Determine the input torque provided by a 100 m diameter rotor assembly to produce an instantaneous power output of 3.2 MW at 20 RPM for a direct drive wind turbine generator system.
What will be an ideal response?
The equation that relates power, torque, and RPM is Instantaneous power (PI) [W] = (Torque [N-m] x RPM)/9.5488.
Rearranging the variables for input torque; Torque [N-m] = 3,200,000 [W](9.5488)/20 RPM = 1,527,808 N-m. The input torque supplied by the wind flowing over the rotor assembly would be 1,527,808 N-m or 1,126,853 ft-lbs
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