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The image displays a labeled diagram of the structure and operation of a hydroelectric power station, including a dam with a high-level reservoir feeding into reversible turbines that operate as a generator during the day and pump water into the high-level reservoir at night; the turbine connects to a power station that produces electricity for the national grid, and there is also a low-level reservoir beneath the power station; a specific part is labeled as intake (Day: open, Night: closed). There are no numerical data points or percentages.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram illustrates the process of electricity generation in a hydroelectric power station.
Initally, the process consists of two main stages, with electricity being generated during the day, while at night water is pumped back to the upper reservoir for reuse.
During the day, water passes through the dam when the intake is open and flows down through pipes. As the water flows, the turbines are driven, which enables electricity to be generated. Afterwards, the electricity is transmitted to the national grid. Finally, the water flows into a low-level reservoir.
However, at night, the process is reversed. The intake is closed, and water is pumped from the low-level reservoir back to the high-level reservoir using reversible turbines. In contrast to the daytime process, water flows in the opposite direction during this stage.
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