International Journal of Internet, Broadcasting and Communication

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Development of Daylighting System with Modified Light Pipe for Longer Transmission Distance and Higher Illuminance

  • Received : 2021.02.24
  • Accepted : 2021.03.05
  • Published : 2021.05.31
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Abstract

In this research, we present a natural lighting system with transmission distance of 30m and lighting efficiency of 35% (30m standard) for operating hours of 7h/day (based on clear sky). The system is composed of parabolic reflective mirror and modified light pipe that can secure more than 88% of light concentration efficiency. The light loss rate of newly designed light pipe transmission system is demonstrated to 0.8 %/m in the straight-line part and 2%/m in the curved part. Modified light pipe daylighting system shows better performance over fiber optic daylighting system in terms of transmission distance (1.5 times longer) and illuminance (3.05 times higher).

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Acknowledgement

Project Name: Advancement of performance and safety technology standards to preoccupy international standards of solar collector and activation of domestic market / Project Number: 20006342

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