Defining the minimum density of a sky luminance grid based on scale model measurements without the sun

Kobav, Matej Bernard; Dumortier, Dominique; Bizjak, Grega

doi:10.1016/j.buildenv.2019.106562

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…Furthermore, the density of the sky grid has very small influence on indoor illuminance calculations if the sun is not taken into account. 26 In order to reduce the workload of sky luminance distribution evaluation，the sky vault was divided into four regions 13 : (a) the zenith region: the altitude of the sky elements is higher than 60° above the horizon; (b) the south region: the region in the direction of the sun (azimuth <45° and altitude <60°); (c) the north region: the region opposite to the sun region (azimuth >135° and altitude <60°) and (d) the east–west region: the region on both sides of the sun (45° < azimuth <135° and altitude <60°) (Figure 6). The data of the sky elements at 6° were excluded.…”

Section: Methodsmentioning

confidence: 99%

Sky luminance distribution model based on the information method and ant colony system

Zhang

Quan³

et al. 2022

Lighting Research & Technology

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This study presents a novel model to estimate the sky luminance distribution (SLD) using the information method based on the research results of the SLD and atmospheric optics theory. The ant colony system of complex optimisation heuristic algorithms is used to analyse and optimise the influencing factors of sky luminance. The SLD using the information method is universal and is not related to geographical, latitudinal or climatic conditions. First, a simple and clear sky classification method is proposed. Then, a model framework is constructed. Using the ant colony system, the effects of the sky luminance elements are analysed and optimised, and numerical expressions for the coefficients of the relative luminance distribution are obtained. Finally, the proposed model is compared with other sky models (Perez’s model, the Commission Internationale de l’Eclairage model and Igawa’s all-sky model). The results show that the proposed model offers significant advantages for generating a universal SLD. Moreover, the information method SLD model can significantly enrich the coverage of the reference sky, and it avoids the shortcomings of existing sky models.

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Section: Methodsmentioning

confidence: 99%

Sky luminance distribution model based on the information method and ant colony system

Zhang

Quan³

et al. 2022

Lighting Research & Technology

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“…It has mentioned that when the sky surrounding has a cloudy view, the energy use is getting higher. Another study reviewed in [63] has stated that the sky view surrounding the buildings, with the help of other factors, can significantly help enhance the daylight design and achieve a better energy efficiency rate in related buildings [64].…”

Section: F Sky Surrounding the Buildingsmentioning

confidence: 99%

A Review: Buildings Energy Savings - Lighting Systems Performance

et al. 2020

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Lighting systems are one of the highest energy consumptions specifically in buildings. Thus, by designing energy efficient systems, it would contribute much to buildings energy savings. Therefore, this paper motivation is to review a number of lighting systems designs applied to many types of buildings. It is then so important to discover what methods and systems which have been proposed to save energy in buildings in term of lighting. By finding out what proposed systems are for different types of buildings, designers and respective researchers e.g., buildings engineers would find possibility and applicability of such lighting systems for certain types of buildings to achieve higher energy savings than some other systems when applied to the same types of buildings. Such a relation between reviewed lighting systems with types of buildings would be helpful for many researchers from different fields. There exist numerous factors that play an important role in achieving higher energy savings rate on which efficient energy lighting systems rely. This paper aims to review several types of lighting systems designs applied to different types of buildings. Additionally, performance(s) of lighting systems might vary depending on the design of the lighting system to achieve higher buildings' energy savings. In this review paper, several past studies that utilized Information and Communication Technology (ICT) from the perspective of energy Informatics for a smart lighting system that efficiently achieves energy savings have been considered. This paper has considered different types of lighting systems and types of buildings. Cited papers in this review paper are derived from six digital libraries which are: IEEE Xplore Digital Library, ScienceDirect, MDPI, Emerald Insight, ACM DL, and Taylor & Francis Online. INDEX TERMS Lighting systems, buildings energy savings, daylight systems, occupancy-based lighting systems, large scale buildings, sky view factor, rural buildings, ICT for energy informatics.

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Optimizing the beam and sky diffuse radiation calculations under random obstructions of urban environments

Lou

Huang

et al. 2021

Building and Environment

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Defining the minimum density of a sky luminance grid based on scale model measurements without the sun

Cited by 6 publications

References 9 publications

Sky luminance distribution model based on the information method and ant colony system

Sky luminance distribution model based on the information method and ant colony system

A Review: Buildings Energy Savings - Lighting Systems Performance

Optimizing the beam and sky diffuse radiation calculations under random obstructions of urban environments

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