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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S3 — May. 5, 2014
  • pp: A895–A907

Illumination of dense urban areas by light redirecting panels

Sally I. El-Henawy, Mohamed W. N. Mohamed, Islam A. Mashaly, Osama N. Mohamed, Ola Galal, Iman Taha, Khaled Nassar, and Amr M. E. Safwat  »View Author Affiliations

Optics Express, Vol. 22, Issue S3, pp. A895-A907 (2014)

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With the high population growth rate, especially in developing countries, and the scarcity of land resources, buildings are becoming so close to each other, depriving the lower floors and the alleys from sunlight and consequently causing health problems. Therefore, there is an urgent need for cost-effective efficient light redirecting panels that guide sun rays into those dim places. In this paper, we address this problem. A novel sine wave based panel is presented to redirect/diverge light downward and enhance the illumination level in those dark places. Simulation results show that the proposed panel improves the illuminance values by more than 200% and 400% in autumn and winter respectively, operates over wide solar altitude ranges, and redirects light efficiently. Experimental and simulation results are in good agreement.

© 2014 Optical Society of America

OCIS Codes
(260.3800) Physical optics : Luminescence
(350.4600) Other areas of optics : Optical engineering
(350.6050) Other areas of optics : Solar energy
(290.1483) Scattering : BSDF, BRDF, and BTDF
(220.2945) Optical design and fabrication : Illumination design
(080.4295) Geometric optics : Nonimaging optical systems
(080.4298) Geometric optics : Nonimaging optics

ToC Category:
Illumination Design

Original Manuscript: January 24, 2014
Revised Manuscript: February 25, 2014
Manuscript Accepted: March 3, 2014
Published: April 14, 2014

Sally I. El-Henawy, Mohamed W. N. Mohamed, Islam A. Mashaly, Osama N. Mohamed, Ola Galal, Iman Taha, Khaled Nassar, and Amr M. E. Safwat, "Illumination of dense urban areas by light redirecting panels," Opt. Express 22, A895-A907 (2014)

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