Modelling Large Diameter Solid Core Optical Fiber for Passive Daylighting

F. Sulaiman, A. Ahmad, and A.Z. Ahmed (Malaysia)


Fiber optic daylighting, daylight collector, light transmission efficiency


One of the most direct methods of utilizing solar energy for energy conservation is to bring natural light indoors to light up an area. This research investigated the feasibility to utilize large core optical fibers to convey and distribute solar light passively throughout residential or commercial structures. The research study consists of the mathematical modeling on the light transmission efficiency of solid core end light durafiber for the optical daylighting system. The MATLAB simulations features the fiber transmittance, spectral light transmission efficiency through the large diameter solid core endlight fibers as well as the loss in light intensity in the fiber itself. The research contributes to the Renewable Energy field by advancing applied research through the investigation of large diameter fiber optic cable for transmission of solar light. From the research analysis it is found that the use of large diameter optical fibers for daylighting systems is feasible for energy conservation and energy efficient lighting system in commercial or residential buildings. Technological advancement in correctly designed daylighting system can filter away unwanted heat in the light and supply the heat to the building. Other benefits of daylighting include health advantages and psychological benefits that have been shown in many studies. Some concrete examples are less absenteesiem at work places and better performance by students in daylighted schools. The energy cost of a daylighted school was reduced between 22% and 64% as compared to normal school [1]. In commercial and public buildings 40% to 50% of energy consumption accounts for artificial light, with 10% to 20% of energy consumption in industry. The energy consumption can be reduced considerably by using daylighting in combination of energy efficient lighting. The lighting power intensity can be reduced by using daylight in some office buildings by 23.7 W/m2 to 9.5W/m2 without any reduction in the measured light level [2].

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