10 January 2017 Design and indoor testing of a compact optical concentrator
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Cheng Zheng, Cheng Zheng, Qiyuan Li, Qiyuan Li, Gary Rosengarten, Gary Rosengarten, Evatt Hawkes, Evatt Hawkes, Robert A. Taylor, Robert A. Taylor, } "Design and indoor testing of a compact optical concentrator," Optical Engineering 56(1), 015102 (10 January 2017). https://doi.org/10.1117/1.OE.56.1.015102 . Submission: Received: 12 September 2016; Accepted: 20 December 2016
Received: 12 September 2016; Accepted: 20 December 2016; Published: 10 January 2017

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