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Research Papers

Demonstration of Infrared-Photovoltaics for a Full-Spectrum Solar Energy System

[+] Author and Article Information
Dan Dye1

Mechanical Engineering, Mail Stop 312, University of Nevada, Reno, NV 89557dye@unr.edu

Byard Wood

Mechanical and Aerospace Engineering, Utah State University, Logan, UT 84322-4130byard.wood@usu.edu

Lewis Fraas

 JX Crystals, Inc., 1105 12th Avenue NW, Suite A2, Issaquah, WA 98027lfraas@jxcrystals.com

Jeanette Kretschmer

Mechanical Engineering, Mail Stop 312, University of Nevada, Reno, NV 89557jkretsch@unr.edu

1

Corresponding author.

J. Sol. Energy Eng 128(1), 30-33 (May 12, 2005) (4 pages) doi:10.1115/1.2147587 History: Received May 19, 2004; Revised May 12, 2005

A nonimaging (NI) device and infrared-photovoltaic (IR-PV) array for use in a full-spectrum solar energy system has been designed, built, and tested (Dye, 2003, “Optical Design of an Infrared Non-Imaging Device for a Full-Spectrum Solar Energy System  ,” Proceedings of the ASME International Solar Energy Society Conference; Dye and Wood, 2003, Infrared Transmission Efficiency of Refractive and Reflective Non-Imaging Devices for a Full-Spectrum Solar Energy System  ,” Nonimaging Optics: Maximum Efficiency Light Transfer VII, Proc. SPIE, 5185; Fraas, 2001, Infrared Photovoltaics for Combined Solar Lighting and Electricity for Buildings  ,” Proceedings of 17th European Photovoltaic Solar Energy Conference}. This system was designed to utilize the otherwise wasted infrared (IR) energy that is separated from the visible portion of the solar spectrum before the visible light is harvested. The IR energy will be converted to electricity via a gallium antimonide (GaSb) IR-PV array. The experimental apparatus for the testing of the IR optics and IR-PV performance is described. Array performance data will be presented, along with a comparison between outdoor experimental tests and laboratory flash tests. An analysis of the flow of the infrared energy through the collection system will be presented, and recommendations will be made for improvements. The IR-PV array generated a maximum of 26.7W, demonstrating a conversion efficiency of the IR energy of 12%.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Full-spectrum solar collector

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Figure 2

IR-PV test system

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Figure 3

100 cell GaSb IR-PV array

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Figure 6

Energy flow chart

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