Energy analysis of holographic lenses for solar concentration

Julia Marín-Sáez; M. Victoria Collados; Daniel Chemisana; Jesús Atencia

doi:10.1117/12.2265816

15 May 2017 Energy analysis of holographic lenses for solar concentration

Julia Marín-Sáez, M. Victoria Collados, Daniel Chemisana, Jesús Atencia

Proceedings Volume 10233, Holography: Advances and Modern Trends V; 1023317 (2017) https://doi.org/10.1117/12.2265816
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

The use of volume and phase holographic elements in the design of photovoltaic solar concentrators has become very popular as an alternative solution to refractive systems, due to their high efficiency, low cost and possibilities of building integration. Angular and chromatic selectivity of volume holograms can affect their behavior as solar concentrators. In holographic lenses, angular and chromatic selectivity varies along the lens plane. Besides, considering that the holographic materials are not sensitive to the wavelengths for which the solar cells are most efficient, the reconstruction wavelength is usually different from the recording one. As a consequence, not all points of the lens work at Bragg condition for a defined incident direction or wavelength. A software tool that calculates the direction and efficiency of solar rays at the output of a volume holographic element has been developed in this study. It allows the analysis of the total energy that reaches the solar cell, taking into account the sun movement, the solar spectrum and the sensitivity of the solar cell. The dependence of the recording wavelength on the collected energy is studied with this software. As the recording angle is different along a holographic lens, some zones of the lens could not act as a volume hologram. The efficiency at the transition zones between volume and thin behavior in lenses recorded in Bayfol HX is experimentally analyzed in order to decide if the energy of generated higher diffraction orders has to be included in the simulation.

Conference Presentation

Citation Download Citation

Julia Marín-Sáez, M. Victoria Collados, Daniel Chemisana, and Jesús Atencia "Energy analysis of holographic lenses for solar concentration", Proc. SPIE 10233, Holography: Advances and Modern Trends V, 1023317 (15 May 2017); https://doi.org/10.1117/12.2265816

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