1000x shadow-free mirror-based Köhler concentrator

Hernández Sanz, Maikel; Benitez Gimenez, Pablo; Mendes Lopes, Joao; Cvetkovic, Aleksandra; Sun, Y.; Miñano Dominguez, Juan Carlos; Chaves, Julio y Mohedano, Rubén (2012). 1000x shadow-free mirror-based Köhler concentrator. En: "Proc. SPIE, Optics & Photonics - Solar Energy + Applications", 12-08-2012, San Diego (California), USA.


Título: 1000x shadow-free mirror-based Köhler concentrator
  • Hernández Sanz, Maikel
  • Benitez Gimenez, Pablo
  • Mendes Lopes, Joao
  • Cvetkovic, Aleksandra
  • Sun, Y.
  • Miñano Dominguez, Juan Carlos
  • Chaves, Julio
  • Mohedano, Rubén
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Proc. SPIE, Optics & Photonics - Solar Energy + Applications
Fechas del Evento: 12-08-2012
Lugar del Evento: San Diego (California), USA
Título del Libro: Proc. SPIE, Optics & Photonics - Solar Energy + Applications
Fecha: 10 Octubre 2012
Volumen: 8468 -
Escuela: Centro de Domótica Integral (CeDInt) (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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A new design for a photovoltaic concentrator, the most recent advance based on the Kohler concept, is presented. The system is mirror-based, and with geometry that guaranties a maximum sunlight collection area (without shadows, like those caused by secondary stages or receivers and heat-sinks in other mirror-based systems). Designed for a concentration of 1000x, this off axis system combines both good acceptance angle and good irradiance uniformity on the solar cell. The advanced performance features (concentration-acceptance products ?CAP- about 0.73 and affordable peak and average irradiances) are achieved through the combination of four reflective folds combined with four refractive surfaces, all of them free-form, performing Köhler integration 2 . In Köhler devices, the irradiance uniformity is not achieved through additional optical stages (TIR prisms), thus no complex/expensive elements to manufacture are required. The rim angle and geometry are such that the secondary stage and receivers are hidden below the primary mirrors, so maximum collection is assured. The entire system was designed to allow loose assembly/alignment tolerances (through high acceptance angle) and to be manufactured using already well-developed methods for mass production, with high potential for low cost. The optical surfaces for Köhler integration, although with a quite different optical behavior, have approximately the same dimensions and can be manufactured with the same techniques as the more traditional secondary optical elements used for concentration (typically plastic injection molding or glass molding).

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ID de Registro: 20077
Identificador DC: http://oa.upm.es/20077/
Identificador OAI: oai:oa.upm.es:20077
URL Oficial: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1377839
Depositado por: Memoria Investigacion
Depositado el: 24 Sep 2013 18:07
Ultima Modificación: 22 Sep 2014 11:18
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