Improving the Performance of Light Pipe System Using Laser Cut Panel

• Published in: Journal of physics. Conference series Vol. 1150; no. 1; pp. 12064 - 12070
• Main Authors: Abd Kadir, Aslila, Hakim Ismail, Lokman, Kasim, Narimah, Abd Wahab, Izudinshah, Kaamin, Masiri, Ngadiman, Norhayati binti, Shafiq Bin Mohd Rosli, Mohd
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.01.2019
• Subjects: Apertures; Buildings; Entrances; Illuminance; Laser beam cutting; Lasers; Light; Light pipes; Pyramids; Scale models
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1150/1/012064

Light pipe systems (LPS) are simple devices that allow the transmission of daylight into interiors of buildings. It is a convenient concept for illumination of windowless parts of buildings. The light performance of this is highly dependent on the solar altitude due to the small inlet aperture. Placing the laser-cut panel (LCP) at the entrance aperture in light pipe system, will increase the light performance during low solar angle. This paper presents the results of light performance a 400mm diameter light pipe integrated with a laser-cut panel at entrance aperture as collector. For that reason, this research adopted an experimental approach to compare the light pipe performance via 1:10 scale model. Two scale models were built. LCP in the form of pyramids was fitted at the entrance aperture of light pipe in different tilted angle 40° and 47.5°. The system has been monitored 30 minutes interval with lux meter to evaluate the improvement light performance on a working plane for 6 days under good sky condition. The results of this experiment shows that LCP with 40° tilted angle performed better than 47.5° tilted angle. The light pipe with LCP as collector the minimum recommended illuminance by Malaysian Standard (MS) 1525:2007 can be achieved as early at 8am.