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How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
How Wind Turbines Generate Electricity
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How Wind Turbines Generate Electricity

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How Do Wind Turbines Generate Electricity? …

How Do Wind Turbines Generate Electricity?
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  • A good, complete overview of wind turbine technology. Your efforts in making this presentation is appreciated!
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  • Wind energy blows the blade of the turbine or the wind turbine converts the kinetic energy in the wind to mechanical energy while the attached generator converts the mechanical energy to electrical energy. Diagrammatically: wind(containing kinetic energy)---WIND TURBINE---mechanical energy-----GENERATOR----electrical energy i.e. wind turbine converts kinetic energy from the wind to mechanical energy then the generator converts it to electrical energy.
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  • Put illustration of lift and drag on turbine blade
  • Put illustration of lift and drag on turbine blade
  • Put illustration of lift and drag on turbine blade
  • Transcript

    • 1. HOW WIND TURBINES GENERATE ELECTRICITY<br />
    • 2. First, let’s answer a very important question.<br />
    • 3. What are Wind Turbines?<br />
    • 4. What are Wind Turbines?<br />Wind turbines are devices that convert the wind’s kinetic energy into mechanical energy.<br />
    • 5. What are Wind Turbines?<br />If it further converts the mechanical energy to electricity, then we call it a wind generator.<br />
    • 6. WARNING!<br />
    • 7. WARNING!<br />For convenience, whenever you see the word “wind turbine” after this slide, it will refer specifically to a wind generator.<br />
    • 8. Wind turbines have a variety of shapes and sizes…<br />
    • 9.
    • 10. But they’re all composed of the same 3 basic parts.<br />
    • 11. Basic Parts<br />
    • 12. Basic Parts<br />A. Rotor Blades<br />
    • 13. Basic Parts<br />A. Rotor Blades<br />
    • 14. Basic Parts<br />B. Shaft<br />A. Rotor Blades<br />
    • 15. Basic Parts<br />B. Shaft<br />A. Rotor Blades<br />
    • 16. Basic Parts<br />B. Shaft<br />A. Rotor Blades<br />C. Generator<br />
    • 17. Basic Parts<br />B. Shaft<br />A. Rotor Blades<br />C. Generator<br />
    • 18. Basic Parts<br />A. Rotor Blades<br />The rotor blades are the “wind catchers” of a wind turbine.<br />
    • 19. Basic Parts<br />A. Rotor Blades<br />They’re long projections that have aerodynamic designs.<br />
    • 20. Basic Parts<br />A. Rotor Blades<br />When wind passes, it forces these rotor blades to turn.<br />
    • 21. Basic Parts<br />B. Shaft<br />The shaft is a rod that connects the rotor blades to the generator.<br />
    • 22. Basic Parts<br />B. Shaft<br />Its main purpose is to transfer the rotational mechanical energy of the rotor blades to the generator.<br />
    • 23. 3 Basic Parts<br />C. Generator<br />Finally, the generator is a device designed to convertmechanical energy into electrical energy.<br />
    • 24. 3 Basic Parts<br />C. Generator<br />It uses the principle of electromagnetic induction.<br />
    • 25. Now that you know its basic parts, let’s understand how wind turbines generate electricity.<br />
    • 26. Basic Processes<br />
    • 27. Basic Processes<br />A. Capturing Wind Energy<br />
    • 28. Basic Processes<br />A. Capturing Wind Energy<br />B. Converting to Electricity<br />
    • 29. Basic Processes<br />A. Capturing Wind Energy<br />
    • 30. Basic Processes<br />A. Capturing Wind Energy<br />Wind energy is captured using the wind turbine’s rotor blades.<br />
    • 31. Basic Processes<br />A. Capturing Wind Energy<br />Wind energy is captured using the wind turbine’s rotor blades.<br />
    • 32. Basic Processes<br />A. Capturing Wind Energy<br />When wind passes through the blades, two aerodynamic forces are at work.<br />
    • 33. Basic Processes<br />A. Capturing Wind Energy<br />Rotor Blade<br />
    • 34. Basic Processes<br />A. Capturing Wind Energy<br />LIFT<br />Rotor Blade<br />
    • 35. Basic Processes<br />A. Capturing Wind Energy<br />LIFT<br />Rotor Blade<br />DRAG<br />
    • 36. Basic Processes<br />A. Capturing Wind Energy<br />These two forces cause the rotor blades to turn, depending on how much force the wind exerts on them.<br />
    • 37. Basic Processes<br />A. Capturing Wind Energy<br />The process converts the wind’s kinetic energy to mechanical energy <br />(turning of rotor blades)<br />
    • 38. After this, it’s time to convert the mechanical energy into electricity.<br />
    • 39. Basic Processes<br />B. Converting to Electricity<br />The turning of the rotor blades would simultaneously cause the shaft to turn, which is connected to a generator.<br />
    • 40. Basic Processes<br />B. Converting to Electricity<br />When the rotor blades turn,<br />
    • 41. Basic Processes<br />B. Converting to Electricity<br />When the rotor blades turn,<br />
    • 42. Basic Processes<br />B. Converting to Electricity<br />the shaft also turns.<br />
    • 43. Basic Processes<br />B. Converting to Electricity<br />the shaft also turns.<br />
    • 44. Basic Processes<br />B. Converting to Electricity<br />Which makes the generator produce electricity!<br />
    • 45. Basic Processes<br />B. Converting to Electricity<br />Which makes the generator produce electricity!<br />
    • 46. Basic Processes<br />B. Converting to Electricity<br />In this process, the rotational mechanical energy of the shaft is converted to electricity by the generator.<br />
    • 47. Thanks to technology,<br />modern wind turbines<br />
    • 48. have a host of other features<br />
    • 49. that help in solving some other problems.<br />
    • 50. Other Processes Involved<br />
    • 51. Other Processes Involved<br />Increasing RPM<br />
    • 52. Other Processes Involved<br />Increasing RPM<br />You might notice that large wind turbines turnslowly.<br />
    • 53. Other Processes Involved<br />Increasing RPM<br />On average, their rotor blades rotate at a speed of 20 rpm (rotations per minute).<br />
    • 54. Other Processes Involved<br />Increasing RPM<br />20 rpm is tooslow to power up a generator! <br />
    • 55. Other Processes Involved<br />Increasing RPM<br />Large wind turbines use a gearbox to increase the rpm from 20 rpm to as much as 2000 rpm!<br />
    • 56. Other Processes Involved<br />Increasing RPM<br />To understand the process, let’s examine these two gears:<br />
    • 57. Other Processes Involved<br />Increasing RPM<br />Gear A<br />Gear B<br />
    • 58. Other Processes Involved<br />Increasing RPM<br />Gear A<br />Gear A has 9 gear teeth<br />Gear B<br />
    • 59. Other Processes Involved<br />Increasing RPM<br />Gear A<br />while Gear B only has 6.<br />Gear A has 9 gear teeth<br />Gear B<br />
    • 60. Other Processes Involved<br />Increasing RPM<br />Gear A<br />while Gear B only has 6.<br />This would mean that 1 revolution of Gear A would be equal to 1.5 (9÷6) revolutions for Gear B.<br />Gear A has 9 gear teeth<br />Gear B<br />
    • 61. Other Processes Involved<br />Increasing RPM<br />Gear A<br />while Gear B only has 6.<br />So if Gear A revolves at a rate of 20 rpm, Gear B would revolve at a faster rate of 30 (20×1.5) rpm.<br />Gear A has 9 gear teeth<br />Gear B<br />
    • 62. Other Processes Involved<br />Increasing RPM<br />In large wind turbines, they use a variety of gears (hence the name, gearbox) to multiply the rpm of the shaft.<br />
    • 63. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />HAWTs (horizontal-axis wind turbines) should be directed the same direction as the wind to maximize the energy collected.<br />
    • 64. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />Wind direction isn’t constant though, <br />
    • 65. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />So modern HAWTs use a yaw-adjustment system<br />
    • 66. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />To position the rotor blades in the correct direction.<br />
    • 67. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />The system usually consists of a sensor to monitor wind direction<br />
    • 68. Other Processes Involved<br />Yaw Adjustment (HAWT only)<br />and a motor to adjust turbine direction.<br />
    • 69. Other Processes Involved<br />Braking Mechanism<br />Finally, there are places where wind speeds can reach extremely high levels.<br />
    • 70. Other Processes Involved<br />Braking Mechanism<br />Overspeeding of the rotor blades can cause malfunctions on the wind turbine’s system.<br />
    • 71. Other Processes Involved<br />Braking Mechanism<br />This is why a braking mechanism should exist to limit the maximum speed of the rotor blades.<br />
    • 72. Image Credits<br /> All other illustrations are properties of:<br />
    • 73. To learn more about the wind turbine community, visit WindTurbines.Net.<br />
    • 74. END<br />

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