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Design Optimization of Bifacial Module PV Power Plants Based on Simulations and Measurements
M. Guari Borrull, A. Scherl, T. Kampschulte
Bifacial, Simulation, System Performance, Design, Experimental Methods
PV Systems and Storage – Modelling, Design, Operation and Performance
Subtopic: Design and Installation of PV Systems
Event: 37th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CO.9.5
1305 - 1310
ISBN: 3-936338-73-6
Paper DOI: 10.4229/EUPVSEC20202020-5CO.9.5
0,00 EUR
Document(s): paper, presentation


In contrast to monofacial photovoltaic (PV) systems, bifacial PV systems can harvest sunlight from both front and rear sides, hence increasing the generated energy yield. The biggest contribution to the additional generated energy comes from the irradiance reaching the rear side of the bifacial module, which depends on the system installation design. In this work, the optimum geometry of system design for bifacial PV systems is analysed. The individual and combined effect of the installation parameters on the energy yield of bifacial PV systems are studied through simulations and measurements. The experimental approach to the present work involves calibrating simulations on PVsyst through long- and shortterm measurements. Besides from calibration of simulations, on the one side, long-term measurements give the information of how the Bifacial Gain in Energy (BGE) behaves along the year as well as predictions of the annual BGE. On the other side, short-term measurements allow finding the individual effect of different installation settings such as albedo and size of the system. Results show that the BGE is directly proportional to the ground albedo. For a big scale bifacial PV system with nonartificial installed albedo, annual BGE’s of 4 % are yielded. Moreover, by installing a white reflective cover underneath the modules, it is found that the BGE can be increased up to 8 %. It is also found that modules in large scale systems generate comparably lower energy levels due to large shadowing areas; up to 12 % less bifacial gain in comparison to single modules.