Introduction to Wind Turbine.pdf

Horizontal axis wind turbines hawt horizontal axis

Info icon This preview shows pages 2–4. Sign up to view the full content.

Horizontal axis wind turbines (HAWT) Horizontal-axis wind turbines consist of a two- or three-bladed rotor turning a horizontal shaft. The shaft is connected to a gear box and a generator. The generator converts the rotational (mechanical) energy into electrical energy. The rotor and generator are mounted at the top of a tower. Figure 1 for example, shows two types of horizontal-axis wind turbines: upwind and downwind. Figure 1. Typical horizontal-axis wind turbines (HAWT). The amount of electrical power produced by the generator is primarily determined by the factors below: The speed of wind. The faster the wind speed , the higher the generated electrical power. Rotor blade Wind Wind Nacelle Yaw control mechanism Tower Gear box and generator (a) Upwind HAWT (b) Downwind HAWT
Image of page 2

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Introduction – Wind Turbines Discussion of Fundamentals Introduction to Wind Power 3 The diameter and shape of the rotor blades. The wider the diameter of the blades and the higher the rotor efficiency coefficient, C P (determined mainly by the shape of the rotor blades), the higher the generated electrical power. The height of the tower. The wind speed increases at higher altitudes, therefore, taller towers can catch more powerful wind and allow more electrical power to be generated. Upwind turbines Upwind turbines face the wind, as Figure 1a shows. In this way, the wind hits the blades before it hits the tower. Most modern turbines have this design. The main advantage of upwind turbines is that their operation is smoother and they can deliver more electrical power (and thus, more electrical energy) than downwind turbines. The main drawback of upwind turbines is that they require a mechanism to control the yaw (left-right motion), since the force of the wind tends to make the blades turn downwind. The yaw control mechanism automatically adjusts the azimuthal orientation of the wind turbine nacelle in order to keep the blades facing into the wind.
Image of page 3
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.
  • One '14
  • Energy, Wind turbine, Wind Turbines

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern