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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

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).

Keywords

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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