Assessment of melanopsin-based quantities: Comparison of selected design tools and validation against on-field measurements

Bellia, Laura; Błaszczak, U. J.; Diglio, Francesca; Fragliasso, Francesca

doi:10.1016/j.buildenv.2023.110037

Cited by 8 publications

(4 citation statements)

References 58 publications

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“…Based on the CIE standard S026/E:2018 [45], the units of EML were converted to mel-EDI with units in lux. Mel-EDI is a scalar multiplier of melanopic lux (EML), and mel-EDI can be easily obtained by multiplying by 0.9058 the value of the melanopic illuminance calculated according to the method proposed by Lucas et al [42,46,47]. As a consequence, the units reported in this study will be the mel-EDI.…”

Section: Methodsmentioning

confidence: 99%

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Electrochromic Glazing and Evaluation of Visual and Non-Visual Effects of Daylight: Simulation Studies for Brasilia – Brazil

Costa,

Amorim,

Silva

2024

Journal of Daylighting

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The employment of electrochromic glazing can be a solution to balance circadian lighting and avoid glare. This can be achieved by controlling daylight entering the room and may be useful within the context of highly glazed facades in buildings in hot climates. Nevertheless, the use of this technology is rarely discussed in this context. In this regard, the aim of this study is to investigate the electrochromic glazing for the lighting conditions, including visual and non-visual effects within the luminous context of Brasilia, Brazil. The method consisted of computer simulations of a representative highly glazed non-residential room with the comparison of electrochromic glazing and conventional clear glass. Climate Studio was used to evaluate the visual effects of light for the entire year, and ALFA for the evaluation of melanopic daylight illuminance, vertical illuminance, and melanopic daylight efficacy ratio (mel-DER) in four days, including two solstices and two equinoxes encompassing the beginning of the four seasons. Results for the electrochromic glazing showed a better balance between a minimum threshold of 250 lux of mel-EDI without exceeding 1,500 lux of vertical illuminance in comparison with the clear glass. This was achieved in 33.33% of the hours for the north, against 27.78% of the hours for the east, 29.17% for the west, and 24.72% for the south. For the clear glass, this balance was achieved in only 9.17% of the hours for north, 10.28% for east, 12.22% for west, and 15% for south. Regarding the spectrum, higher results of melanopic daylight efficacy ratio were observed for the clear glass over the four simulated days. The main conclusion was that the electrochromic glazing was capable of providing a better balance between visual and non-visual requirements and can be a suitable solution for highly glazed facades in Brasilia. Nevertheless, particularly for the north orientation, the supply of circadian lighting can be jeopardized when the electrochromic glazing remained at the dark state.

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Section: Methodsmentioning

confidence: 99%

“…Bellia et al [42] studied the accuracy and applicability of the software ALFA. For the purpose of evaluating non-visual effects, two different approaches, based on the use of ALFA and DIALux, were described, validated against on-field measurements, and compared.…”

Section: Methodsmentioning

confidence: 99%

Electrochromic Glazing and Evaluation of Visual and Non-Visual Effects of Daylight: Simulation Studies for Brasilia – Brazil

Costa,

Amorim,

Silva

2024

Journal of Daylighting

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Section: Methodsmentioning

confidence: 99%

“…To show compliance with building codes and design criteria, simulation software has become the primary tool in the fields of environmental sustainability, and lighting design (Azhar and MBC, 2009;Ibarra and Reinhart, 2009). The fundamental reason for utilizing DIALux for lighting simulation and calculations in the study was that it is the primary simulation tool utilized by designers (Bellia et al, 2023), for its fast calculation abilities (Hemmerling et al, 2023), ability to provide a platform to design lighting systems that appeal to users (Guerry et al, 2019), reliable use to test different lighting devices abilities like different lenses used in LED fittings (Kee Xiao Ying and Lim, 2022), and its appeal stems from the fact that it is free, user-friendly, and imports photometric data from about 190 manufacturers ("DIALux", 2023). DIALux can compute the electric light aspects, daylighting, and lighting system power consumptions.…”

Section: Modeling and Simulationmentioning

confidence: 99%

Hybrid lighting approach to improve interior workspace environments: a case study in the UAE

Al Kailani,

Al Dhaheri,

Sheta

2024

FEBE

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PurposeInterior workspace environments use exclusively artificial light, resulting in a loss of biological connection and natural light quality, as well as greater energy consumption. The purpose of the study is to identify a suitable system that can provide natural light to such interior spaces throughout the day while supplementing it with artificial light when necessary. The fundamental aim is to provide insights into the most effective solutions for energy-efficient lighting design in the UAE's environment, with the potential to lower energy consumption related to interior lighting.Design/methodology/approachThe study adopted an empirical approach to gather and analyze primary data based on field measurements to understand and assess existing lighting conditions, as well as DIALux lighting simulation software to test the efficacy of the proposed HLS in terms of natural light delivery, illumination quality and energy consumption. A branch of a local bank in the United Arab Emirates, situated inside one of the shopping malls where there is no natural light penetration, has been chosen as a case study.FindingsThe findings of comparing the base case to four probable scenarios that used HLS revealed that the third scenario, which uses 100% pure sunshine and 35% artificial LED light during daylight operations and 100% LED light during night duty, is considered to be optimal in terms of illumination quality and energy efficiency.Originality/valueThe study demonstrated the potential of innovative lighting to improve the visual working environment in interior spaces with limited access to direct natural lighting, especially in arid regions, where sunlight is plentiful throughout the year. The study contributes new insights into the establishment of lighting-related recommendations and standards for the UAE context. This may include advice for sustainable construction practices, lighting guidelines or incentives to encourage the use of hybrid lighting technology in commercial and institutional buildings.

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Thermal Engineering and Building Energy Systems

Minichiello,

Naso

2024

Springer Aerospace Technology

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Assessment of melanopsin-based quantities: Comparison of selected design tools and validation against on-field measurements

Cited by 8 publications

References 58 publications

Electrochromic Glazing and Evaluation of Visual and Non-Visual Effects of Daylight: Simulation Studies for Brasilia – Brazil

Electrochromic Glazing and Evaluation of Visual and Non-Visual Effects of Daylight: Simulation Studies for Brasilia – Brazil

Hybrid lighting approach to improve interior workspace environments: a case study in the UAE

Thermal Engineering and Building Energy Systems

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