Comparative Study of Daylighting Calculation Methods

Abstract

Abstract. The aim of this study is to assess five daylighting calculation method commonly used in architectural study. The methods used include hand calculation methods ( SNI/DPMB method and BRE Daylighting Protractors), scale models studied in an artificial sky simulator and computer programs using Dialux and Velux lighting software. The test room is conditioned by the uniform sky conditions, simple room geometry with variations of the room reflectance (black, grey, and white color). The analyses compared the result (including daylight factor, illumination, and coefficient of uniformity value) and examines the similarity and contrast the result different. The color variations trial is used to analyses the internally reflection factor contribution to the result.

Experimental Study of Window Shading Effect on Building Thermal-Visual Comfort in a Tropical Region

“…This illuminance value significantly decreases if the sky is cloudy (overcast sky). At this time, the value may reach 10,000 lux [44,45]. Meanwhile, at night, the illuminance level drops drastically to less than 3 lux [46,47].…”

The effectiveness of dayligting through the toplighting design in large-volume building models

“…Although the skylight component is the largest determinant of the DF value, the reflection also contributes to the illumination (Acosta et al 2015). A space painted white (reflection level 70%) can increase the Daylight Factor value up to 3 times compared to the one with black paint (Mandala and Ritva Santoso 2018).…”