Performance Evaluation of Lighting and Daylighting Retrofits: Results from IEA SHC Task 50

Dubois, Marie-Claude; Gentile, Niko; Amorim, Cláudia Naves David; Osterhaus, Werner; Stoffer, Sophie; Jakobiak, Roman; Geisler‐Moroder, David; Matusiak, Barbara; Onarheim, Fredrik Martens; Tetri, Eino

doi:10.1016/j.egypro.2016.06.259

Cited by 23 publications

(14 citation statements)

References 2 publications

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“…Artificial lighting dimming controls [33,[65][66][67][68][69] Control logics are usually too simplistic to guarantee both visual comfort conditions and energy savings due to reduced artificial lights use…”

Section: Control Systemsmentioning

confidence: 99%

A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

2017

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Abstract:The study of daylight conditions within educational buildings has been a topic of interest since the nineteenth century in western countries, and European ones in particular. Although it has been argued that providing a view outside-or even using daylight instead of more stable and manageable artificial light-could reduce students' performance without providing a pleasant and healthy environment, nowadays it seems that a large consensus upon the need to design well daylit spaces is being reached. This paper reviews how the research community has tackled the task of understanding and solving the complex relationships amongst local climate, users' needs and design constraints in school buildings by showing the different approaches used and technological solutions suggested. The reported case studies, based either on experimental measurements or on simulations, highlight the need of a comprehensive approach to the topic to fully understand the non-trivial requirements of a daylit educational environment.

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Section: Control Systemsmentioning

confidence: 99%

A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

2017

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“…Then the annual DGP was examined. Figure (7) compares the results for glare at the beginning of the summer (21/6) and winter (21/12). The DGP results for the "Base Case" ranged between 24% and 27% during the summer solstice and between 22% and 23% during the winter solstice.…”

Section: Glare Resultsmentioning

confidence: 99%

“…As a result of the above review, it is clear that several techniques can be used to enhance the daylight performance in hot arid climate and limit glare but the research shall focus on the use of louvers as solar screens to control daylighting and the associated glare. Louvers when compared to other techniques have the advantage of being easily retrofitted and installed [7]. Two different locations for the louvers, interior and exterior, were proposed to enhance the daylighting performance of the toplighting technique used in the drawing hall.…”

Section: Regarding the Daylighting Simulation Programs Used In Previous Researches The Following Can Be Deduced From The Previously Examimentioning

confidence: 99%

Enhancing the Performance of Daylighting in Toplit Drawing Halls Using Diva-for-Rhino as One of the Simulation Programs: “A Case Study of Drawing Halls in Cairo, Egypt as a Hot Arid Climate”

Nessim

2017

JES. Journal of Engineering Sciences

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Several studies showed the clear relationship between the human performance inside buildings and the presence of appropriate daylight. As well known, daylighting promotes health and vitality which had been scientifically proven to improve the academic performance of students in educational buildings due to long hours spent within such spaces during the daytime. In addition to reducing or eliminating electric lighting during daytime, daylighting helps in creating a visual stimulating and productive environment for occupants.This paper aims at enhancing daylighting performance in case of existing toplit educational spaces. Daylighting simulations were conducted on a north-east oriented toplit drawing hall, located in the city of Cairo, Egypt. A plug-in used to interface Radiance and Daysim, namely Diva-for-Rhino, was used to calculate and analyze the daylight performance within the drawing hall. Divafor-Rhino is considered a highly optimized daylighting plug-in for the Rhinoceros and allows users to carry out a series of environmental performance evaluations. Several techniques were examined to enhance the daylight performance but the research focuses on the use of louvers as solar screens to control daylighting and the associated glare. Louvers when compared to other techniques have the advantage of being easily retrofitted and installed. Two different positions for the louvers were proposed and simulations were carried-out.Results showed that the Daylight Availability (DA) could be significantly enhanced using additional and retrofitted techniques by reducing the "Overlit" zone from 100% to almost 50% and keeping the ASE within the favorable limit (less than 10%).

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“…It has been proven that buildings with good daylighting have positive effects on the well-being and health of occupants, reducing stress levels, and improving mood and photobiological effects [1][2][3][4][5]. The International Energy Agency (IEA) promoted the use of daylight as a means of reducing electricity consumption on lighting [6], and increasing the energy efficiency of buildings [7,8]. International Net Appl.…”

Section: Introductionmentioning

confidence: 99%

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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Performance Evaluation of Lighting and Daylighting Retrofits: Results from IEA SHC Task 50

Cited by 23 publications

References 2 publications

A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

Enhancing the Performance of Daylighting in Toplit Drawing Halls Using Diva-for-Rhino as One of the Simulation Programs: “A Case Study of Drawing Halls in Cairo, Egypt as a Hot Arid Climate”

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

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