Wind energy question #1 Q1) Wind at 1 standard atmospheric pressure and 15°C temperature has a velocity of 5 m/sec what the total power density in the wind stream? Choose the correct answer (76 w/m?, 15.25 w/m?, 3 w/m?) Q2) A. The anemometer is advice to measure the always recommended to set up on the height of B. The maximum power from wind power from wind stream by wind rotor is Itcal ......... Coefficient C. Savonius rotor s classify as ............. wind turbine Q3) How wind turbine classified ? Discuss with brief. Q4) Write short notes on applications of wind energy. Wind energy question #2 Q1) 1. If the mechanical and electrical efficiency about 70% and with consideration of Betz coefficient the total out power from wind power system . 2. Darrieus rotor is consider as . axies wind turbine, 3. The wind speed measure by the............. which recommended to set up on m height. Q2) What the power density in the wind stream of standard atmospheric pressure and 19°C temperature has a velocity of 8 m/sec .Choose the correct answer (5 w/m?, 39 w/m?,

Wind energy question #1 Q1) Wind at 1 standard atmospheric pressure and 15°C temperature has a velocity of 5 m/sec what the total power density in the wind stream? Choose the correct answer (76 w/m?, 15.25 w/m?, 3 w/m?) Q2) A. The anemometer is advice to measure the always recommended to set up on the height of B. The maximum power from wind power from wind stream by wind rotor is Itcal ......... Coefficient C. Savonius rotor s classify as ............. wind turbine Q3) How wind turbine classified ? Discuss with brief. Q4) Write short notes on applications of wind energy. Wind energy question #2 Q1) 1. If the mechanical and electrical efficiency about 70% and with consideration of Betz coefficient the total out power from wind power system . 2. Darrieus rotor is consider as . axies wind turbine, 3. The wind speed measure by the............. which recommended to set up on m height. Q2) What the power density in the wind stream of standard atmospheric pressure and 19°C temperature has a velocity of 8 m/sec .Choose the correct answer (5 w/m?, 39 w/m?, 312 w/m?). Q3) Describe with a neat sketch the working of a wind energy system with the main components. Q4) Renewable energy has advantage and disadvantage write two for cach. Wind energy question #3 Q1) What the main difference between vertical and horizontal axis? Discuss with brief. Q2) 1 the sweptar ofthe wind roor increas the wind power dcrease through rotor . (True or False) 2. The aerodynamic performance of wind turbine blades important to improve the wind turbine performance. (True or False) 3. The height of ten meters is the standard of anemometer set-up. (True or False) Q3) Nowadays the electricity the main application of wind power system write the main components of WPS. Q4) The air density of wind stream at standard atmospheric condition is 1.22 kg/m’ If the wind velocity is 6 m/sec what the total power through swept area of wind rotor is 5 m? . Choose the correct answer ( 659 w, 111w, I8 w). Q) Calculate the total annually power density and the maximum obtainable power for rotor area of 5 m’. f the annual wind speed recorded are vary from (0 - 20 m/sec). The frequencies of these speeds are listed in the table (1).