WTT-W4-Slide Student copy.pdf - Three-blade propeller-type...

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Three-blade propeller-type wind turbine and its components to accompany Wind Turbine Technology , by A Hemami (2012) Chapter 5 Assist. Prof. Mahmut Sami BÜKER
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Introduction We learned that there are various types of wind turbines. The efficiency and practicality of horizontal-axis, three-blade, propeller-type turbines has resulted in domination of the market and, in almost all the new installations of wind farms, this is the only type that is employed for energy generation. In this chapter, the major components of this type of turbine are discussed. A wind turbine must grasp the mechanical energy from wind and convert it to electrical energy . So, it has both mechanical components and electrical components . For simplicity, the terms “propeller type” and “three - blade” are omitted, and when wind turbine is used, reference is made to the three-blade propeller-type wind turbine , which is always installed with a horizontal axis and is the most common commercial wind turbine. We first describe the mechanical components and then the electrical components . Both categories then can be divided into primary components (those without which a turbine cannot function) and the secondary components that either are much smaller, or could be deleted based on the design of each particular turbine . 4
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Table helps to categorize the components. In addition to the components/ equipment shown in the table, a wind turbine is equipped with control systems without which a modern turbine cannot function. Introduction The major control systems that comprise mechanical, electrical, and/or hydraulic components are blade pitch system and turbine yaw system. Certain modifications can be expected in the future generations of wind turbines. 5 This categorization is just to help make a distinction between various components. There is not always a sharp line between primary and secondary components. For example, a wind turbine cannot function if its anemometer is broken. Nevertheless, an anemometer is an instrument that is much smaller compared to other equipment.
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Mechanical Components A wind turbine primarily consists of a tower , a nacelle , a rotor (a hub and three blades), and a foundation, which cannot be seen. The blades are connected to a central hub , which rotates with them. The whole assembly is called as rotor . The rotor is mechanically isolated from the rest of the turbine that does not rotate with wind. The blades and hub rotate the main shaft, which goes inside an enclosed space on the top of the tower. This enclosed space is called the nacelle. The nacelle houses the gearbox , generator , and all the other necessary components such as heat exchangers , coolers and heaters , other motors and gears and so on, as will be described later.
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  • Spring '11
  • O.Uzol
  • Wind turbine, Electrical generator

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