How does a rotating turbine power a generator
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How does a rotating turbine power a generator

[From: ] [author: ] [Date: 12-12-08] [Hit: ]
Please give me the 10 points for best answer!!......

A formula for mechanical power is:
Power_W = (torque_N.m x 2pi x RPM) / 60

The turbine extracts power from the wind, and converts it to mechanical rotational power. A formula for power provided by the wind (not the turbine):
Power_W = 0.5 x AreaSweptByRotor_m^2 x Air Density_kg/m^3 x Velocity_m/s^3

Note that the wind velocity is very important. Doubling the speed of the wind give 8 times more power (proportional to the cube of wind speed). Halving the wind speed gives 1/8 the power. Air density is approx. 1.23 kg/m^3. The power from the turbine is less than this as it cannot be 100% efficient.

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Turbines are similar to an engine starter. They have a number of brushes on the inside that make contact to the inside walls. As they spin inside a magnetic field they generate a current which is sent to a storage facility (usually batteries) to be used later.

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It's mechanically connected. The rotating turbine turns the generator. usually they are on the same shaft, but they can be connected via gears.

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a rotating turbine can be set up as an electrical generator. the rotating part is put in the middle of a magnetic field.

Please give me the 10 points for best answer!!
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