Development of daylighting systems with non-imaging concentrator

Ngoc Hai Vu; Seoyong Shin

doi:10.1117/12.2189159

25 August 2015 Development of daylighting systems with non-imaging concentrator

Ngoc Hai Vu, Seoyong Shin

Proceedings Volume 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII; 95720P (2015) https://doi.org/10.1117/12.2189159
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

We present a cost-effective and large scale optical fiber daylighting system using non-imaging optics device such as array of linear Fresnel lenses and stepped-thickness waveguide as concentrator. The stepped-thickness waveguide is an optical component that can redirect focused sunlight from vertical to horizontal and guide light to the optical fiber. Our simulation results demonstrate an optical efficiency of up to 56.4% when the concentration ratio of the system is fixed at 100. The simulation also shows that this design has high tolerance for input angle of sunlight. The high tolerance allows replacing a dual axis sun tracking system with a single axis sun-tracking system as a cost-effective solution. Therefore, our results provide an important breakthrough for the commercialization of optical fiber daylighting systems that are faced with challenges related to high costs.

Citation Download Citation

Ngoc Hai Vu and Seoyong Shin "Development of daylighting systems with non-imaging concentrator", Proc. SPIE 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII, 95720P (25 August 2015); https://doi.org/10.1117/12.2189159

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