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Abstract

Atmospheric stability is considered one of the most important factors affecting the increase or decrease in wind speed in the atmosphere and thus affecting the wind energy density. Stability conditions are classified into three categories: unstable, stable, and neutral. This study aims to analyze the stability of the atmospheric conditions in Southern Iraq, specifically in the Ali al-Gharbi region, using the Monin-Obukhov length method. Which includes field data for the wind speed at three altitudes (10 m, 30 m, and 50 m) in 2017. The mean daily and seasonal friction velocities were calculated. Wind speed was calculated for different atmospheric stability conditions and its effect on wind power density and wind energy density for each case was studied. The monthly mean wind power density and wind energy density at heights (30 m and 50 m) were estimated. The results showed that the highest values of friction velocity and wind speed were in the summer season, and the lowest values of friction velocity and wind speed were in the autumn season. The daily frictional velocity reaches its highest value at midday. The highest wind energy density was in stable conditions, followed by unstable conditions, while in neutral conditions, wind energy density was the lowest. Also, the highest values of wind power density and wind energy density were in June and July, and the lowest values of wind power density and wind energy density can be observed in January and February. From the results, conclude that the amount of wind energy production is high in stable Atmospheric conditions, and the highest wind energy density was in the summer season.

Keywords

Friction velocity, Monin-Obukhov length, Wind power density, Wind energy density, Wind speed

Subject Area

Physics

Article Type

Article

First Page

3397

Last Page

3407

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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