Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Freeform Fresnel RXI-RR Köhler design with spectrum-splitting for photovoltaics
Year:2011
Research Areas
  • Engineering
Information
Abstract
The development of a novel optical design for the high concentration photovoltaics (HPCV) nonimaging concentrator (>500x) that utilizes a built-in spectrum splitting concept is presented. The primary optical element (POE) is a flat Fresnel lens and the secondary optical element (SOE) is a free-form RXI-type concentrator with a band-pass filter embedded in it. The POE and SOE perform Köhler integration to produce light homogenization on the receiver. The system uses a combination of a commercial concentration GaInP/GaInAs/Ge 3J cell and a concentration Back-Point-Contact (BPC) silicon cell for efficient spectral utilization, and an external confinement technique for recovering the 3J cell?s reflection. A design target of an ?equivalent? cell efficiency ~46% is predicted using commercial 39% 3J and 26% Si cells. A projected CPV module efficiency of greater than 38% is achievable at a concentration level greater than 500X with a wide acceptance angle of ±1º. A first proof-of concept receiver prototype has been manufactured using a simpler optical architecture (with a lower concentration, ~100x and lower simulated added efficiency), and experimental measurements have shown up to 39.8% 4J receiver efficiency using a 3J cell with a peak efficiency of 36.9%.
International
Si
Congress
Optical Design and Engineering IV
960
Place
Marsella, Francia
Reviewers
Si
ISBN/ISSN
0277-786X
Start Date
05/09/2011
End Date
08/09/2011
From page
1
To page
9
PROCEEDINGS OF SPIE Volume 8167 Proceedings of SPIE, 0277-786X, v. 8167 Optical Design and Engineering IV
Participants
  • Autor: Marina Buljan . (UPM)
  • Autor: Pablo Benitez Gimenez (UPM)
  • Autor: Ruben Mohedano (Externo)
  • Autor: Juan Carlos Miñano Dominguez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería Óptica
  • Centro o Instituto I+D+i: Centro de Domótica Integral, CEDINT
  • Departamento: Electrónica Física
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