Evaluating Thermal and Lighting Energy Performance of Shading Devices on Kinetic Façades

Lee, Dong‐Seok; Koo, Sung-Han; Seong, Yoon-Bok; Jo, Jae-Hun

doi:10.3390/su8090883

Cited by 27 publications

(9 citation statements)

References 18 publications

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“…The results of the research allow us to confirm that it is possible to define the factors controlling the movement mechanism and features related to morphological design of the façade, the type of plant implemented, and the material selection, which are used as parameters that should be taken into account during the preliminary design phase of the kinetic green façade. The obstruction index, light transmittance, and exposure coefficient of the shading devices are the features related to thermal, lighting, and energy performance of kinetic façade shading devices [37]. These features are dependent on the morphological design of the system and material type.…”

Section: Discussionmentioning

confidence: 99%

Sustainability-Related Parameters and Decision Support Tools for Kinetic Green Façades

2021

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Constant challenges, environmental threats, and rapid changes of living conditions on the earth make it necessary to seriously take up the topic of resilience and sustainability. The interdisciplinary and holistic approach is more important than ever before, and engineering science is required to adapt to global conditions. This article presents the results of research aimed at the identification of sustainability-related parameters for kinetic green façades in the preliminary design phase and evaluation of current decision support tools. The authors carried out the comparative analysis of existing decision support methods and tools for sustainable development, used in fields and disciplines such as architectural design, environmental engineering, and structural design. The particular focus of the research was on the preliminary concept design of kinetic green façades. Specific methods such as forecasting and backcasting linked to post-occupancy evaluation tools were also taken into account. Parametric modeling based on optimization algorithms was recognized as the most adequate method. As a result of the conducted research, the steps to be taken at the early design stage for sustainable façade design were identified based on the example of the innovative system of kinetic green façade. The first step is to determine the design criteria of the façade considering the factors related to climate, culture, environment, and special design requirements. In the next step, the design parameters of the façade system are defined depending on the aforementioned criteria. In the third step, system design and modeling are done. Finally, the performance of the façade system is evaluated. If the desired performance is not achieved, the designer returns to the 2nd and 3rd steps. These last three steps of the preliminary design stage of sustainable façade systems are critical since they allow us for the façade design optimization, which in turn has a significant influence on the whole building performance and sustainability parameters.

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Section: Discussionmentioning

confidence: 99%

Sustainability-Related Parameters and Decision Support Tools for Kinetic Green Façades

2021

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“…He identified that the radiation value at which most users operated the blinds was 233 W/m 2 . Lee et al [46] suggested a value of 200 W/m 2 in a study about the evaluation of thermal and lighting energy performance of shading devices on kinetic facades for the climate of Dubai (UAE). Wankanapon [47] found a value of 189 W/m 2 for a white roller shade allowing to save cooling energy from 21 to 27% for the climate of Minneapolis (USA).…”

Section: Sub-variantsmentioning

confidence: 99%

Summertime Overheating Risk Assessment of a Flexible Plug-In Modular Unit in Luxembourg

2020

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Modular buildings offer faster construction process, provide better construction quality, allow reducing construction waste and are potentially flexible. Frames of modular units can be made of metal, timber, concrete or mixed materials but lightweight structures do not always allow erecting high-rise buildings and generally present a higher risk of overheating and/or overcooling. To reconcile these pros and cons, a typology of modular building called Slab was designed by a group of architects. The building is composed on the one hand of a permanent concrete structure named shelf-structure and on the other hand of several flexible removable timber modular units, also known as modules. The shelf-structure will host the common utility rooms and will serve as docking infrastructure for the housing modules. To provide high flexibility, the Slab building was designed to adapt to any orientation and location in Luxembourg. An energy concept and a HVAC systems design has been developed for the Slab building. Furthermore, a two-fold sustainability analysis was carried out. The first part of the analysis regards the determination of the minimum required wall thicknesses of the modules in accordance with Luxembourgish regulatory requirements, although the current regulation does not yet consider the Slab building typology. The second part, which is the subject of this paper, is thermal comfort assessment, more precisely, summertime overheating risk assessment of these modules, in compliance with Luxembourgish standard. In this regard, dynamic thermal simulations have been realized on two module variants; the first fulfills the passive house requirements, and the second—the current requirements for building permit application, which in principle corresponds to low energy house requirements. Simulations showed that with adequate solar shading and reinforced natural ventilation by window opening, overheating risk could be avoided for the normal residential use scenario for both module variants.

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“…Em se tratando de sistemas de proteção solar, destacam-se alguns trabalhos com abordagens capazes de considerar os critérios térmicos e luminosos simultaneamente, como Lima, Bittencourt e Caram (2013) e Manzan (2014), que estudam a relação da geometria dos dispositivos de controle solar no desempenho do ambiente interno, e Lee et al (2016) e Carletti et al (2016), que avaliam a performance termoluminosa de sistemas de proteção solar automatizados. De modo geral, esses trabalhos evidenciam a complexidade de conciliar os aspectos térmicos e luminosos no desenvolvimento de sistemas de proteção solar.…”

Section: Introductionunclassified

Avaliação de dispositivos de sombreamento no RTQ-R do ponto de vista térmico e luminoso

Souza

Soares²,

Alves

2018

Ambient. constr.

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Resumo Considera-se que o Regulamento Brasileiro de Eficiência Energética em Edificações Residenciais (RTQ-R, 2012) apresenta um sistema de pontuação que desvaloriza o uso de dispositivos de sombreamento para as aberturas que não venezianas. Esses dispositivos são considerados com peso máximo de 50% em relação à pontuação das venezianas ainda que apresentem desempenho superior a esse peso. O presente estudo investigou o desempenho térmico e luminoso de diferentes tipologias de proteção solar em aberturas a fim de propor uma adequação do sistema de pontuações desses dispositivos pelo RTQ-R. Para tanto, foram feitas simulações computacionais com aberturas para quatro orientações em sete zonas bioclimáticas brasileiras e com variações nas tipologias e do acionamento dos dispositivos de proteção solar para ambientes de dormitório e de estar. A partir das simulações computacionais realizadas foi proposta uma escala única de pontuação para os dispositivos de sombreamento. Os resultados das pontuações indicam valores significativamente superiores ao máximo atribuído às venezianas pelo RTQ-R, o que mostra uma distorção entre os valores resultantes das simulações e os valores praticados pelo RTQ-R. Observou-se que as pontuações variam significativamente tanto entre as zonas bioclimáticas quanto com a orientação solar, e, por isso, o estudo propõe um critério de pontuação que considere essas variáveis.

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Evaluating Thermal and Lighting Energy Performance of Shading Devices on Kinetic Façades

Cited by 27 publications

References 18 publications

Sustainability-Related Parameters and Decision Support Tools for Kinetic Green Façades

Sustainability-Related Parameters and Decision Support Tools for Kinetic Green Façades

Summertime Overheating Risk Assessment of a Flexible Plug-In Modular Unit in Luxembourg

Avaliação de dispositivos de sombreamento no RTQ-R do ponto de vista térmico e luminoso

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