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The image illustrates a hydroelectric power station diagram featuring a high-level reservoir leading to a dam, from which water descends through an intake (day: open, night: closed) into a penstock toward power station turbines labeled as reversible turbines, describing a day-night operational mechanism; during the day, these turbines generate power, whereas at night, they pump water back into the high-level reservoir. Post-turbine, water flows into a low-level reservoir connected to the power station which links electricity to power lines feeding the national grid. The diagram specifies various structural components, including pipelines, generating and pumping processes, directions of water flow, and positions within the power station, highlighting dual functionality within the system's design.
Given the complexity of the image, the above description may not be entirely accurate.
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The illustration depicts the way of generating electricity in a hydroelectric power station.
At first glance, it is noticeable that the water flows through turbines during the day, that is why the generator is able to make electricity. In contrast during the night everything is reverse.
When it is day, the high-level resevoir opens its intake, then the flow of water is able to generate electricity. However, during the night the direction of the flow is completely reverse and the intake is closed as well. Therefore, at night no electricity will be generated. When it is day, the turbines work as an operator, which makes electricity, then this electricity will be guided through powerlines first and then national grid. After going through the turbines the water flows in the low-level reservoir. During the night again the operation is wholely in different direction, this time the water from the low-level reservoir flow through turbines. Moreover, the turbine pumps water into the high reservoir.
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