In this paper, energy and exergy characteristics of wind energy are investigated. The effects of wind speed and air temperature and pressure at the inlet of a wind turbine on wind chill temperature are examined. We also investigate energy and exergy efficiencies of the wind energy generating system and verify the models through a case study on a 100-kW wind generating system for 21 climatic stations in the province of Ontario, Canada. New energy and exergy efficiency maps of the wind energy generating system are introduced to provide a common basis for regional assessments and interpretations. These efficiency maps are plotted for two months of the year (January and July), which are taken to be representative months of the winter and summer seasons. The results show that aerial differences between energy and exergy efficiencies are approximately to 20-24% at low wind speeds and approximately to 10-15% at high wind speeds.

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