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Efficient tubular light guide with two-component glazing with Lambertian diffuser and clear glass

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  • Kocifaj, M.

Abstract

The performance as well as the illuminating abilities of a tubular light guide system furnished by two-component glazing on its base is analyzed. The glazing consists of two optical elements: a Lambertian diffuser and clear glass. The inner parts of circular glazing behave like Lambertian diffuser while the edges of the glazing are built of clear glass. The illuminance distributions on the two-component glazing and the workplane situated below the light guide are simultaneously calculated. The presented concept guarantees: an improved energy utilization, an enhanced interior light conditions (especially under low solar elevation conditions), and an eliminated light excesses which are typical for fully transparent optical interfaces.

Suggested Citation

  • Kocifaj, M., 2009. "Efficient tubular light guide with two-component glazing with Lambertian diffuser and clear glass," Applied Energy, Elsevier, vol. 86(7-8), pages 1031-1036, July.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:7-8:p:1031-1036
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    References listed on IDEAS

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    1. Elmualim, A. A. & Smith, S. & Riffat, S. B. & Shao, L., 1999. "Evaluation of dichroic material for enhancing light pipe/natural ventilation and daylighting in an integrated system," Applied Energy, Elsevier, vol. 62(4), pages 253-266, April.
    2. Al-Marwaee, Mohammed & Carter, David, 2006. "Tubular guidance systems for daylight: Achieved and predicted installation performances," Applied Energy, Elsevier, vol. 83(7), pages 774-788, July.
    3. Jenkins, David & Muneer, Tariq, 2004. "Light-pipe prediction methods," Applied Energy, Elsevier, vol. 79(1), pages 77-86, September.
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    Cited by:

    1. Cristina Baglivo & Marina Bonomolo & Paolo Maria Congedo, 2019. "Modeling of Light Pipes for the Optimal Disposition in Buildings," Energies, MDPI, vol. 12(22), pages 1-28, November.
    2. Freire, Roberto Zanetti & Mazuroski, Walter & Abadie, Marc Olivier & Mendes, Nathan, 2011. "Capacitive effect on the heat transfer through building glazing systems," Applied Energy, Elsevier, vol. 88(12), pages 4310-4319.
    3. Li, Danny H.W. & Tsang, Ernest K.W. & Cheung, K.L. & Tam, C.O., 2010. "An analysis of light-pipe system via full-scale measurements," Applied Energy, Elsevier, vol. 87(3), pages 799-805, March.
    4. Darula, Stanislav & Kittler, Richard & Kocifaj, Miroslav, 2010. "Luminous effectiveness of tubular light-guides in tropics," Applied Energy, Elsevier, vol. 87(11), pages 3460-3466, November.
    5. Marmoush, Mohamed M. & Rezk, Hegazy & Shehata, Nabila & Henry, Jean & Gomaa, Mohamed R., 2018. "A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study," Renewable Energy, Elsevier, vol. 125(C), pages 947-961.

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