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Proceedings Paper

Development of daylighting systems with non-imaging concentrator
Author(s): Ngoc Hai Vu; Seoyong Shin
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Paper 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.

Paper Details

Date Published: 25 August 2015
PDF: 8 pages
Proc. SPIE 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII, 95720P (25 August 2015); doi: 10.1117/12.2189159
Show Author Affiliations
Ngoc Hai Vu, Myongji Univ. (Korea, Republic of)
Seoyong Shin, Myongji Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9572:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII
Roland Winston; Jeffrey M. Gordon, Editor(s)

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