Q2. A horizontal axis wind turbine with rotor radius r = 10 m, hub height Huub = 20 m is installed in two different site

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Q2 A Horizontal Axis Wind Turbine With Rotor Radius R 10 M Hub Height Huub 20 M Is Installed In Two Different Site 1 (86.49 KiB) Viewed 46 times

Q2. A horizontal axis wind turbine with rotor radius r = 10 m, hub height Huub = 20 m is installed in two different sites (site A and site B). Both sites have the same average wind speed Vo = 9 m/s. The wind speed is measured at a reference height Ho = 50 m. Site A is an open meadow and site B is a suburban area. Assuming the rotor's power coefficient Cp = 0.3, the overall efficiency of the wind turbine is 90% and air density for both sites p = 1.225 kg/m3. 1. Calculate the wind turbine output in the two sites. (10 marks) 2. In case of strong winds, it is necessary to remove part of the excess energy of the turbine to avoid damaging the turbine. It is necessary to modify the radius and height of the wind turbine to install in site C, which is an offshore area. What is the most suitable power control method for this new wind turbine in site C? Draw a power curve of the wind turbine in site C under this power control method. The horizontal axis of the power curve should include cut-in, rated and cut-out wind speed ranges. (12 marks) 3. Testing showed that noise levels are too high for the wind turbine in site C. In no more than 100 words, propose three changes to rectify this issue. (12 marks)