Title:	Yield Simulations for Horizontal Axis Trackers with Bifacial PV Modules in PVsyst
Author(s):	A. Mermoud, B. Wittmer
Keywords:	Bifacial, PV System, Simulation, Tracking, Modelling / Modeling, Modelling and Simulation
Topic:	PV Systems - Performance, Applications and Integration
Subtopic:	Design and Installation of PV Systems
Event:	35th European Photovoltaic Solar Energy Conference and Exhibition
Session:	6CV.2.19
Pages:	1929 - 1934
ISBN:	3-936338-50-7
Paper DOI:	10.4229/35thEUPVSEC20182018-6CV.2.19
Price:	0,00 EUR
Document(s):	paper, poster

Abstract/Summary:

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The simulation of the energy yield of Bifacial PV modules is not straightforward, since most of the light reaching the back side of the PV modules is scattered back from the ground. For tracking systems this is particularly challenging since the geometry is changing as the sun moves through the sky. In PVsyst, a simplified 2D model was introduced to describe bifacial horizontal single axis trackers with regular spacing. The approach uses view factors to model the fraction of light that is scattered back to the back side of the PV modules. The bifacial calculation includes direct and sky diffuse contributions on the back side, as well as ground scattering to the front and back side of the modules.