Effect of Window Glazing on Colour Quality of Transmitted Daylight

Abstract

In this study, the colour quality of the daylight transmitted through different window glazing types is evaluated. The analysis considered four different types of window glazing: laminated, monolithic, coated and applied film glazing ranging in luminous transmittance from around 0.97 to <0.1. The spectral transmittance data of different window glazing types are taken from the International Glazing Data Base (IGDB), which is maintained by Lawrence Berkeley National Laboratories (LBNL). The study showed that the CIE CRI does not always seem to be the suitable method to predict the colour quality of daylight in building for particular situations. However, in the context of this study, the prediction of colour rendering properties of window glazing by other metrics such as Colour Quality Scale (version 9), Memory CRI, R a,D65 (adjusted CRI metric with D65 as the reference illuminant) performed better. For most of the daylit situations inside the building, the chromaticity difference criterion was not met. Judging the colour quality of such situations requires different method.

Quantitative Investigation Through Climate-based Daylight Metrics of Visual Comfort Due to Colorful Glass and Orosi Windows in Iranian Architecture

“…Moreover, Giovannini et al [17] calculated climate-based daylight metrics (CBDM) for shape variable Mashrabiya as an adaptive shading and daylighting system. Dangol et al [18] investigated several window glazing types for improving visual comfort and avoid daylight glare. Specifically, the Color Quality Scale and Memory CRI have been applied for measuring quality of transmitted daylight.…”

“…Grid of sensors in scale of 0.5 No shading/ no artificial light As Bryman [18] mentioned "using qualitative data to generate hypotheses and using quantitative research to test them within a single project for confirming." Accordingly, several researches, which have field survey for traditional case studies, are reviewed to discover proper colors by means of comparative assessments.…”

Impact of Furniture Layout on Indoor Daylighting Performance in Existing Residential Buildings in Malaysia

“…Zain-Ahmed, Sopian [12] indicates that minimum 10% energy could be saved through implementing daylighting strategies in buildings under tropical skies. Recent studies investigated passive design parameters that can influence daylight distribution in a building, such as the colour of the external façade [23], window-to-wall ratio [24], window glazing [25], external obstructions [26], window orientation [27], atrium [28,29], self-shading strategy [30], automated solar shading [31,32], light pipe [33,34], etc. These strategies should be implemented in buildings at the preliminary stages of design.…”

A color graphic informing on the impact of electric lighting and coated glazing in complex architectural scenes

“…The need to reduce energy consumption in buildings has, among other things, encouraged the development of smart glazing and LED lighting. Regrettably, both can affect the color appearance of indoor spaces …”

“…Regrettably, both can affect the color appearance of indoor spaces. [1][2][3][4] In lighting practice, and for about six decades, the color rendering properties of electric light sources have been evaluated through the calculation of the CIE General Color Rendering Index Ra (CRI Ra). 5 This index assesses the ability of a light source to render color faithfully.…”