Optical Design and Engineering

Design and indoor testing of a compact optical concentrator

[+] Author Affiliations
Cheng Zheng

University of New South Wales, School of Photovoltaic and Renewable Energy Engineering, Building H6, Kensington, NSW 2052, Australia

Qiyuan Li

University of New South Wales, School of Mechanical and Manufacturing Engineering, Gate 14, Barker Street, Kensington, NSW 2052, Australia

Gary Rosengarten

Royal Melbourne Institute of Technology, School of Aerospace, Mechanical and Manufacturing Engineering, Building 57, Carlton, Victoria 3000, Australia

Evatt Hawkes, Robert A. Taylor

University of New South Wales, School of Photovoltaic and Renewable Energy Engineering, Building H6, Kensington, NSW 2052, Australia

University of New South Wales, School of Mechanical and Manufacturing Engineering, Gate 14, Barker Street, Kensington, NSW 2052, Australia

Opt. Eng. 56(1), 015102 (Jan 10, 2017). doi:10.1117/1.OE.56.1.015102
History: Received September 12, 2016; Accepted December 20, 2016
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Abstract.  We propose and analyze designs for stationary and compact optical concentrators. The designs are based on a catadioptric assembly with a linear focus line. They have a focal distance of around 10 to 15 cm with a concentration ratio (4.5 to 5.9 times). The concentrator employs an internal linear-tracking mechanism, making it suitable for rooftop solar applications. The optical performance of the collector has been simulated with ray tracing software (Zemax), and laser-based indoor experiments were carried out to validate this model. The results show that the system is capable of achieving an average optical efficiency of around 66% to 69% during the middle 6 (sunniest) h of the day. The design process and principles described in this work will help enable a new class of rooftop solar thermal concentrators.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Cheng Zheng ; Qiyuan Li ; Gary Rosengarten ; Evatt Hawkes and Robert A. Taylor
"Design and indoor testing of a compact optical concentrator", Opt. Eng. 56(1), 015102 (Jan 10, 2017). ; http://dx.doi.org/10.1117/1.OE.56.1.015102


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