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Proceedings Paper

CPV and illumination systems based on XR-Köhler devices
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Paper Abstract

The XR-Köhler concentrator1 is a design that has the possibility to work under high concentration, maintaining the high acceptance angle and high irradiance uniformity on the solar cell. It is an on-axis free-form design that consists of a reflective (X) and refractive (R) surface. For a geometrical concentration of about 800x the simulated results show an acceptance angle of ±1.79deg with high irradiance uniformity on the solar cell. This article shows the design results of the XR-Köhler and also a novel passive cooling system (LPI patented) that keeps the solar cell operation temperature under 100°C at extreme conditions (wind speed = 0 m/s, module tilt angle = 45deg and Ta = 50°C). The results of using the XR-Köhler device as a collimator when the light source has very high non-uniform luminance distribution, i.e. multichip LEDs, are also here presented.

Paper Details

Date Published: 18 August 2010
PDF: 11 pages
Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 77850A (18 August 2010); doi: 10.1117/12.861968
Show Author Affiliations
Maikel Hernandez, Light Prescriptions Innovators Europe, S. L. (Spain)
Aleksandra Cvetkovic, Light Prescriptions Innovators Europe, S. L. (Spain)
Pablo Benitez, Light Prescriptions Innovators Europe, S. L. (Spain)
Univ. Politécnica de Madrid (Spain)
Juan Carlos Miñano, Light Prescriptions Innovators Europe, S. L. (Spain)
Univ. Politécnica de Madrid (Spain)
Waqidi Falicoff, Light Prescriptions Innovators, LLC (United States)
Yupin Sun, Light Prescriptions Innovators, LLC (United States)
Julio Chaves, Light Prescriptions Innovators Europe, S. L. (Spain)
Ruben Mohedano, Light Prescriptions Innovators Europe, S. L. (Spain)


Published in SPIE Proceedings Vol. 7785:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII
Roland Winston; Jeffrey M. Gordon, Editor(s)

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