Measurement and Analysis of Light Leakage in Plastic Optical Fiber Daylighting System

Kunhao Liu, Lianglin Zou, Yuanlong Li, Kai Wang, Haiyu Wang and Jifeng Song ()
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Kunhao Liu: School of New Energy, North China Electric Power University, Beijing 102206, China
Lianglin Zou: School of New Energy, North China Electric Power University, Beijing 102206, China
Yuanlong Li: School of New Energy, North China Electric Power University, Beijing 102206, China
Kai Wang: School of New Energy, North China Electric Power University, Beijing 102206, China
Haiyu Wang: School of New Energy, North China Electric Power University, Beijing 102206, China
Jifeng Song: Institute of Energy Power Innovation, North China Electric Power University, Beijing 102206, China

Sustainability, 2023, vol. 15, issue 4, 1-14

Abstract: The daylighting systems via polymethylmethacrylate (PMMA) plastic optical fibers have obvious cost advantages and have been widely studied. However, there is light leakage when PMMA optical fibers transmit concentrated sunlight, resulting in a transmission efficiency lower than the theoretical value. This research aims to quantitatively study the light leakage effect of PMMA optical fibers. Concentrated sunlight was used as the sunlight source instead of a monochromatic laser. An adjustable diaphragm was used to adjust the angle of the incident light, and the infrared filter and heat-absorbing glass were used to solve the overheating problem of PMMA fibers. The results show that when the incident angle is greater than 13°, the relative transmission efficiency of the fibers drops rapidly, which means that the light leakage deteriorates. The data also show that the angle of the output beam of PMMA optical fibers is ±30°, which is independent of the angle of the incident beam. Based on this conclusion, a PMMA optical fiber daylighting system with an incident angle of 13° was developed, which has higher transmission efficiency than previously developed systems. This study indicates that the angle effect of light leakage should be considered in the design of a plastic optical fiber daylighting system.

Keywords: light leakage; daylighting system; plastic optical fibers; light distribution (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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