Biomimetic building skins: An adaptive approach

Al-Obaidi, Karam M.; Ismail, Muhammad Azzam; Hussein, Hazreena; Rahman, Abdul

doi:10.1016/j.rser.2017.05.028

Cited by 98 publications

(70 citation statements)

References 126 publications

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“…To conclude, the BPRs responsive shading system represents an architectural component able to improve on the one hand aspects such as the aesthetic and cultural values of the space on the building terrace, on the other hand its performance as a trade-off between daylighting conditions inside the indoor space, climatic zone and user requirements. Finally, the system described in this study is well aligned with the research line called 'biomimetic building skin', which is based on the integration of biology in architecture [41]. An example of such a research line is the system described by Dewidar et al [42]: they presented a theoretical model for an adaptive wall system that can mimic nature called the Self-Active Bioclimatic Strategy (SABS).…”

Section: Needs and Requirements Of Algae Pbr As Shading System For Thmentioning

confidence: 85%

Photobioreactors as a Dynamic Shading System Conceived for an Outdoor Workspace of the State Library of Queensland in Brisbane: Study of Daylighting Performances

Verso¹,

Javadi²,

Pagliolico³

et al. 2019

Journal of Daylighting

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In the field of responsive shading systems, the use of photobioreactors (PBRs) containing microalgae seems to be a promising technology. Within this framework, this paper presents a case study where a PBR was specifically conceived as a shading system for an external workspace located on an open terrace of the State Library of Queensland (SLQ) in Brisbane. The proposed shading system makes use of PBRs as translucent screening elements, capable of regulating natural light to provide adequate visual comfort for a multipurpose workspace, despite exposure of the site to direct sunlight and fluctuating weather conditions. The microalgae (Scenedesmus Obliquus) cultivated within the shading elements contribute to improving the environment by bio-sequestrating CO2 and producing oxygen. They are also a valuable raw material containing bioactive compounds with various applications including nutraceutical products, livestock feed, and biofuel synthesis. In addition, their green pigmentation is visually engaging and allows for the filtration of solar radiation. The paper focuses on analyzing the daylight performance in the outdoor workplace under the PBR shade. The biomass density of the PBR is adjustable across a wide range of light transmittances (10%-80%) to counter the highly variable outdoor conditions. For different Tv values, illuminance values were calculated using the simulation tool DIVA-for-Rhino and then analyzed as both point-in-time illuminance in June, September and December, and through climate-based daylight metrics such as the Daylight Autonomy and the Useful Daylight Illuminance. As a further step, the daylighting performances were compared to two other climates (Turin, Italy, and Dubai, United Arab Emirates), to verify which setting of the PBR may be suitable for different boundary conditions, thus making the system more widely applicable. The results in Brisbane showed that for clear sky conditions, higher levels of biomass saturation are needed (Tv < 20%) to remain in the 300-3000 lx 'optimal' illuminance comfort range, with lower concentrations (Tv < 30%) to remain within the 300-6000 lx 'acceptable' illuminance comfort range. Differently, in overcast sky conditions, the optimal range of illuminance is easily obtained with reduced levels of biomass saturation (Tv < 80%).

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Section: Needs and Requirements Of Algae Pbr As Shading System For Thmentioning

confidence: 85%

Photobioreactors as a Dynamic Shading System Conceived for an Outdoor Workspace of the State Library of Queensland in Brisbane: Study of Daylighting Performances

Verso¹,

Javadi²,

Pagliolico³

et al. 2019

Journal of Daylighting

View full text Add to dashboard Cite

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“…3). The motivation for investigating the effect of dimpled surface in architectural scale is the research of wind drag force reduction in the automotive industry [12], the sharkskin contributing to the water drag force reduction in biology [3], and suggestions of implementing this effect on building skins in architecture [13].…”

Section: Application On Building Façadementioning

confidence: 99%

“…In the past decades, the topic of the nature-adaptive built environment has been actively discussed among architects [1][2][3][4]. This intriguing architectural approach blurs the boundaries between architecture and nature.…”

Section: Introductionmentioning

confidence: 99%

“…This intriguing architectural approach blurs the boundaries between architecture and nature. The examples of adaptive systems found in nature inspire the geometries, as well as the material properties for designing the architectural passive (without the computer control) adaptive systems [3,5,6]. Adaptive architecture, instead of resisting the fluctuating, even extreme weather or external load conditions, can instantly react and adapt to them.…”

Section: Introductionmentioning

confidence: 99%

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Shape-changing tensegrity-membrane building skin

et al. 2020

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Building skins are persistently exposed to changes in the weather, including the cases of weather extremes, increasing in frequency due to global climate change. As a consequence of the advancements of digital design tools, the integration of the weather conditions into the design process is much smoother. The impact of the ambient conditions on buildings and their structures can be digitally analyzed as early as in the conceptual design stage. These new design tools stimulate original ideas for shape-changing building skins, actively reacting to the dynamic weather conditions. In the paper, a digital design method is introduced, leading towards the design of a building skin, able of the passive shape adaptation when subjected to the wind. The designed building skin consists of a tensegrity structure where the tensioned elements are substituted by a tensile membrane, creating a self-equilibrated building skin element. In the previous research, a small prototype of this wind-adaptive element was created. The computer simulations are employed to predict the adaptive behavior of a bigger, full-scale building skin element. The before-mentioned building envelope becomes an active player in its surrounding environment, passively reacting to the wind in real-time, thanks to the geometric and material properties. Due to the local shape changes caused by the wind force, the wind can be perceived unconventionally through the adaptive building structure.

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“…The environmental performance of shading systems involves two primary objectives: (i) visual performance, which is solely about preventing glare and maintaining adequate indoor illuminance [31], and (ii) providing acceptable thermal conditions by controlling solar heat gains accompanied with direct and diffuse sunbeams [102]. The adaptive behaviour of advanced shading applications, such as dynamic systems, has promoted consistent criteria [32]. Thus, the functionality of dynamic shading should be determined by the control effectiveness of sunlight levels that penetrate a building daily and yearly [12,33], especially at different sun angles [34], as shown in Fig.…”

Section: Sunlight Control and Shading Mechanismmentioning

confidence: 99%

Dynamic shading systems: A review of design parameters, platforms and evaluation strategies

Al-Masrani

Al-Obaidi

2019

Automation in Construction

Self Cite

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The advancements in software and hardware technologies provide opportunities for solar shading systems to function dynamically within their context. This development has helped dynamic shading systems respond to variable environmental parameters such as sun angles and solar insolation. However, the technical understanding of system design, mechanism and controlling methods presents a challenge for architects and designers. Therefore, this study aims to review the current applications and trends of dynamic shading systems to clarify the potentials and limitations in enhancing system performance based on integrated design objectives. This study assessed several systems on the basis of a critical review to identify different models, applications and methodologies. This study is divided into two main sections: (i) design elements and platforms that engage with specific methods in creating a dynamic shading system and (ii) evaluation strategies to examine system performance. The systems were investigated based on the multiplicity and integration of the parameters involved through various components, such as architectural, mechanical, operational and automation components. The review analysed various studies on the following two bases: (1) geometric-based analysis, which distinguishes between simple and complex shading models, and (2) performancebased analysis, which assesses the shading systems based on two groups of methodologies, namely, theoretical and experimental. The outcome of the review reflects a clear classification of shading models and a comprehensive analysis of their performance. This study generally provides a systematic framework for architects based on thorough research and investigation. Finally, the study introduced several findings and recommendations to improve the performance of dynamic shading systems.

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Biomimetic building skins: An adaptive approach

Cited by 98 publications

References 126 publications

Photobioreactors as a Dynamic Shading System Conceived for an Outdoor Workspace of the State Library of Queensland in Brisbane: Study of Daylighting Performances

Photobioreactors as a Dynamic Shading System Conceived for an Outdoor Workspace of the State Library of Queensland in Brisbane: Study of Daylighting Performances

Shape-changing tensegrity-membrane building skin

Dynamic shading systems: A review of design parameters, platforms and evaluation strategies

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