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Performance Testing of Light Pipes in Real Weather Conditions for a Confrontation with Hemera

2016; Volume: 5; Issue: 1 Linguagem: Inglês

10.18178/jocet.2017.5.1.347

1793-821X

Bruno Malet-Damour, Harry Boyer, S. Guichard, Frédéric Miranville,

Water Systems and Optimization

Daylight offers many possibilities.Its proper use is a major asset to develop the design, energy and environmental quality of a building but also improve the physiological and psychological conditions of the user.New emerging devices, offer the opportunity to improve visual comfort while, providing energy savings.The light pipes are considered as a part of these innovative devices.Existing semi-empirical models do not adequately transcribe the behavior of light pipes.The scientific objective of this study is to investigate the propagation of light within a real test-cell equipped with this device in real weather conditions.The aim is to better understand the role of each parameter (solar geometry, diffuse illumination, direct illumination, etc.).The results indicated a difference in light distribution within the test cell between the clear and overcast sky.We target new parameters to take into account in modeling the phenomenon.