Review on fibre-optic-based daylight enhancement systems in buildings

Sreelakshmi, Kavuthimadathil; Ramamurthy, K.

doi:10.1016/j.rser.2022.112514

Cited by 15 publications

(13 citation statements)

References 71 publications

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“…Another successful implementation involved an optical fiber solar concentrator, which proved its effectiveness in a tropical environment. This system comprised a PMMA (Polymethylmethacrylate) plate and 150 three-color fluorescent fibers [21].…”

Section: Daylightingmentioning

confidence: 99%

Potentials of Fibre Optic Daylighting Systems in Najran University College of Engineering Corridors

2024

nano-ntp

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Effective use of natural light in buildings significantly reduces energy consumption by minimizing the need for artificial lighting. This study investigates daylight wastage in Najran University's College of Engineering due to insufficient policy implementation and underutilization of daylight technology during the design phase, despite ample available daylight. Using a mixed-method approach, the study found that 42.6% strongly agreed, and 57.6% agreed that daylight is wasted, while 21% had no opinion on this matter. Regarding technology, 42.4% both strongly agreed and agreed, but 54.5% did not know about fiber optic daylight system (FODS) harvesting. Policy implementation is crucial, with 42.4% having no awareness of daylight legislation, and 45.5% not having used daylighting codes before. Interestingly, 48.5% agreed, and 36.4% strongly agreed with the significance of daylighting in LEED and MOSTADAM ratings in Saudi Arabia. Observations indicated that roof-mounted daylight collectors using fiber optics were most effective throughout the day, followed by walls, particularly on the northern and southern facades. Basements were the least favorable due to limited access to daylight. In conclusion, this study highlights the potential of fiber optics for daylight harvesting, whether in retrofitting or new building design, given the region's abundant daylight.

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Section: Daylightingmentioning

confidence: 99%

Potentials of Fibre Optic Daylighting Systems in Najran University College of Engineering Corridors

2024

nano-ntp

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“…Various options exist for optical position sensors, with many of them employing detectors positioned in front of solar radiation, featuring exposed areas larger than one hundred square millimeters [ 18 ]. However, these sensors have certain drawbacks.…”

Section: Introductionmentioning

confidence: 99%

A Proposal for a Solar Position Sensor System with Multifiber Optical Cable

Oliveira,

Cruz,

Barbosa

et al. 2024

Sensors

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A solar position sensor is an essential optoelectronic device used to monitor the sun’s position in solar tracking systems. In closed-loop systems, this sensor is responsible for providing feedback signals to the control system, allowing motor adjustments to optimize the angle of incidence and minimize positioning errors. The accuracy required for solar tracking systems varies depending on the specific photovoltaic concentration. In the case of the concentrator photovoltaic (CPV), it is normally essential to track the sun with a position error of less than ±0.6°. To achieve such precision, a proposed sensor configuration composed of low-cost embedded electronics and multifiber optical cable is subjected to characterization through a series of measurements covering range, sensitivity, and resolution. These measurements are performed in controlled indoor environments as well as outdoor conditions. The results obtained exhibit a resolution of 2.6×10−3 degrees when the sensor is illuminated within its designated field of view of ±0.1°, particularly in external conditions. Considering the performance demonstrated by the proposed solar position sensor, coupled with its straightforward modeling and assembly compared to position sensors documented in the literature, it emerges as a promising candidate for integration into solar tracking systems.

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“…Thus, ways to compensate for electrical lighting must be proposed. (2) Guaranteed visual [18] or driving safety with the combination of natural lighting and electrical lighting must be ensured.…”

Section: Introductionmentioning

confidence: 99%

On-Demand Tunnel Lighting System Utilizing Daylight: A Case Study

Shi

Wang

et al. 2023

Sustainability

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Owing to the special tubular structural characteristics of highway tunnels, drivers typically experience a significant change in visual luminance when entering tunnels, which seriously impacts driving safety. This paper proposes a lighting scheme based on optical fiber technology to introduce natural light into the tunnel portal section. First, an on-demand lighting scheme based on the use of daylight is designed by developing an optical fiber lighting system, lighting demand algorithm, and an on-demand lighting control scheme. Furthermore, the scheme is applied to a physical tunnel, and the safety and energy-saving potential of the scheme are analyzed based on the obtained data. The results indicate that the average luminance and luminance uniformity in the tunnel portal section appear to improve with the application of the proposed scheme; the luminance uniformity is particularly increased by 0.18. The correlative color temperature (CCT) of the environment inside the cave changes in real time with the CCT value of the phase pair outside the cave. Compared with the explicit use of electrical lighting, the lighting energy consumption during daytime can be reduced by 34.7% with the application of the proposed scheme, and the highest reduction of 79.8% can be achieved at 13:00.

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Review on fibre-optic-based daylight enhancement systems in buildings

Cited by 15 publications

References 71 publications

Potentials of Fibre Optic Daylighting Systems in Najran University College of Engineering Corridors

Potentials of Fibre Optic Daylighting Systems in Najran University College of Engineering Corridors

A Proposal for a Solar Position Sensor System with Multifiber Optical Cable

On-Demand Tunnel Lighting System Utilizing Daylight: A Case Study

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