An Evaluation of Annual Luminous Exposure from Daylight in a Museum Room with a Translucent Ceiling

Brzezicki, Marcin

doi:10.3390/buildings11050193

Cited by 4 publications

(5 citation statements)

References 45 publications

(53 reference statements)

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“…First, Radiance 2.0, which was used to evaluate performance in this study, is a popular ray-tracing software that can analyze the transmission, reflection, and diffusion of light. Radiance applies the Backwards Ray-Tracing Technique, which traces light backward from an observer to the light source and has been used to evaluate the performance of shading and lighting systems [32][33][34][35]. This study used version 2.0 of Radiance, which can be used with AutoCAD 2000 to analyze indoor illumination.…”

Section: Performance Evaluation Methodsmentioning

confidence: 99%

Evaluation of External Light Shelf Performance in Relation to the Ceiling Types Used in Indoor Spaces

Jung,

Lee,

Lee

2023

Energies

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A light shelf is a type of natural daylight system that brings natural light from the outside into an indoor space through a reflector and a ceiling surface. The introduction of light shelves has led to studies evaluating their efficiency. However, past studies on light shelves did not consider the diversity of ceiling types when evaluating their performance. Therefore, this study derives fundamental data involving external light shelf designs by evaluating light shelf performance based on the ceiling type present using a light environment simulation method. This study analyzed the indoor illuminance distribution with Radiance to evaluate the performance according to light shelves and indoor space types. The results derived from this study are as follows: (1) In the case of a flat ceiling, the performance of an external light shelf can be improved by increasing its angle and width. However, adjusting the external light shelf angle to 30° during the middle of the season and 20° in winter is ineffective because natural light is not reflected by the ceiling surface. (2) The performance of a light shelf can be improved by increasing the slope and curvature of the ceiling types specified in this study. However, setting the light shelf angle to 30° during the middle season and to 30° and 20° in winter, when external natural light entering the indoor space is not reflected by the ceiling surface, is ineffective due to the low levels of daylight performance, regardless of the type of space. (3) To increase uniformity levels in gable ceilings and curved ceilings, it is advantageous to increase the number of reflections and diffusion areas on the ceiling’s surface due to the uniqueness of these ceiling shapes. Furthermore, the optimal external light shelf angle for these ceiling types differs from that of other types. (4) Regarding the appropriate external light shelf size according to a particular ceiling type, installing an angle-controllable external light shelf with a width of 1.2 m can improve daylight performance.

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Section: Performance Evaluation Methodsmentioning

confidence: 99%

Evaluation of External Light Shelf Performance in Relation to the Ceiling Types Used in Indoor Spaces

Jung,

Lee,

Lee

2023

Energies

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“…Kim et al [9,17] conducted a comparative analysis of the effects of applying different shapes to skylights in existing museums in Korea through a validated daylight simulation based on the software RADIANCE, verifying the effectiveness of applying daylighting simulation at an early stage of architectural design and evaluating the possibility of using skylights in museums. Brzezicki [18] evaluated the annual exposure of a museum exhibition space with translucent clerestory windows and a dropped ceiling using daylight simulations. Huang et al [19,20] studied the light environment of museum paintings, calligraphy halls, and sculpture halls in China.…”

Section: Previous Research and Research Objectivesmentioning

confidence: 99%

“…Tables 3 and 4 present the settings of all simulation and optimization parameters. These values were meticulously chosen, drawing from previous research, to ascertain the robustness of the results that we generated [18,28]. For the openings, transparent and diffusive materials were used as specified in Table 5.…”

Section: Simulation and Optimization Settingsmentioning

confidence: 99%

A Study on Optimal Opening Configuration for Art Museum Exhibition Space Considering Daylight Performance, Indoor Thermal Comfort, and Energy Consumption

Ma,

Inoue,

Fang

et al. 2023

Sustainability

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Skylights are an efficient means of daylighting in exhibition spaces, but their design presents significant challenges. Considering that daylight utilization profoundly impacts both the visual and thermal environments while affecting energy consumption, the early application of multi-objective optimization strategies becomes imperative. However, many optimization studies provide numerical references only, without delving into the characteristics of opening distribution. This study introduces an optimized exploration approach for openings based on grid subdivision and material parameter selection, targeting Useful Daylight Illuminance (UDI), Energy Use Intensity (EUI), and Predicted Percentage of Dissatisfied (PPD). Simulations and optimizations were performed using Honeybee and Octopus, focusing on the optimal configurations of four typical skylights in Fukuoka, Japan’s climate. The results demonstrate that this novel optimization approach improves metrics for each case and challenges traditional perceptions of daylight systems. Flexible and diverse opening configurations, formed through irregular layouts and material combinations, help achieve more ideal holistic environmental effects under different climatic conditions. Thus, we should provide these research findings as design guidelines for similar scenarios.

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“…The idea of using a translucent ceiling to scatter daylight is not new. Previous studies by the author show that "since ancient times, light-permeable fabric has been used to scatter light coming from above in rooms and open spaces" [5]. A velarium-an awning stretching over an ancient theatre-was used to avoid glare and limit direct sunlight illumination reaching spectators [6].…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N

Brzezicki

2021

Buildings

Self Cite

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The present study investigates the issue of computer-aided daylight evaluation in an office room with a light shelf and dropped translucent ceiling. In this type of room, daylight is admitted from two sources: (i) a standard window in the wall and (ii) via a light shelf and clerestory window, which illuminate the plenum located above the working space. The light from the plenum is transmitted through the translucent ceiling into the office room. The present study is based on data obtained through a computer-aided daylight simulation by DeLuminæ (DL-Light, ver. 11.0.9, and DL-Instant, ver. 6.1.4) software using the Radiance engine and real weather data for Wroclaw, Poland, at 51st lat. N. An office room of 12 × 6 m with different shading and daylight distribution scenarios was simulated (Variants 1–5). Next, the useful daylight illuminance (UDI (%)) for the range of 300–3000 lx and daylight glare probability (DGP) were calculated. To further optimize the daylighting scenarios, an adaptive shading system was simulated, which was activated when the illuminance value dropped below 300 lx. In the final variant, Variant 6, mean UDI300–3000 values were recorded to be above 80% for 95% of the area of the work plane. This allows the conclusion that a light shelf and translucent ceiling guide daylight deep into the room, improving uniformity and reducing glare when the standard window is covered by an adaptive shading system.

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An Evaluation of Annual Luminous Exposure from Daylight in a Museum Room with a Translucent Ceiling

Cited by 4 publications

References 45 publications

Evaluation of External Light Shelf Performance in Relation to the Ceiling Types Used in Indoor Spaces

Evaluation of External Light Shelf Performance in Relation to the Ceiling Types Used in Indoor Spaces

A Study on Optimal Opening Configuration for Art Museum Exhibition Space Considering Daylight Performance, Indoor Thermal Comfort, and Energy Consumption

An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N

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