18 August 2010 Performance comparison of Fresnel-based concentrator arrays
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At module level (one single solar cell), the Fresnel-Köhler (FK) concentrator comprises a perfect irradiance uniformity along with quite high concentration-acceptance angle product. At the same time, it maintains the efficiency/simplicity of other Fresnel-based concentrators. In this work we will show the FK concentrator has loose manufacturing tolerances as well. All these facts, along with the pill-box shape of its transmission curve, permit an enhanced performance of this device, compared to its competitors, at array level, because the system is more insensitive to manufacturing errors, and current mismatch is less likely to occur. Or the same performance can be achieved at a lower cost, exhausting the tolerance budget by using inexpensive fabrication techniques. Depending on the concentrator, the actual power delivered by an array might drop significantly with respect to the sum of the power delivered by single modules. Under certain circumstances, the FK can reach a 1-10% electrical efficiency increase with regards to other concentrators sharing the same technology.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rubén Mohedano, Rubén Mohedano, Aleksandra Cvetkovic, Aleksandra Cvetkovic, Pablo Benítez, Pablo Benítez, Pablo Zamora, Pablo Zamora, Juan C. Miñano, Juan C. Miñano, Julio Chaves, Julio Chaves, Maikel Hernandez, Maikel Hernandez, Marina Buljan, Marina Buljan, Juan Vilaplana, Juan Vilaplana, } "Performance comparison of Fresnel-based concentrator arrays", Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 778508 (18 August 2010); doi: 10.1117/12.862253; https://doi.org/10.1117/12.862253

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