Quinten Wiberg posted an update 6 days, 3 hours ago
Due to the variety and range of heat radiation over the surface and the continuous rotation of the earth, air, which is called wind, moves through one place to another place. Wind, which has kinetic energy, is a form of solar energy. It is possible to capture and convert this kinetic energy into other form of energy such as mechanical energy or electrical energy by using proper technology. If the kinetic energy of wind power is converted directly to mechanical power for cutting lumber, pumping water or grinding stones, the system is called windmill. And if the kinetic energy of wind power is converted to electricity by running turbine, the system is called wind generator or wind turbine.Types of wind turbines.Horizontal Axis Wind TurbinesThe generator and the main shaft of rotor are placed at the top of the turbine tower and must be directly pointed into the direction of the flow of wind. It is so-called horizontal axis turbine because the rotor’s rotation axis is parallel to the direction of air flow and the ground. All commercial wind energy grid-connection have been developed with horizontal system. The rotor is used for converting the kinetic wind energy into rotational energy which is used to rotate the generator to generate the electricity. Though commercial turbines are rotated by sensor coupled servo motor, small home used turbines are rotated with small wind vane. Most of the time, gearbox is used in order to quicker rotation which is efficient for electrical generation.Vertical Axis Wind TurbineThe main rotor of these types of turbines is arranged perpendicular with the ground. The main advantage of this arrangement is that it is totally Omni directional. It doesn’t need to be pointed towards the flow of wind. It can capture any directional flow of wind. Due to its perpendicular placement shape, it is possible to place the gearbox and generator near the ground, so any kind of support doesn’t need for the tower. The major disadvantage of using this is that it has low rotational speed. Hence cost will increase due to low power coefficient.Turbine Construction and DesignActually wind turbine converts wind kinetic energy into electrical energy. Two blade rotor and three blade rotor are the most necessary part of these types of turbine. It is the main part where kinetic energy transforms into the electrical energy. Conventionally, horizontal axis turbines are very popular at commercial use. The major components of these types of turbines are mentioned below.Rotor – It is the main visible part which contains around 20% of the cost.Generator – It is the generation part where generates the electricity from mechanical power. It contains approximately 34% cost including control circuits, gear boxes.Structural Supportive component – It bears around 15% of the total cost including rotor raw mechanism and tower structure.