A large commercial wind turbine has a blade span of 100 m and tower (4 m diameter uniform) height of 150 m high (hub height above the ground). If the combined turbine-generator efficiency of 40%, wind speed of 15 km/h and the air density 1.2 kg/m3 (disregard frictional effects on the mast) determine the following:a) Electrical power generated by the turbine (in MW).b) Total horizontal force (kN) exerted by the wind on the supporting mast of the turbine and the distance (m) of this resultant force from the ground. Assume uniform tower diameter throughout the height.c) What will be the electrical power generated (in MW) when the wind speed is 30 km/h

Take the density of air to be 1.25 kg/m³, and disregard fric- 13-42 Commercially available large wind turbines have blade span diameters larger than 100 m and generate over 3 MW of electric power at peak design conditions. Consider a wind turbine with a 60-m blade span subjected to 30-km/h steady winds. If the combined turbine-generator exerted by the wind on the supporting mast of the turbine. power generated by the turbine and (b) the horizontal force efficiency of the wind turbine is 32 percent, determine (a) the tional effects on mast. 30 km/h 60 m FIGURE P13-42

1.The wind turbine gives the following data: Blade length, 1 = 52 m, Wind speed, V= 12 m/s, Air density, wind and power available in the rotor. = 1.23 kg/m³, Power Coefficient, C,= 0.4, Calculate the power in the 2.A Site evaluated for a wind farm is observed to have steady winds at a speed of 8.5m/s. Determine the wind energy (a) per unit mass, (b) For a mass of 10 kg and (c) For a flow rate of 1154 kg/s of air. 3.The nominal power of the wind turbine is 3MW at wind speed 11.5m/s, generator efficiency is 94%, gear box efficiency is 0.75, power coefficient of blades is 0.59. What would be the diameter of the rotor?