This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Li, D. H. W. Articles by Cheung, K. L. Search for Related Content Social Bookmarking                         What's this?

Evaluation of Simplified Procedure for Indoor Daylight Illuminance Determination against Data in Scale Model Measurements

Building Energy Research Group, Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China, bcdanny{at}cityu.edu.hk

G. H. W. Cheung

Building Energy Research Group, Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China

K. L. Cheung

Building Energy Research Group, Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China

An accurate estimation of the amount of daylight entering a building is the key step in evaluating daylighting designs. The concept of the daylight coefficient (DC), which considers changes in the luminance of the sky elements, offers an effective way of computing indoor daylight illuminances under various sky conditions and solar positions. We currently propose a numerical procedure in the form of nomograph to compute the interior daylight illuminance using the DC concept. This paper presents the work to validate this method via scale model measurements under different actual sky patterns. It was shown that daylight illuminances calculated by the proposed method were in reasonably good agreement with measured results. The findings will hopefully provide building professionals and students with a reliable and simple alternative to current practices that incorporate sky luminance variations to predict the indoor daylight illuminance and assess visual performance under various real sky conditions.

Key Words: Daylight factor • Daylight coefficient • CIE standard skies • Sky luminance • Scale model

Indoor and Built Environment, Vol. 15, No. 3, 213-223 (2006)
DOI: 10.1177/1420326X06066300


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?