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Question 2 (15+10=25) a) By considering the ratio of the areas Ao and A1 of Fig. 8.5, show that the optimum power extraction (according to

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Question 2 (15+10=25) a) By considering the ratio of the areas Ao and A1 of Fig. 8.5, show that the optimum power extraction (according to linear momentum theory) per unit of area Ao is 8/9 of the incident power in the wind. b) Prove that the torque produced by a wind turbine rotor of radius R can be expressed as C, Ru T= 2 2

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