Solar internal lighting system with an automated solar tracker for daylight harvesting

Kumar, Upkar; Raj, R. Shiny; Aaryan, Animesh; Gopalan, Kavitha K.; Nampoori, V. P. N.

doi:10.1117/12.2028079

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…Biconvex lenses can help block UV radiation and have a better ability than single convex lenses in concentrating light (Andre & Schade, 2002) as described in Figure 4. The collector's size in this study takes a reference from Kumar et al (2013) research. He found that with a lens diameter of 50 cm and a focal length of 35 cm, the resulting temperature was 130 degrees Celsius, lower than other types and sizes of collectors as described in Sreelakshmi & Ramamurthy, (2022).…”

Section: Fiber Optic Daylightingmentioning

confidence: 99%

Daylight Performance of Fiber Optic Daylighting in Deep Plan Office Room

Angelica,

Arifin,

Elsiana

2023

dimensi

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Most buildings have spaces far from the windows that require artificial lighting for illumination throughout the day. In fact, artificial lighting contributes to the second highest electrical energy consumption, especially in educational institutions that require more lighting. One of the appropriate solutions to illuminate areas far from windows is using a fiber optic daylighting system. FOD is used to distribute sunlight into the spaces away from the window. This research tested the lighting levels produced by alternative collector and diffuser models of FOD systems to meet the lighting level standards (lux) in discussion room P. 06. 05. Petra Christian University. This research uses experimental methods under actual weather exposure and simulation with DIALux software. Simulation results show that the room requires 6 collectors and 2 diffusers, arranged centrally and symmetrically. It produces 365 lux and a uniformity ratio of 0.59, which meets the standard. The lighting level data used was at 10:30 AM during partially cloudy conditions.

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Section: Fiber Optic Daylightingmentioning

confidence: 99%

Daylight Performance of Fiber Optic Daylighting in Deep Plan Office Room

Angelica,

Arifin,

Elsiana

2023

dimensi

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Indoor daylighting using Fresnel lens solar-concentrator-based hybrid cylindrical luminaire for illumination and water heating

et al. 2020

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Abundant availability of sunlight during daytime and the broad spectrum of solar energy has attracted much attention from researchers. The photometric parameters of sunlight such as color coordinates, color rendering index, and color temperature are most appropriate for human vision as compared to artificial light sources. This is due to the fact that visible portion of sunlight is almost uniform and matches perfectly with the human eye sensitivity curve. Further, it is well known that sunlight also has great health benefits. To exploit these advantages, we have developed a solar concentrator system based on a large Fresnel lens and a light guide to transport sunlight indoors. The infrared portion of solar energy is utilized for water heating, and the visible portion of sunlight is transmitted via a plastic optical fiber (POF) bundle which guides sunlight into the rooms. One end of the POF is coupled with a light guide, and another end is coupled with a cylindrical rod-shaped luminaire made up of acrylic. POFs are low cost, flexible, and easily available compared to glass fibers, and therefore are generally used for transporting sunlight indoors. However, the spectral profile of transmitted sunlight does not remain uniform in the visible portion while propagating via long POF. To achieve optimum spectral profile, a blue LED is ingrooved into the cylindrical luminaire. The design of the system, experimental details, thermal efficiency, and photometric parameters such as color coordinates, illuminance, optical efficiency, and spectrum of indoor lighting are reported. The proposed hybrid system will reduce the requirement of electricity consumption during the daytime, improve indoor illumination quality, and be useful for sustainable development.

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Solar internal lighting system with an automated solar tracker for daylight harvesting

Cited by 2 publications

References 2 publications

Daylight Performance of Fiber Optic Daylighting in Deep Plan Office Room

Daylight Performance of Fiber Optic Daylighting in Deep Plan Office Room

Indoor daylighting using Fresnel lens solar-concentrator-based hybrid cylindrical luminaire for illumination and water heating

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