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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 21, Iss. S6 — Nov. 4, 2013
  • pp: A942–A952

Design and testing of a uniformly solar energy TIR-R concentration lenses for HCPV systems

S. C. Shen, S. J. Chang, C. Y. Yeh, and P. C. Teng  »View Author Affiliations

Optics Express, Vol. 21, Issue S6, pp. A942-A952 (2013)

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In this paper, total internal reflection-refraction (TIR-R) concentration (U-TIR-R-C) lens module were designed for uniformity using the energy configuration method to eliminate hot spots on the surface of solar cell and increase conversion efficiency. The design of most current solar concentrators emphasizes the high-power concentration of solar energy, however neglects the conversion inefficiency resulting from hot spots generated by uneven distributions of solar energy concentrated on solar cells. The energy configuration method proposed in this study employs the concept of ray tracing to uniformly distribute solar energy to solar cells through a U-TIR-R-C lens module. The U-TIR-R-C lens module adopted in this study possessed a 76-mm diameter, a 41-mm thickness, concentration ratio of 1134 Suns, 82.6% optical efficiency, and 94.7% uniformity. The experiments demonstrated that the U-TIR-R-C lens module reduced the core temperature of the solar cell from 108 °C to 69 °C and the overall temperature difference from 45 °C to 10 °C, and effectively relative increased the conversion efficiency by approximately 3.8%. Therefore, the U-TIR-R-C lens module designed can effectively concentrate a large area of sunlight onto a small solar cell, and the concentrated solar energy can be evenly distributed in the solar cell to achieve uniform irradiance and effectively eliminate hot spots.

© 2013 OSA

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(150.2945) Machine vision : Illumination design

ToC Category:
Solar Concentrators

Original Manuscript: May 20, 2013
Revised Manuscript: July 25, 2013
Manuscript Accepted: September 10, 2013
Published: September 18, 2013

S. C. Shen, S. J. Chang, C. Y. Yeh, and P. C. Teng, "Design and testing of a uniformly solar energy TIR-R concentration lenses for HCPV systems," Opt. Express 21, A942-A952 (2013)

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