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A study on use of miniature dielectric compound parabolic concentrator (dCPC) for daylighting control application

Yu, Xu; Su, Yuehong; Zheng, Hongfei; Riffat, Saffa

Authors

Xu Yu

Yuehong Su

Hongfei Zheng

Saffa Riffat



Abstract

Low-concentration solid dielectric compound parabolic concentrator (dCPC) and its variations have been widely regarded as an attractive solution to reduce the cost of a photovoltaic (PV) system, particularly for building-integrated application. Different from a mirror CPC, a dCPC allows the light beyond its acceptance angle to penetrate through its lateral surface. This escaped light could be actually used for daylighting, so the dCPC offers a potential for combined PV and daylighting application suitable for the atrium buildings or large green houses. In the modern buildings, an advanced daylighting system such as prismatic panels is used to balance between harvesting daylight and preventing excessive solar heat gain. In contrast, this study aims to evaluate the advantage of the miniature solid dCPC over common prismatic structures according to their daylight transmittance values under both standard and real sky conditions. A commercial optical analysis software PHOTOPIA is firstly used to compare the daylighting control performance between a dCPC rod and two common prismatic elements. The effect of solar altitude and azimuth angles changing with time is considered. A preliminary test under a solar simulator and a real sky condition is also introduced to provide experimental evidence regarding the advantageous feature of a dCPC rod for daylighting control.

Journal Article Type Article
Publication Date Apr 1, 2014
Journal Building and Environment
Print ISSN 0360-1323
Electronic ISSN 1873-684X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 74
APA6 Citation Yu, X., Su, Y., Zheng, H., & Riffat, S. (2014). A study on use of miniature dielectric compound parabolic concentrator (dCPC) for daylighting control application. Building and Environment, 74, doi:10.1016/j.buildenv.2013.12.008
DOI https://doi.org/10.1016/j.buildenv.2013.12.008
Keywords Daylighting control; Dielectric compound parabolic concentrator (dCPC); Transmittance; Illuminance; PHOTOPIA simulation
Experimental measurement
Publisher URL https://www.sciencedirect.com/science/article/pii/S0360132313003636
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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