Challenge Cold Climate

Winterwind 2008

December 10th, Norrköping, Sweden

Authors:

Rüdiger Gawrisch, Martin von Mutius

Repower Systems AG

2Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

3Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Definition of Cold Climate

GL Wind-Technical Note 067:

If minimum temperatures of below -20°C have been obser vedduring long term measurements on an average of more thannine days a year, the site is defined as a cold climate site.

Standard Conditions of Use for REpower MM CCV:

Ambient temperature range for operation: -30°C to + 35°C

Ambient temperature range for structure: -40°C to +50°C

4Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Cold Climate Areas

Mean minimum temperature in °C in January (1961-1990)

5Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

6Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Market potential in Cold Climates

China:

Target by 2020: 30,000 MW in total, 70% in cold climates.

Project plans from Honiton Energy* Group: approx. 5,000 MW in Inner Mongolia*Honiton Energy is Partner of REpower in JV REpower North (China)

Canada:

Target by 2020: >10,000 MW in total, 90 % in cold climates

Quebec Tender in total 2,000 MW

Contract of 954 MW for REpower turbines, 100% CCV

7Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Hydro Quebec Tender

8Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

9Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

MM82 CCV - 2 MW Turbine

CCV adaptions :

� Low temperature steel

� Oil and grease

� Reinforced heaters

� Addtional heaters

� Start up procedure

Special requirements for site in Inner Mongolia:

� Dust filter for tower ventilation

� Increased ventilation system due to low air density

10Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

MM82 CCV - 2 MW Turbine

Verification of Design and Certification :

� on the basis of GL Wind ‚Technical Note 067‘

� Steel structures according to REpower internal guidelinesbased on expert‘s knowledge with the underlyingguideline DAST Richtlinie 009

� Details of load and component certification have beenagreed between REpower and certification body

� Approval for Design assessment S-Class CCV isongoing and planned to be finished in 2009

11Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

12Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Waiting for erection

13Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Preperation of erection

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Experience in Inner Mongolia / China

Teamwork

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Experience in Inner Mongolia / China

Work interrupted

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Experience in Inner Mongolia / China

Erection starts

17Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Erection continues

18Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Erection continues

19Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Erection nearly finished

20Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Experience in Inner Mongolia / China

Waiting for grid

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Experience in Inner Mongolia / China

Turbine running

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Experience in Inner Mongolia / China

First experiences from 2 MW turbine operation in China:

� heaters performed very satisfactory

� no icing conditiones occurred up to now

� ventilation system with special filters works reliable

� full CCV test period will be in this winter

23Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

24Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

New Challenge Canada

A metmast in Quebec, Canada

25Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

New Challenge Canada

A metmast in Quebec, Canada

26Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Agenda

Definition of Cold Climate

Market potential in Cold Climates

MM82 CCV – 2MW Turbine

New challenges in Canada

Experiences in China

Conclusion

27Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Conclusion

� Executed concept for low temperatures

� Validation in winter 2008/2009

� Further development is required for sites withicing conditiones

� Components in focus:

Blades and measurement instrumentation

28Winterwind 2008, December 10th, Norrköping, Sweden © 2008 Repower Systems AG

Thank you for your attention!

© 2008 Repower Systems AG

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