Yaw dynamics of horizontal axis wind turbines. Final report
- Utah Univ., Salt Lake City, UT (United States)
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.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Utah Univ., Salt Lake City, UT (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 10144778
- Report Number(s):
- NREL/TP-442-4822; ON: DE92001245
- Resource Relation:
- Other Information: PBD: May 1992
- Country of Publication:
- United States
- Language:
- English
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