ANALYSIS OF THE I-V CURVE OF BIFACIAL PHOTOVOLTAIC MODULES TO DETERMINE BIFACIAL GAIN AND ENERGY EFFICIENCY
DOI:
https://doi.org/10.59627/cbens.2024.2399Keywords:
Curve IV, Bifacial Gain, AlbedoAbstract
Renewable energy sources have gained prominence in recent years, with photovoltaic solar energy being widely discussed as one of the most relevant clean energy sources for achieving decarbonization in developed countries. The search for new technologies to increase energy production has become essential to keep photovoltaic solar energy relevant in the international market. Bifacial photovoltaic modules play an important role in this topic, as they allow an increase in energy production, using the same components, raw materials and physical space for energy production. In this article, two photovoltaic modules from the same manufacturer and with the same nominal power were used, one monofacial and the other bifacial. Current and voltage curves were plotted to analyze the instantaneous bifacial gain on a clear day. Curve IV indicated a bifacial gain of 5.9% in relation to the monofacial module. It was possible to observe that during dawn and dusk the bifacial gain showed an increasing trend, reaching 7.5% for the analyzed model. The daily energy efficiency of the bifacial face of the photovoltaic module was 10% on average, reaching its maximum value of 14% for the analyzed data period. The same bifacial module presented an overall efficiency of 23% and the monofacial module of 22%. The albedo of the substrate played an important role in the analysis of efficiency values, since the albedo of the pink gravel for the reference cell was approximately 8% while for the pyranometer it was 12.5%. The analyzes indicated that the energy gain in using the bifacial module is advantageous, but it still presents a behavior to be explored depending on the conditions of different substrates and albedos.
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References
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