AERODYNAMIC MECHANISMS ON A GROUND-MOUNTED SOLAR PANEL AT DIFFERENT WIND DIRECTIONS

Öz

Aerodynamics mechanisms on a solar panel were studied using Computational Fluid Dynamics methodology at different wind directions. The wind velocity was chosen as 10 m/s that corresponding turbulent flow. The inclination angle of the panel was fixed as 25°, while the wind directions were varied as 180°, 135°, 45°, and 0°. Governing equations were solved by utilizing a finite volume method with a realizable k-ε turbulence model and standard wall functions. The results showed that the recirculation area occurred for the straight wind directions, but it was not observed for the oblique wind directions. The highest pressure coefficients occurred at the leading edges of the solar panel and they reduced to the trailing edge for all wind directions. The maximum drag and uplift coefficient was obtained at the wind direction of 0° and 180°, respectively. 

Anahtar Kelimeler

• Wind Direction, Computational Fluids Dynamics,wind loads,solar panel

Farklı Rüzgar Yönlerinde Yere Monte Bir Güneş Panelinde Aerodinamik Mekanizmalar

Öz

Bir güneş panelindeki aerodinamik mekanizmalar, farklı rüzgar yönlerinde Hesaplamalı Akışkanlar Dinamiği kullanılarak incelenmiştir. Rüzgar hızı, türbülanslı akışa karşılık gelen 10m/ s olarak seçilmiştir. Panelin eğim açısı 25° olarak sabitlenirken, rüzgar yönleri 180°, 135°, 45° ve 0 ° olarak değiştirilmiştir. Korunum denklemleri, realizable k-ε türbülans modeli ve standart duvar fonksiyonları ile sonlu hacim yöntemi kullanılarak çözülmüştür. Sonuçlar, yeniden dolaşım bölgesinin düz rüzgar yönlerinde meydana geldiğini, ancak eğik rüzgar yönleri için gözlemlenmediğini göstermiştir. En yüksek basınç katsayıları panelin ön kenarlarında meydana gelmiş ve daha sonra tüm rüzgar yönleri için arka kenara doğru azalmıştır. 0° ve 180° rüzgar yönleri, maksimum sürükleme ve kaldırma açısından sırasıyla kritik bulunmuştur.

Anahtar Kelimeler

• rüzgar yönü,hesaplamalı akışkanlar dinamiği,rüzgar yükü,güneş paneli

Kaynakça

1. 1. Agarwal, A., Irtaza, H. and Zameel, A. (2017) Numerical study of lift and drag coefficients on a ground-mounted photo-voltaic solar panel. Materials Today: Proceedings, 4, 9822-9827. doi:10.1016/j.matpr.2017.06.274
2. 2. Aly, A.M. and Bitsuamlak, G. (2013) Aerodynamic loads on solar panels, Western University, Structures Congress, 1555-1564. doi: 10.1061/9780784412848.137
3. 3. Bitsuamlak, G.T., Dagnew, A.K. and Erwin, J. (2010) Evaluation of wind loads on solar panel modules using CFD, The Fifth International Symposium on Computational Wind Engineering, USA, May 23-27.
4. 4. Jubayer, C.M. and Hangan, H. (2012) Numerical Simulation of Wind Loading on Photovoltaic Panels, University of Western Ontario, Structures Congress, 1180-1188. doi: 10.1061/9780784412367.106
5. 5. Jubayer, C.M. and Hangan, H. (2016) A numerical approach to the investigation of wind loading on an array of ground mounted solar photovoltaic (PV) panels, Journal of Wind Engineering and Industrial Aerodynamics, 153, 60-70. doi: 10.1016/j.jweia.2016.03.009
6. 6. Kopp, G.A., Farquhar, S. and Morrison, M.J. (2012) Aerodynamic mechanisms for wind loads on tilted, roof-mounted, solar arrays, Journal of Wind Engineering and Industrial Aerodynamics, 111, 40–52. doi: 10.1016/j.jweia.2012.08.004
7. 7. Pratt, R.N. and Kopp G.A. (2013) Velocity measurements around low-profile, tilted, solar arrays mounted on large flat-roofs, for wall normal wind directions, Journal of Wind Engineering and Industrial Aerodynamics, 123, 226-238. doi: 10.1016/j.jweia.2013.09.001
8. 8. Shademan, M. and Hangan, H. (2010) Wind loading on solar panels at different azimuthal and inclination angles. The Fifth International Symposium on Computational Wind Engineering, USA, May 23-27.

9. 9. Shademan, M., Balachandar, R. and Barron, R.M. (2014) Detached eddy simulation of flow past an isolated inclined solar panel, Journal of Fluids and Structures, 50, 217–230. doi: 10.1016/j.jfluidstructs.2014.06.024
10. 10. Stenabaugh, S.E., Iida, Y., Kopp, G.A. and Karava, P. (2015) Wind loads on photovoltaic arrays mounted parallel to sloped roofs on low-rise buildings. Journal of Wind Engineering and Industrial Aerodynamics, 139, 16-26. doi: 10.1016/j.jweia.2015.01.007