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Application of high-density daylight for indoor illumination

Author

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  • Han, Hyunjoo
  • Tai Kim, Jeong

Abstract

A fiber optic solar concentrator system with a simple parabolic profile is designed and fabricated to deliver a stream of high-density solar flux into the interior of a building for indoor illumination. The system consists of a small dish concentrator (30cm in diameter), an optical fiber cable and a diffuser at the end. A series of tests are performed using a goniophotometer and spectrometer to investigate the photometric characteristics of the system in terms of luminous intensity distribution and spectral radiance, which are used in link with the actual photometric measurements for a lightless mock-up space of 4.9m×4.9m×2.6m. The illuminance on the working plane was continuously monitored at 25 points by using photometric sensors. Measurements clearly indicate the photometric characteristics of the present system where a constant level of indoor illumination is observed depending on the sky clearness.

Suggested Citation

  • Han, Hyunjoo & Tai Kim, Jeong, 2010. "Application of high-density daylight for indoor illumination," Energy, Elsevier, vol. 35(6), pages 2654-2666.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:6:p:2654-2666
    DOI: 10.1016/j.energy.2009.05.037
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    References listed on IDEAS

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    1. Spencer Dutton & Li Shao, 2007. "Raytracing simulation for predicting light pipe transmittance," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 2(4), pages 339-358, October.
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    Cited by:

    1. Kunhao Liu & Lianglin Zou & Yuanlong Li & Kai Wang & Haiyu Wang & Jifeng Song, 2023. "Measurement and Analysis of Light Leakage in Plastic Optical Fiber Daylighting System," Sustainability, MDPI, vol. 15(4), pages 1-14, February.
    2. Firat, C. & Beyene, A., 2012. "Comparison of direct and indirect PV power output using filters, lens, and fiber transport," Energy, Elsevier, vol. 41(1), pages 271-277.
    3. Jifeng Song & Bizuayehu Bogale Dessie & Longyu Gao, 2023. "Analysis and Comparison of Daylighting Technologies: Light Pipe, Optical Fiber, and Heliostat," Sustainability, MDPI, vol. 15(14), pages 1-30, July.
    4. Sreelakshmi, Kavuthimadathil & Ramamurthy, K., 2022. "Review on fibre-optic-based daylight enhancement systems in buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 163(C).
    5. Barbón, A. & Sánchez-Rodríguez, J.A. & Bayón, L. & Barbón, N., 2018. "Development of a fiber daylighting system based on a small scale linear Fresnel reflector: Theoretical elements," Applied Energy, Elsevier, vol. 212(C), pages 733-745.

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