b) Izračunati očekivanu električnu snagu vetrogeneratora Pel=Pn. Rešenje: c) Ako definišemo faktor (CF)=Proizvedena el.energija/(Pn 8760)=0,385 naći proizvedenu el. energiju Wel u toku godine. Rešenje: d) Koliki su ukupni godišnji troškovi vetrogeneratora, ako su investicioni troškovi 3 miliona NJ (životni vek 25 god., i=2%), a godišnji troškovi održavanja 0,2 miliona NJ? Rešenje: e) Kolika je cena (NJ/kWh) proizvedenog kWh električne energije na godišnjem nivou? Rešenje: f ) Naći srednju brzinu vetra na 2m od tla. Rešenje: f) Pokazati da je . Rešenje: g) Ako je gustina vazduha r=1,225 kg/m³, naći snagu vetra na preseku rotora. Rešenje: h) Naći procenat snage vetra koju vetrogenerator iskoristi. Rešenje:

b) Calculate the expected electric power of the wind generator Pel = Pn. Solution: c) If we define the factor (CF) = Produced electricity / (Pn 8760) = 0,385 find the produced electricity. Wel energy during the year. Solution: d) What is the total annual cost of the wind turbine if the investment cost is 3 million NJ (life expectancy of 25 years, i = 2%) and the annual maintenance cost is 0.2 million NJ? Solution: e) What is the price (NJ / kWh) of kWh electricity produced annually? Solution: f) Find the mean wind speed at 2m from the ground. Solution: f) Show that. Solution: g) If the air density r = 1,225 kg / m³, find the wind power at the cross section of the rotor. Solution: h) Find the percentage of wind power that the wind generator uses. Solution: