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Large Wind Turbines Technology

Large Wind Turbines Technology. Lee Jay Fingersh BLM WEATS August 31, 2010. Wind Turbine Components. Courtesy: Alternative Energy Institute. Power curves. Constant versus Variable speed. Constant speed is cheaper Constant speed is easier to implement

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Large Wind Turbines Technology

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  1. Large Wind Turbines Technology Lee Jay Fingersh BLM WEATS August 31, 2010

  2. Wind Turbine Components Courtesy: Alternative Energy Institute

  3. Power curves

  4. Constant versus Variable speed • Constant speed is cheaper • Constant speed is easier to implement • Variable speed can collect more energy • Variable speed can control loads better

  5. Alternative train designs

  6. Single stage design

  7. Direct drive design

  8. HAWT and VAWT Courtesy: Alternative Energy Institute

  9. Downwind & Upwind Turbines Courtesy: Alternative Energy Institute

  10. Tower type Tubular (600 kW) • Considerations: • Maintenance • Tower Shadow • Transportation Lattice (2 MW)

  11. Number of blades • Odd number is better for mechanical dynamics and aesthetics • Three blades • Most common • Two blades • Must spin faster for the same energy • Faster = more noise • Save the cost of one blade (significant) • One blade • Same concerns and benefits as with two blades • Also require a counterweight • http://www.windpower.org/en/tour/design/concepts.htm http://www.windpower.org/en/tour/design/concepts.htm

  12. Effect of forecasting on storage

  13. “Battery and H2” and “H2 only” systems

  14. System designed for hydrogen production

  15. Storage conclusions • It is possible to “firm up” wind power for a roughly 10% increase in COE. • Using batteries is cost effective • Using hydrogen systems alone is not cost effective because the closed-cycle efficiency is too low • Hydrogen production can be simultaneously accomplished and is cost effective • Hydrogen production alone is less cost effective • Control strategy and proper system sizing are very important • With further investigation, it may be possible to do much better

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