Figure 15 shows that wind turbine model with two blades has slow performance and reduce more wind energy. Four blades wind turbine at wind speed of 6 to 11 m/s has higher rotation compared with three blades wind turbine. However, after the wind speed of 11 m/s the four blades wind turbine has low rotation and decreasing power when the wind speed between 9 m/s to 15 m/s. Three blades wind turbine has better performance than that four blades wind turbine. At wind speed 6 m/s to 15 m/s three blades wind turbine model has increasing power and the rotation produced can exceed the rotation of four blades wind turbine.
Figure