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Which of the following type of turbine or the rotor requires relatively low velocity winds for operation?

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in Energy Engineering by (91.0k points)
Which of the following type of turbine or the rotor requires relatively low velocity winds for operation?

(a) Cup anemometer

(b) Savonius rotor

(c) Darrieus type rotor

(d) Magnus effect rotor

The question was asked at a job interview.

Enquiry is from Vertical Axis Wind Mill in section Wind Energy of Energy Engineering

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Correct answer is (b) Savonius rotor

The best explanation: Savonius rotor is a simple WEC system which woks like a cup anemometer. This type was invented by S.J. Savonius in the year 1920. It requires relatively low velocity winds for operation. It consists of two half cylinders facing opposite directions forming as S-shaped cross section.

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