Calculation of the Vertical Daylight Factor on Window Façades in a Dense Urban Environment

Autor:	TM Chung, H. D. Cheung
Rok vydání:	2005
Předmět:	Engineering Measure (data warehouse) Daylight factor business.industry Architecture Radiance Window (computing) Daylight business Urban environment Daylighting Simulation Energy (signal processing)
Zdroj:	Architectural Science Review. 48:81-91
ISSN:	1758-9622 0003-8628
DOI:	10.3763/asre.2005.4811
Popis:	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 facades. 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2bac6018ebc2fc3c92fdfacc3cb3933 https://doi.org/10.3763/asre.2005.4811 Zobrazit plný text záznamu