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Exergy and reliability analysis of wind turbine systems: A case study

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  • Ozgener, Onder
  • Ozgener, Leyla

Abstract

The present study undertakes an exergy and reliability analysis of wind turbine systems and applies to a local one in Turkey: the exergy performance and reliability of the small wind turbine generator have been evaluated in a demonstration (1.5Â kW) in Solar Energy Institute of Ege University (latitude 38.24 N, longitude 27.50 E), Izmir, Turkey. In order to extract the maximum possible power, it is important that the blades of small wind turbines start rotating at the lowest possible wind speed. The starting performance of a three-bladed, 3Â m diameter horizontal axis wind turbine was measured in field tests. The average technical availability, real availability, capacity factor and exergy efficiency value have been analyzed from September 2002 to November 2003 and they are found to be 94.20%, 51.67%, 11.58%, and 0-48.72%, respectively. The reliability analysis has also been done for the small wind turbine generator. The failure rate is high to an extent of 2.28x10-4Â h-1 and the factor of reliability is found to be 0.37 at 4380Â h. If failure rate can be decreased, not only this system but also other wind turbine systems of real availability, capacity factor and exergy efficiency will be improved.

Suggested Citation

  • Ozgener, Onder & Ozgener, Leyla, 2007. "Exergy and reliability analysis of wind turbine systems: A case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(8), pages 1811-1826, October.
    • Handle: RePEc:eee:rensus:v:11:y:2007:i:8:p:1811-1826
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    References listed on IDEAS

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    1. Hepbasli, Arif & Ozgener, Onder, 2004. "A review on the development of wind energy in Turkey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 8(3), pages 257-276, June.
    2. Ozgener, Onder, 2005. "A review of blade structures of SWTSs in the Aegean region and performance analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 9(1), pages 85-99, February.
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