,

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the

process

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begins when the

water

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from the river, having the potential

energy

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, is stored in a high-level

reservoir

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. After that, the opened intake allows the

water

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to flow down through a pipe into the

turbines

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inside the power station during the day, which converts potential

energy

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to kinetic

energy

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. In the following stage, the

water

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rotates the

turbines

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, so that the

turbines

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operate and produce

the

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apply

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mechanical

energy

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. At the same time, the used

water

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flows into the low-level

reservoir

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. After that, the generator generates

electricity

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from

the

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apply

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mechanical

energy

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.

Finally

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, the generated

electricity

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is distributed to the national grid using power lines.

On the other hand

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, in night conditions, the

water

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from a low-level

reservoir

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is pumped into a high-level

reservoir

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when the intake is closed.