Fig. 3.1 presents a model wind turbine that is used to show how wind energy can be converted into electricity. The wind is shown blowing towards the model.
(a(i))[3]
Calculate the speed of the air.
(a(ii))[1]
The kinetic energy of the air is used to turn a generator. State the input power of the air passing through the turbine blades.
(b(i))[2]
Calculate the output power of the generator.
(b(ii))[2]
Calculate the efficiency of the wind turbine.
(c)[2]
Calculate the volume of air passing through the circular region swept out by the turbine blades each second.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “KE = ½mv^{2} or, after rearranging, v^{2} = 2KE/m” …