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RESEARCH PAPERS

New Spatio-Temporal Wind Exergy Maps

[+] Author and Article Information
Ahmet Duran Şahin

 Istanbul Technical University, Aeronautic and Astronautics Faculty, Meteorology Department, 34469 Istanbul, Turkey

Ibrahim Dincer, Marc A. Rosen

 University of Ontario Institute of Technology, Faculty of Engineering and Applied Science, Oshawa, Ontario, L1H 7K4, CanadaIbrahim.Dincer@uoit.ca

J. Energy Resour. Technol 128(3), 194-202 (Jan 27, 2006) (9 pages) doi:10.1115/1.2213271 History: Received April 14, 2005; Revised January 27, 2006

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 windchill 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 4 months of the year (January, April, July, October), which are taken to be representative months of the seasons. The results show that aerial differences between energy and exergy efficiencies are approximately 20%–24% at low wind speeds and approximately 10%–15% at high wind speeds.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Representative wind energy input and output variables for a wind turbine system

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Figure 2

(a) Map of wind speed (in units of m/s) at a height of 30m in January. (b) Energy-efficiency map for Ontario in January. (c) Exergy-efficiency map for Ontario in January. (d) Map of relative differences (in %) between energy and exergy efficiencies for Ontario in January.

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Figure 3

(a) April wind speed map for 30m. (b) April energy efficiency map for Ontario. (c) April exergy efficiency map for Ontario. (d) April energy-exergy relative errors (%) map For Ontario.

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Figure 4

(a) July wind speed map for 30m. (b) July energy efficiency map for Ontario. (c) July exergy efficiency map for Ontario. (d) July energy-exergy relative errors (%) map for Ontario.

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Figure 5

(a) October wind speed map for 30m. (b) October energy efficiency map for Ontario. (c) October exergy efficiency map for Ontario. (d) October energy-exergy relative errors (%) map for Ontario.

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