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Practical Comparison between View Factor Method and Ray-Tracing Method for Bifacial PV System Yield Prediciton

: Kang, J.; Jang, J.; Reise, C.; Lee, K.

Volltext urn:nbn:de:0011-n-5654875 (596 KByte PDF)
MD5 Fingerprint: 0213b114901c7a98846bae113360ad4d
Erstellt am: 29.11.2019

36th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2019 : Proceedings of the international conference held in Marseille, France, 09-13 September 2019
Marseille, 2019
ISBN: 3-936338-60-4
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <36, 2019, Marseille>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
Photovoltaik; Photovoltaische Module und Kraftwerke; Photovoltaische Kraftwerke; tracing; PV System Yield Prediction; factor method

View-factor and ray-tracing are the most commonly used methods to estimate the irradiance incident on the rear side of modules in bifacial PV systems. The view-factor method is used in well-known commercial software, such as PVsyst and SAM. On the other hand, the ray-tracing method is not commercialized yet and is rather complicated and time consuming to use. However, it is more accurate and suitable for complicated geometries. Despite the mentioned advantages and disadvantages in both models, a practical comparison of bifacial PV yield predictions using both methods on a system level is not available in the literature to the best knowledge of the authors. This paper determines the accuracy of the view factor method with respect to ray-tracing. The rear-side irradiance is significantly lower in view factor method and mean bias error (MBE) is up to 19.7 % lower than in ray-tracing method.