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The image illustrates a hydroelectric power station diagram, where a river flows into a high-level reservoir through a dam. An intake is open during the day and closed at night, regulating the flow of water to reversible turbines. In the daytime, the turbines operate a generator to produce electricity, which then flows through power lines to the national grid. At night, water is pumped back into the high-level reservoir. The power station is depicted as a building housing the generator and turbines, with an arrow indicating the flow of water during the day (downwards) and night (upwards) between the high and low-level reservoirs.
Given the complexity of the image, the above description may not be entirely accurate.
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The graph illustrates the electrical energy generated by the hydroelectric power station.
Overall, generating electric energy is a cyclical process and contains a series of steps. Firstly, storing water at the high-level reservoir, flowing water into the low-level reservoir, powering the generator, and lastly sending the water uphill for reuse.
Initially, water from the river flows to the high-level reservoir at the dam. The intake of the dam opens during the day and closes at night; the water then moves downhill creating electricity for the power station. After that, the reversible turbines rotate their blades to power the generator so it can operate, and then the generator produces electricity that gets sent off to the national grid through the power lines
Meanwhile, the process at night is the opposite. Water from the low-level reservoir gets pumped up by the reversible turbines in the power station towards the high-level reservoir for reuse.
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