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Actually, most power stations reduce their output at night when demand for electricity is lower. Many types of power plant need to be kept running through the night, however, even if they are not really producing that much electricity. The reason is that it can take more than a day for a very large power plant, started from dead cold, to come up to operating temperature. So very large plants (typically nuclear or coal-fired) are simply throttled back at night, throttled up during the day, and shut down as infrequently as possible.

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16y ago
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14y ago

Power stations must be able to produce power for the maximum power that a given area will use. If an area of service uses 1000KWH average but a surge of 25000 KWHs the area must generate that high amount at all times.

Alternative energy makes these variances larger because most alternative energy is wind or sun dependent.

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14y ago

Could be the effect of the cooling water temperature being higher in summer, this makes the steam cycle less efficient-but this would apply to coal fired plants as well. Or it could just be that the power needed for the grid is higher in winter, so the plant is run harder then.

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Q: Why do nuclear power stations produce more energy in winter than summer?
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