Non-uniform illumination in low concentration photovoltaic systems based on small-scale linear Fresnel reflectors

A. Barbón, P. Fortuny Ayuso, L. Bayón and J.A. Fernández-Rubiera

Energy, 2022, vol. 239, issue PC

Abstract: Low concentration photovoltaic systems improve performance by absorbing and concentrating more sunlight than non-concentration ones. However, they require uniform illumination of the PV cells, as their electrical performance can decrease dramatically otherwise. A thorough analysis of the design causes of non-uniform illumination in small-scale linear Fresnel reflectors (SSLFR) is carried out, yielding the main parameters to be optimized. Then, such an optimized SSLFR guaranteeing uniform illumination is designed, and an optimum operation interval is estimated during which, furthermore, neither shading nor blocking on the mirrors happens. The study requires computing the maximum optimal transverse incidence angle, θt0, whose influence on the time-span of optimum operation, width of the SSLFR, annual solar irradiation, width of the mirrors, and position of the mirrors is also studied. We include a detailed example showing the accuracy of our calculations, using Monte Carlo Ray Tracing.

Keywords: Low concentration photovoltaic systems; Small-scale linear Fresnel reflectors; Non-uniform illumination; Hot-spot (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:239:y:2022:i:pc:s0360544221024658

DOI: 10.1016/j.energy.2021.122217

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