You are an engineer in a wind turbine company and you are told to install an offshore wind park which delivers around 280 GWh/year. The available turbines have the following specifications: P= 1.9 MW (Nominal power); d+=92.8m (Rotor diameter); U = 5 (Cut in wind speed); Uo = 20 (Cut out wind speed); Cp = 0.27 EG=0.96 EK = 0.92 Pair = 1.205 2.1 How many of these turbines do you need to generate the requested amount of energy? Assume that the load factor of the turbines is 0.35. (Round to the next higher number of turbines!) . Annual energy production of 1 turbine: Number of turbines for the wind park: 2.2 Determine the nominal mechanical power for the turbine. . (Power extraction coefficient); (Generator efficiency); (Gearbox efficiency); (Density of air); 2.3 Determine the nominal wind power. 2.4. Determine the nominal wind speed. 2.5. How much energy could be generated annually by the wind park if you assume that the turbines used for this exercise are ideal propellers? (Assume that you still loose energy due to non-idealities of gearbox and generator. The load factor is again 0.35.). Note: ideal propellers Cp=0.59