5. The three rotor blades of a wind turbine can be considered to be long thin...
Wind rotor of a wind turbine has total inertia 4820000 kgm2. The rotor rotates at nominal speed 17 rpm. The generator nominal power is 1.8 MW. What is the time needed to stop the rotating wind rotor using nominal generator torque? It is assumed, that no aerodynamic torque exists during the braking. (Give the answer of accuracy of at least three significant digits.) Kinetic energy Answer MJ Nominal torque of generator Answer kNm Required time Answer s
2 (b) A blade of a wind turbine can be considered as a thin rod, of mass m, length a and cross- sectional area A. (i) Show that the moment of inertia of the blade about an axis passing through its centre of mass and perpendicular to its length is 1 = izma? [8] (ii) By applying the parallel axis theorem or otherwise, deduce the moment of inertia of the blade about an axis passing through one end of the...
An industrial wind turbine has blades that are 35 m long. On a 20?C day, wind at atmospheric pressure blows with a velocity of 12 m/s , and wind in the turbine wake only has a velocity of 11 m/s .(a) If we assume that all of the kinetic energy lost by the wind is converted to electrical energy by the turbine, then what is the power generated by this turbine? (density is 1.205 kg/m^3)(b) This turbine is rated as...
Can anyone do part D, please? 3. 1728 18 CM H0.49 A 286 pound safe containing $5 million dollars is on an incline. Derek is pulling on the safe with a force of P. EXAMPLE NOTES IMAGES DISCUSS UNITS STATSHELF Part Description Answer Chk History What is the minimum force P required to prevent the box from sliding down the incline? (include units with answer) What is the minimum force P required to prevent the box from tipping downward? (include...
3. 1072 4 m/s 26 A 80 kg Prof. Sukanek wearing ice skates stands motionless on the ice when he throws a 8 kg block with a velocity as shown in the figure. Assume he keeps his legs rigid during the throw and neglect friction and the motion of his arms. Use right and up as the positive directions. NOTES IMAGES DISCUSS UNITS STATS HELP PREFERENCES Part Description Answer Chk History A. 6.82 pts. 75% Assume he completes the throw...
3 1728 18 CM H 0.49 A 286 pound safe containing $5 million dollars is on an incline. Derek is pulling on the safe with a force of P. EXAMPLE NOTES IMAGES DISCUSS UNITS STATS HELP Part Description Answer Chk History Points Ans Time (D/T) Feedback What is the minimum forceP required to prevent the box from sliding down the incline? (include units with answer) 102.38 lb Wrong Format Check | 6.53 pts, 98% | 2% try penalty 102.38 Ib2019-01-13...
can anyone do part D? 1728 18 CM H0.49 41 A 286 pound safe containing $5 million dollars is on an incline. Derek is pulling on the safe with a force of P NOTES IMAGES DISCUSS UNITS STATS HELP Part Description Answer Chk History What is the minimum force P required to prevent the box fromA: 333.54 N sliding down the incline? (include units with ans What is the minimum force P required to prevent the box fromA: 418.3 N...