Holographic Solar CPV Module at US$ 0.50 per Watt
| Autor: | Rodríguez San Segundo, H.-J., Villamarín Villegas, A.M., Calo López, A. |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.4229/28theupvsec2013-1cv.2.15 |
| Popis: | 28th European Photovoltaic Solar Energy Conference and Exhibition; 484-488 A new design of a 3D concentrated photovoltaic (CPV) module is presented, whose key characteristic is the use of holograms as optic concentrating devices in a mix with other elements. The concept applies very low concentration (below 10 suns) while keeping the dimensions of a conventional flat silicon photovoltaic module. The whole system results in very low weight, being made of polymeric materials, and, besides, it avoids the need for aluminum frames or external grips, as rigidity is ensured by the structure itself, and the possible plastic injection in molds allows to directly providing the base with any gripping system. Also interconnection between cells can be extruded in the plastic mold. Several 3D unitary structures concentrate solar light onto the solar cells, thus covering the whole seasonal and daily incident angle spectrum with no need for active tracking of the sun. The thickness of such a structure is very reduced due to the fact that it takes advantage of not only one, but three optical elements within the 3D structure: on the plastic base a highly reflective surface is placed, followed by a wide angular and spectral broadband reflection hologram, and a transparent optical medium, with both refraction index n and inclination angle such that it traps light by Total Internal Reflection (TIR). Thus, the optical losses are greatly reduced and a concentration factor of up to 3X (trackless) can be achieved. First results look promising. Due to all these properties and a cheap assembly process, series production of such a module could be started as of today at a non-optimized selling price of USD 0.66 per watt, USD 0.50 per watt if upscaled into an optimized industrial environment. |
| Databáze: | OpenAIRE |
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