Iluminação natural em edifícios de escritórios: avaliação dinâmica de desempenho para São Paulo

Cavaleri, Mônica Pereira Marcondes; Cunha, Guilherme Reis Muri; Gonçalves, Joana Carla Soares

doi:10.20396/parc.v9i1.8650725

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…This solution of highly glazed façades has been replicated in large cities, such as Sao Paulo, Belo Horizonte, and Brasilia. Studies reported problems related to glare, excess light on working surfaces, and an increase in energy consumption for lighting due to the incidence of direct sunlight inside the working environment [25][26][27][28][29]. Moreover, the use of clear glass was also identified on facades in Brasilia and Sao Paulo in modernist buildings, mostly built between the 1960s and 1970s [24,27,30].…”

Section: Glazed Façades: Brazilian Context Of Non-residential Buildin...mentioning

confidence: 99%

“…7. This model represented a generic office space within the Brazilian context, and its dimensions were based on the studies of Amorim et al [50], Cavaleri, Cunha, and Gonçalves [26], and Sarra and Mühlfart [27]. The walls, floor, and roof were modeled using the command "box," inserting the already described dimensions, with a width of 0.15 m. The surfaces corresponding to the floor, ceiling, and window were modeled using the command "_SrfPt.…”

Section: Simulation Model Parameters and Variablesmentioning

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: Glazed Façades: Brazilian Context Of Non-residential Buildin...mentioning

confidence: 99%

Section: Simulation Model Parameters and Variablesmentioning

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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“…The windowto-wall ratio varied from 40%, the minimum aperture allowed by local laws (Santa Maria, 2018), to 100%, in 10% increments Tinker, 2001). The UDI-autonomous (500-2,500 lx) was adopted with a range between 0 to 500 lx taken as the short range, 500 to 2,500 lx as the desirable range, and illuminance more than 2,500 lx as the oversupply (Asfour, 2020;Marcondes Cavaleri;Gonçalves, 2018;Fernandes;Ruivo;Krebs, 2018;Heschong;Lee, 2009;Qiu;Yang, 2020;Queiroz;Westphal;Pereira, 2020). The DA (500 lx) was based on the Brazilian standard that determines the minimum level considering activities such as medical service; reading and writing; computer-aided design, among others, which are everyday tasks developed in offices (ABNT, 2013).…”

Section: Introductionmentioning

confidence: 99%

Daylight and energy performance of side lighting systems in an office room in a subtropical climate

Gabriel,

Grigoletti,

Meller

et al. 2024

PARC Pesq. em Arquit. e Constr.

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In office buildings, daylight is an important natural resource, as it is profusely available during occupied hours. However, its use can increase energy consumption for air conditioning. Therefore, combining this resource with side lighting systems and promoting its integration with electric lighting is essential to obtain an energy balance. This paper aims to analyze daylight performance and the energy consumption for lighting and air conditioning considering four types of glazing, four orientations, from window-to-wall ratios varying between 40% to 100% for bare and shaded window models in an office room located in a subtropical city in southern Brazil. The methodology was based on Useful Daylight Illuminance levels of 500 to 2,500 lx, Daylight Autonomy levels of 500 lx, and total energy consumption through simulation in DesignBuilder software. The results showed that L13 glazing is not recommended for bare and shaded windows, regardless of window orientation. M76 presented the best performance for energy consumption for West shaded windows. For the West, shading is necessary irrespective of the glazing type (except L13, whose best performance is for bare windows) from WWR 50%. M76 and M52 had the lowest total energy consumption. The findings of this study add to an understanding of the energy savings and lighting performance of different types of glazing, combined with window apertures, and solar orientations for a subtropical climate. Furthermore, the study shows that the choice of glazing depends not only on the presence of shading but also on the orientation and WWR, without a linear behavior.

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“…Calama-González, Suárez e León-Rodriguez (2018) estudaram o uso de dispositivos de proteção solar como forma de redução do consumo com iluminação e ar-condicionado em edificações escolares e observaram uma redução de cerca de 20% no consumo com ar-condicionado e 50% no consumo com iluminação artificial. Percebe-se, a partir de pesquisas realizadas por diversos autores, que o uso correto de protetores solares, a aplicação de propriedades ópticas adequadas em fachadas de edifícios, controles da iluminação artificial, além de outros parâmetros, resultam em melhor desempenho energético da edificação, assim como maior conforto aos usuários (CRUZ E SILVA, 2011;DIDONÉ;PEREIRA, 2010;MELLO, 2019;LAZZARIS;CARVALHO;GALAFASSI, 2019;QUEIROZ;PEREIRA, 2019;MARCONDES CAVALERI;CUNHA;GONÇALVES, 2018;OUAHRAMI;TOUMA et al, 2016).…”

Section: Introductionunclassified

Simulação termoenergética e lumínica de fachadas com brises no clima tropical

Dias

Souza²,

Gomes³

et al. 2023

PARC Pesq. em Arquit. e Constr.

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O uso da luz natural em edificações é uma importante estratégia de projeto pois minimiza o consumo de energia com iluminação elétrica e proporciona maior qualidade visual para seus usuários. Porém, essa estratégia pode resultar em ganhos térmicos excessivos e ofuscamento, causando desconforto térmico em ambientes de trabalho. No intuito de buscar uma combinação entre qualidade visual e bom desempenho termoenergético e lumínico, analisa-se nesse estudo a influência do tipo de brise soleil e tipo de vidro, aplicados a uma edificação comercial com fachada envidraçada, localizada em regiões de clima tropical. Inclui-se na análise a edificação sem o uso do brise soleil, como referência. São realizadas simulações computacionais com os programas Daysim e EnergyPlus considerando-se a fachada oeste da edificação. Ao considerar o parâmetro tipo de vidro, os modelos que apresentam melhor comportamento são aqueles com vidro comum. Comparando-se os resultados entre os tipos de brises percebe-se que os modelos com brise vertical possuem valores mais elevados de taxa de radiação solar do que os modelos com brise horizontal, trazendo benefícios de maior luz natural ao ambiente. Os resultados, considerando-se as horas de conforto do usuário, indicam que o modelo de brise horizontal com vidro laminado na cor verde apresenta-se como o mais adequado, visto que possui o menor consumo de energia e mais horas de conforto. Ressalta-se, como contribuição do presente trabalho, a obtenção de modelos de brises mais adequados para projetos de brises aplicados em fachadas envidraçadas em regiões de clima tropical.

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Iluminação natural em edifícios de escritórios: avaliação dinâmica de desempenho para São Paulo

Cited by 9 publications

References 15 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

Daylight and energy performance of side lighting systems in an office room in a subtropical climate

Simulação termoenergética e lumínica de fachadas com brises no clima tropical

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