Author: Ruben D. Cohen
Publisher:
ISBN:
Category : Wind turbines
Languages : en
Pages : 242

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Book Description

Author: James Alfred Carter
Publisher:
ISBN:
Category : Wind power
Languages : en
Pages : 278

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 175

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Book Description
Designers of a horizontal axis wind turbine yaw mechanism are faced with a difficult decision. They know that if they elect to use a yaw- controlled rotor then the system will suffer increased initial cost and increased inherent maintenance and reliability problems. On the other hand, if they elect to allow the rotor to freely yaw they known they will have to account for unknown and random, though bounded, yaw rates. They will have a higher-risk design to trade-off against the potential for cost savings and reliability improvement. The risk of a yaw-free system could be minimized if methods were available for analyzing and understanding yaw behavior. The complexity of yaw behavior has, until recently, discouraged engineers from developing a complete yaw analysis method. The objectives of this work are to (1) provide a fundamental understanding of free-yaw mechanics and the design concepts most effective at eliminating yaw problems, and (2) provide tested design tools and guidelines for use by free-yaw wind systems manufacturers. The emphasis is on developing practical and sufficiently accurate design methods.

Author: A. C. Hansen
Publisher:
ISBN:
Category : Wind power
Languages : en
Pages : 0

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Book Description
Designers of a horizontal axis wind turbine yaw mechanism are faced with a difficult decision. They know that if they elect to use a yaw-controlIed rotor then the system will suffer increased initial cost and increased inherent maintenance and reliability problems. On the other hand, if they elect to allow the rotor to freely yaw they know they will have to account for unknown and random, thoughbounded, yaw rates. They will have a higher-risk design to trade-off against the potential for cost savings and; reliability improvement. The risk of a yaw-free system could be minimized if methods were available for analyzing and understanding yaw behavior. The complexity of yaw behavior has, until recently, discouraged engineers from developing a complete yaw analysis method. The objectives ofthis work are to (1) provide a fundemantal understanding of free-yaw mechanics and the design concepts most effective at eliminating yaw problems, and (2) provide tested design tools and guidelines for use by free-yaw wind systems manufacturers. The emphasis here is on developing practical and sufficiently accurate design methods.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 175

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Book Description
Designers of a horizontal axis wind turbine yaw mechanism are faced with a difficult decision. They know that if they elect to use a yaw- controlled rotor then the system will suffer increased initial cost and increased inherent maintenance and reliability problems. On the other hand, if they elect to allow the rotor to freely yaw they known they will have to account for unknown and random, though bounded, yaw rates. They will have a higher-risk design to trade-off against the potential for cost savings and reliability improvement. The risk of a yaw-free system could be minimized if methods were available for analyzing and understanding yaw behavior. The complexity of yaw behavior has, until recently, discouraged engineers from developing a complete yaw analysis method. The objectives of this work are to (1) provide a fundamental understanding of free-yaw mechanics and the design concepts most effective at eliminating yaw problems, and (2) provide tested design tools and guidelines for use by free-yaw wind systems manufacturers. The emphasis is on developing practical and sufficiently accurate design methods.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9

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Book Description
Dynamic loads must be predicted accurately in order to estimate the fatigue life of wind turbines operating in turbulent environments. Dynamic stall contributes to increased dynamic loads during normal operation of all types of horizontal-axis wind turbine (HAWTs). This report illustrates how dynamic stall varies throughout the blade span of a 10 m HAWT during yawed and unyawed operating conditions. Lift, drag, and pitching moment coefficients during dynamics stall are discussed. Resulting dynamic loads are presented, and the effects of dynamic stall on yaw loads are demonstrated using a yaw loads dynamic analysis (YAWDYN). 12 refs., 22 figs., 1 tab.

Author: Norman John Siedschlag
Publisher:
ISBN:
Category : Wind turbines
Languages : en
Pages : 228

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Book Description

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572

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Book Description

Author: Xudong Cui
Publisher:
ISBN:
Category : Wind turbines
Languages : en
Pages : 266

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Book Description

Author: Xudong Cui
Publisher:
ISBN:
Category : Wind turbines
Languages : en
Pages : 104

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Book Description