Repowering and Used Wind Turbined

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  • Welcome to this webinar about repowering and used wind turbines. My name is Walter Hulshorst. I’m working as consultant at Econ International located in the Netherlands. Econ International performs consultancy and projectmanagement on energy related topics. Before working at Econ International, I’ve worked as consultant at KEMA the Netherlands on Power Quality, availability, transformers and renewables. We have performed some work for: Consultancy companies like KEMA (electricity) and DHV (Water) Utilities like Nuon (Gas) Railway like ProRail But also some consultancy activities for the leonardo-energy on renwables. This webinar shows you some results of a study performed by Econ International in the first months of 2008. The reason for this study was due to the high number of visitors on the Leonardo energy website, who were looking for information about used windturbines. Despite the fast growing of wind energy there was a very limited information about the results of repowering projects and used wind turbines. This study summerizes some results learned on projects on repowering.

Transcript

  • 1. Repowering & used turbines W. Hulshorst Oct. 2008 Business Connecting and Development
  • 2. Agenda
    • Global Wind market by the end of 2007
    • Repowering (examples)
    • Used Turbines
    Business Connecting and Development
  • 3. Installed capacity Business Connecting and Development
  • 4. Per region or country Business Connecting and Development
  • 5. Development of wind turbines Business Connecting and Development
  • 6. History wind electricity US Denmark Germany Experience from Germany and Danmark is interesting
  • 7. Danmark Business Connecting and Development
    • Recognized that smaller, aging turbines were an obstacle
    • to new project development
    • Wind installation began in 1980s, so relatively large
    • number of <75 kW turbines
    • Removing and repowering those turbines would require
    • an overt and explicit incentive
    • Result: Denmark’s repowering program led to the
    • repowering of ~2/3rd of the oldest turbines
  • 8. Danmarks repowering programm Business Connecting and Development
    • First Program: 2001 – 2003
      • For turbines <100 kW, “repowering certificates” allowed owners to install three times the capacity removed
      • For 100-150 kW turbines twice the capacity removed
      • 1.480 turbines totaling 122 MW were replaced with 272 new turbines totaling 332 MW
    • Second Program: started 2004
      • Intends to repower another 175 MW of aging wind turbines
      • For turbines <450 kW, “repowering certificates“ allow owners to decommission projects from 2004 –2009 and install factory new turbines from 2005 –2009
  • 9. Germany Business Connecting and Development
    • Germany’s wind additions came later, but repowering expected to accelerate as available new wind sites diminish
    • To encourage repowering...
      • Before 2004, feed-in tariff provided some encouragement by offering new projects a higher payment than existing projects
      • After 2004, feed-in tariff has offered a longer/higher payment to turbines that replace/modernize existing projects built before December 1995 and are at least three times the capacity
    • Given siting and permitting barriers, the wind industry argues that the present incentive is insufficient
  • 10. Why repowering? Business Connecting and Development
    • fewer wind turbines
    • more wind power from the same area of land
    • higher efficiency, lower costs
    • better appearance
    • better power grid integration
    • wind speed and direction are known.
  • 11. Why encourage repowering? Business Connecting and Development For government and local authorities, the results of repowering can be positive:
    • additional wind energy power will create a larger basis for wind energy
    • although the wind turbines are higher after repowering, the quality of the landscape is often perceived as being improved, since the number of wind turbines is reduced
    • replacement can be used to achieve targets for renewable energy or for CO2 reduction.
  • 12. Example repowering? Business Connecting and Development
  • 13. Impression repowering Business Connecting and Development Before Windfarm Bassens Lower Saxony After
  • 14. Effects of repowering? Business Connecting and Development
  • 15. Expectations Germany Business Connecting and Development
  • 16. What to do with the older turbines? Business Connecting and Development
  • 17. Transport to…? Business Connecting and Development
  • 18. Storage for spare parts? Business Connecting and Development
  • 19. Or find new markets? Business Connecting and Development
  • 20. Or find new markets? Business Connecting and Development
  • 21. Or find new markets? Business Connecting and Development
  • 22. The used turbine market! Business Connecting and Development
  • 23. Used Wind turbines Business Connecting and Development
    • Many wind turbines are designed to achieve a service of 20 years or longer.
    • Politicians in many countries have focused their attention on up-scaling wind turbines at existing locations.
    • As a result of repowering, interest in used wind turbines with a remaining service life of several years is growing across the world.
  • 24. Why Used turbines? Business Connecting and Development
    • lower investment capital
    • shorter project duration
    • Many manufacturers are no longer fabricating turbines of small sizes.
    • maintenance work is easier
    • Overhaul during replacement
    • Contribute to sustainable development
    • Entering new power markets
  • 25. Disadvantage used turbines Business Connecting and Development
    • more efforts will be required to select suitable turbines for specific projects
    • the life expectancy of overhauled used wind turbines cannot be satisfactorily predicted.
    • the procurement of spare parts may also become an obstacle, as most manufacturers’ technical support expires after 20 years.
  • 26. Price of used WT Business Connecting and Development
  • 27. Example of used WT Business Connecting and Development
  • 28. No problems? Business Connecting and Development
    • Successful utilisation of wind turbines is always dependent on sufficient wind energy potential
    • Electrical stability in weak grids with stochastic feeders, limits the permissible load of wind turbines. That is why only small generators in the 150 to 600 kW class are suitable for simple grid connections.
    • Turbines of this size are no longer being manufactured and are only available on the second-hand market.
  • 29. Thanks for your attention Walter Hulshorst Econ International B.V. Florijnweg 14 a 6883 JP Velp The Netherlands T: + 31 (0)61 047 45 77 F: + 31 (0)26 381 64 82 E: walter @ econ-international.nl W: www.econ-international.nl Business Connecting and Development