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Holographic solar concentrators

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  • Hull, J.
  • Lauer, J.
  • Broadbent, D.

Abstract

The approach selected is the fabrication of holographic optical elements which will focus to either a line or a point. A concentrating mirror is replicated in the hologram, which consists of dichromate gelatin exposed to a laser beam. The dichromate gelatin can be processed to produce a non-uniform microstructure, which gives the hologram a significant waveband width. Even so, it becomes necessary to stack at least three holograms, with each reflecting a different region of the solar spectrum, if we are to reflect most of the solar energy. To achieve high efficiency, it is necessary to obtain adjacent quasi-square waves for the efficiency—wavelength profile of each of the holograms in the stack. Profile information was obtained by the use of a monochromator coupled to a computer. An optical efficiency in excess of 50% was measured for a three-hologram stack. This represents approximately 70% of the efficiency achievable within the limited measuring range of the monochromator. A line-focus holographic concentrator model has been built for demonstration purposes.

Suggested Citation

  • Hull, J. & Lauer, J. & Broadbent, D., 1987. "Holographic solar concentrators," Energy, Elsevier, vol. 12(3), pages 209-215.
    • Handle: RePEc:eee:energy:v:12:y:1987:i:3:p:209-215
    DOI: 10.1016/0360-5442(87)90079-X
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    Cited by:

    1. Sharaf, Omar Z. & Orhan, Mehmet F., 2015. "Concentrated photovoltaic thermal (CPVT) solar collector systems: Part I – Fundamentals, design considerations and current technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 1500-1565.
    2. Collados, M. Victoria & Chemisana, Daniel & Atencia, Jesús, 2016. "Holographic solar energy systems: The role of optical elements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 130-140.

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