Wind turbines cold weather issues

1 de Jul de 2013

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Wind turbines cold weather issues

  1. Wind Turbines: Cold Weather Issues Henry Kurniadi
  2. Cold Weather Issues
  3. Issue 1: Materials Failure at Low Temperatures
  4. Low Temperatures
  5. final height initial height Impact loading: -- severe testing case -- makes material more brittle -- decreases toughness Impact Testing (Charpy)
  6. Temperature Effect on Metal Failures More brittle More ductile Temp. (oC)
  7. Impact Properties: Ductile to Brittle Transition Temperature (DBTT) lower higher Transition at certain temperature range Material becomes brittle (more susceptible to impact) at low temperature
  8. Use materials that suitable for low temperatures. Welding completed with special low temperature flux. Lubricants & oils suitable for low temperature. Solutions
  9. GE Wind Turbine Technical Changes for Cold Weather
  10. GE Wind Turbine Metallurgy for Cold Weather Minimize impact loading from braking
  11. Guides on Welding for Low Temperatures
  12. Issue 2: Icing (Ice Accretion/積冰)
  13. Icing (Ice Accretion)
  14. Icing and Performance Reduction
  15. Icing and Performance Reduction
  16. Blade Ice Formation Low elevation or polar region High elevation or mountain region
  17. Anti- and De-Icing Technologies for Several Cold Weather Wind Turbines
  18. Other Method: Painted Black
  19. Issue 3: Presence of Snow
  20. Snow Environment Snow (雪) = Water (水) = Damp/Moisture (濕度/濕氣)
  21. IEA Wind Recommended Practices 13: Wind Energy Projects in Cold Climates, Ed. 2011, published May 22, 2012. NREL, Wind Energy: Cold Weather Issues, June 2000. GE Wind Energy: Cold Weather Turbine Operation, June 2005. KOBELCO Welding, A Quick Guide to Suitable Welding Consumables for Low Temperature Steel. Nippon Steel & Sumikin Welding Co., Ltd., Welding for Low Temperature Service Steel. References