A Daylight Factor for Clear Sky Conditions

This paper describes a method for estimating the daylight factor under clear sky conditions. The internal illuminance is divided into two components; light received directly form the window, as a diffuse source, and light reflected from the internal surfaces of the room. The method intended to estim...

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Bibliographic Details
Published in:Architectural science review 1999-12, Vol.42 (4), p.293-296
Main Author: Alshaibani, Khalid
Format: Article
Language:English
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Summary:This paper describes a method for estimating the daylight factor under clear sky conditions. The internal illuminance is divided into two components; light received directly form the window, as a diffuse source, and light reflected from the internal surfaces of the room. The method intended to estimate the internal illuminance as a relative value from the vertical illuminance on the external surface of the vertical window plane. A comparison against computer simulation is used to validate the proposed method. The purpose of this method is to provide a simple technique that can be used at the early design stages, which can give a preliminary information about daylight performance inside a room.
ISSN:0003-8628
1758-9622
DOI:10.1080/00038628.1999.9697431