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Rotating component of an electrical machine.
The rotor diameter describes the diameter of the circle that is swept by the blades of a wind turbine. As a rule of thumb, doubled rotor diameter quadruples the wind turbines rated power output.
A parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground; in the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero.
ratio between standard deviation and correlation
remote terminal unit
Refers to a type of small hydropower plant which has little or no water storage