1 Historique    2 Administration    3 Missions    4 Activites    5 Organisation    6 Reunions    7 Liaisons internationales    8 Conclusion

Commission internationale de l''éclairage (CIE)

A review of reinforcement learning methodologies for controlling occupant comfort in buildings

https://pure.tue.nl/ws/files/96515375/TWK_180419_Manuscript_PhotometricMeasurementsOfLightingQuality_V2_Final.pdf

Photometric measurements of lighting quality: An overview

This paper presents a theoretical framework for incorporating the non-image-forming effects of light into daylighting design in the built environment. The framework includes human performance indicators to measure the magnitude of the non-image-forming effects of light as well as light factors to quantify these effects. In addition, architectural (daylighting) design parameters are included to control the magnitude of the light factors reaching indoor environment. To assess the magnitude of the non-image-forming effects of light in daylighting design process, threshold values for every light factor are discussed. A distinction is made between luminous and temporal characteristics of every light factor and the application of their thresholds in daylighting design process. The proposed framework enables stakeholders in the field of daylighting to incorporate the non-image-forming light requirements in design and to evaluate the potential of indoor spaces with regard to these requirements.

Implementing non-image-forming effects of light in the built environment

Transmitted external daylight through semitransparent type building integrated photovoltaic (BIPV) windows can alter the visible daylight spectrum and render different colors, which can have an imp...

https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.9b05591

Color Comfort Evaluation of Dye-Sensitized Solar Cell (DSSC) Based Building-Integrated Photovoltaic (BIPV) Glazing after 2 Years of Ambient Exposure

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, Ra,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.

/pdf/effect-of-window-glazing-on-colour-quality-of-transmitted-2bain8nuos.pdf

Effect of window glazing on colour quality of transmitted daylight

Various applications in building lighting such as automated daylight systems, dynamic lighting control systems, lighting simulations, and glare analyzes can be optimized using information on the actual luminance distributions of the surroundings. Currently, commercially available luminance distribution measurement devices are often not suitable for these kind of applications or simply too expensive for broad application. This paper describes the development of a practical and autonomous luminance distribution measurement device based on a credit card-sized single-board computer and a camera system. The luminance distribution was determined by capturing High Dynamic Range images and translating the RGB information to the CIE XYZ color space. The High Dynamic Range technology was essential to accurately capture the data needed to calculate the luminance distribution because it allows to capture luminance ranges occurring in real scenarios. The measurement results were represented in accordance with established methods in the field of daylighting. Measurements showed that the accuracy of the luminance distribution measurement device ranged from 5% to 20% (worst case) which was deemed acceptable for practical measurements and broad applications in the building realm.

/pdf/a-practical-device-for-measuring-the-luminance-distribution-2tnfnbvcne.pdf

A practical device for measuring the luminance distribution

The bee-eye: a practical device for measuring the luminance distribution

https://pure.tue.nl/ws/files/146417069/1_s2.0_S0360132320300573_main.pdf

T.W. Kruisselbrink

Papers

Photometric measurements of lighting quality: An overview

Effect of window glazing on colour quality of transmitted daylight

A practical device for measuring the luminance distribution

The bee-eye: a practical device for measuring the luminance distribution

Feasibility of ceiling-based luminance distribution measurements