Estimation of irregular obstructed vertical sky components under various CIE skies

Chen, Wenqiang; Li, Danny H W; Lou, Siwei

doi:10.1016/j.egypro.2019.01.094

Cited by 9 publications

(6 citation statements)

References 9 publications

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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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Section: F Sky Surrounding the Buildingsmentioning

confidence: 99%

A Review: Buildings Energy Savings - Lighting Systems Performance

et al. 2020

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“…As L dv data were not available at the experimental facility described in the Section 2, these data will be obtained, considering the similar characteristics of both solar irradiance and illuminance. The models developed for solar irradiance prediction on a vertical surface can, therefore, also be employed for daylight calculations [12]. The illuminance incident on a vertical surface, L gv , was evaluated as the sum of beam, L bv , sky-diffuse, L dv , and ground-reflected, L rv , components.…”

Section: Determination Of Vscmentioning

confidence: 99%

“…irradiance prediction on a vertical surface can, therefore, also be employed for daylight calculations [12]. The illuminance incident on a vertical surface, L gv , was evaluated as the sum of beam, L bv , skydiffuse, L dv , and ground-reflected, L rv , components.…”

Section: Determination Of Vscmentioning

confidence: 99%

“…Illuminance on vertically oriented surfaces is, therefore, important for modeling the daylight availability, especially for high-rise buildings with substantial areas of glazed surfaces [11]. Solar radiation data on vertical surfaces can also be used to evaluate the performance of Building Integrated Photovoltaics (BIPV), because the vertical facades of modern cities occupy larger areas than roof surfaces and usually present better maintenance conditions for photovoltaic panels [12]. However, the basic outdoor solar irradiance and illuminance data for the surfaces of interest are not usually available in many parts of the world [13].…”

Section: Introductionmentioning

confidence: 99%

“…Different alternatives to the use of sky scanners have been proposed for classifying the skies [32] including the use of different climatic parameters [33][34][35][36], vertical [12,20] and horizontal illuminance [37,38], and satellite data [39]. VSC has been proposed as an appropriate method, both for categorizing the CIE Standard General Skies and for determining daylight illuminance on inclined surfaces with various orientations [17,32].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Vertical Sky Component without Obstructions for Daylighting in Burgos, Spain

et al. 2020

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Daylight availability knowledge is the first step for an energetic and visually efficient building and city design. It can be estimated with the Vertical Sky Component (VSC), which is defined as the ratio of the vertical diffuse illuminance over the unobstructed horizontal diffuse illuminance, simultaneously measured at the same point. These illuminance magnitudes are obtained from luxmeter measurements but these data are scarce. Alternatively, VSC can be obtained from prior knowledge of the sky illuminance distribution, which can be measured with a sky scanner device or by reference to the CIE (Commission Internationale de L’Éclairage) Standard classification for homogeneous skies. Both approaches are compared in this study. The coherence of the results obtained for the four cardinal orientations are analyzed by applying classical statistical parameters and luxmeter measurements as references for the results. The measurement campaign was completed between September 2016 and January 2019 in Burgos (Spain), as representative case study and specific contribution of this work. It was observed that the VSC values were higher than 100 in many cases: 21.94% for the south- and 33.6% for the east-facing vertical surfaces. The study highlights the good daylighting conditions in Burgos, mainly due to the predominance of clear skies over much of the year. This fact implies high daylight availability that, with efficient city planning and building design, could potentially lead reduction energy consumption of buildings, improvements in visual comfort, and the well-being of occupants.

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Comparative analysis of visual-thermal perceptions and emotional responses in outdoor open spaces: Impacts of look-up vs. look-forward viewing perspectives

Wang,

Wang

et al. 2024

Int J Biometeorol

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Estimation of irregular obstructed vertical sky components under various CIE skies

Cited by 9 publications

References 9 publications

A Review: Buildings Energy Savings - Lighting Systems Performance

A Review: Buildings Energy Savings - Lighting Systems Performance

Evaluation of the Vertical Sky Component without Obstructions for Daylighting in Burgos, Spain

Comparative analysis of visual-thermal perceptions and emotional responses in outdoor open spaces: Impacts of look-up vs. look-forward viewing perspectives

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