According to studies, wind contributes only less than 1% of the world's energy needs (Grose 1). Even if the percentage of contribution is very low, the use of wind turbines as means to generate electricity grow continuously. This is because people nowadays discover the good benefits of using wind turbines in terms of environmental factors.
However, some disadvantages still prevent other people from using wind turbines and few of these reasons are related to high cost of manufacture and noise created by these machines (Mahoney 2). Ongoing improvements on the blade's design and material are continuously done to further develop the machine in terms of its aerodynamic properties and performance.
A wind turbine is a machine that can generate electricity through the use of wind power. A wind turbine has large rotating blades that are capable of capturing wind and creating kinetic energy. This energy is converted to mechanical energy which is used to generate electricity for various purposes (Mahoney 1). Shown below are the parts of a typical wind turbine:
The horizontal axis wind turbine (HAWT) is also known as the classical or most commonly used wind turbine in the world. The axis of rotation of these turbines is horizontal to the ground and parallel to the wind stream (Mathew 16). Shown is a diagram showing a sample of a horizontal axis wind turbine.