The Influence of Selected Type of Daylight Device on Horizontal and Vertical Internal Illuminance

Abstract:

Daylighting is one of the key parameters of internal environment generation in buildings. This parameter determines creation of suitable conditions for visual activities in internal spaces and contributes to human well-being and comfort. Daylight is also the primary stimulus for synchronizing the human circadian photobiological system. Traditional parameters and criterions based explicitly on photopic vision have been critically re-evaluated and basic principles of circadian photometry have been developed in theoretical level. Nevertheless daylighting has often been neglected or left out from the main design proposals, which are usually just focused on covering basic needs for vision tasks represented barely by the illumination limits on working plane. Because the amount of light entering the eye is the most important for circadian entrainment, the illuminance recorded on a vertical plane, at eye level, is more significant for human biological system. This paper deals with the comparison of internal horizontal and vertical illuminance recorded in 3 models of room, inserted in simulation program Radiance and illuminated by three types of lighting devices, i.e. window, light-pipes and permanent supplementary artificial lighting represented by the combination of window and light-pipes. Achieved data also express the influence of a workplace position on the amount of illuminance entering the eye according to the direction of the incoming daylight from windows in side-lit room.

• Periodical: Applied Mechanics and Materials (Volume 824)
• Pages: 707-714
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.824.707
• Online since: January 2016
• Authors: Lucia Maňková*, Peter Hanuliak, Peter Hartman
• Keywords: Circadian Light, Daylight, Light-Pipes, Vertical Illuminance

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