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Title: Calculation of the vertical daylight factor on window façades in a dense urban environment
Authors: Cheung, HD
Chung, TM
Keywords: Daylight factor
Urban environment
Window facades
Issue Date: 2005
Publisher: Taylor & Francis
Source: Architectural science review, 2005, v. 48, no. 1, p. 81-92 How to cite?
Journal: Architectural science review 
Abstract: Daylighting supports human activities with energy savings and provides positive effects to human health. In a dense urban environment, ensuring adequate daylight incident on windows is of the utmost importance in the design of building form and layout. Vertical daylight factor (VDF) (defined and explained in the text) has been used as a measure of the daylight availability on window façades. However, there is a lack of comprehensive method for the calculation of VDF. This paper presents a method of VDF calculation based on first principles. The method is also demonstrated for four building layouts with a CIE overcast sky. Results obtained by the presented method are compared with a validated lighting simulation program RADIANCE. A simplified method is also presented at the end of this paper for easy and fast estimation of VDF.
ISSN: 0003-8628
EISSN: 1758-9622
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