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_id ecaade2015_235
id ecaade2015_235
authors Ahmar, Salma El and Fioravanti, Antonio
year 2015
title Biomimetic-Computational Design for Double Facades in Hot Climates - A Porous Folded Façade for Office Buildings
source Martens, B, Wurzer, G, Grasl T, Lorenz, WE and Schaffranek, R (eds.), Real Time - Proceedings of the 33rd eCAADe Conference - Volume 2, Vienna University of Technology, Vienna, Austria, 16-18 September 2015, pp. 687-696
summary Biomimetic design is an approach that is gaining momentum among architects and designers. Computational design and performance simulation software represent powerful tools that help in applying biomimetic ideas in architectural design and in understanding how such proposals would behave. This paper addresses the challenge of reducing cooling loads while trying to maintain daylight needs of office buildings in hot climatic regions. Specifically, it focuses on double skin facades whose application in hot climates is somewhat controversial. Ideas from nature serve as inspiration in designing a porous, folded double façade for an existing building, aiming at increasing heat lost by convection in the façade cavity as well as reducing heat gained by radiation. The cooling loads and daylight autonomy of an office room are compared before and after the proposed design to evaluate its performance.
wos WOS:000372316000076
series eCAADe
email salma_elahmar@yahoo.com
more https://mh-engage.ltcc.tuwien.ac.at/engage/ui/watch.html?id=f87306fc-6e90-11e5-845a-00190f04dc4c
last changed 2016/05/16 09:08

_id caadria2014_279
id caadria2014_279
authors Austern, Guy; Soungmin Yu, Mara Moral and Theerapat Jirathiyut
year 2014
title The Urban Genome
source Rethinking Comprehensive Design: Speculative Counterculture, Proceedings of the 19th International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2014) / Kyoto 14-16 May 2014, pp. 263–272
summary The influence of urban morphology on the energy consumption of a fabric has been recently established by research into the energy use of existing cities. This paper suggests a framework for generating environmentally adapted urban tissue by using genetic algorithms as form-finding processes. A series of multi-objective optimization algorithms are described. The geometric abstractions used as a basis for these algorithms are illustrated in detail, and the results and implications of these types of simulations are discussed. The methodology developed within this paper was tested on one km2 site in three cities of varying climates, and further expanded into a detailed case study within one city.
keywords Urban simulation; Environmental design; Optimization; Genetic Algorithms; Urban Morphology
series CAADRIA
email guyaustern@gmail.com
last changed 2014/04/22 08:23

_id caadria2018_029
id caadria2018_029
authors Ayoub, Mohammed
year 2018
title Adaptive Façades:An Evaluation of Cellular Automata Controlled Dynamic Shading System Using New Hourly-Based Metrics
source T. Fukuda, W. Huang, P. Janssen, K. Crolla, S. Alhadidi (eds.), Learning, Adapting and Prototyping - Proceedings of the 23rd CAADRIA Conference - Volume 2, Tsinghua University, Beijing, China, 17-19 May 2018, pp. 83-92
summary This research explores utilizing Cellular Automata patterns as climate-adaptive dynamic shading systems to mitigate the undesirable impacts by excessive solar penetration in cooling-dominant climates. The methodological procedure is realized through two main phases. The first evaluates all 256 Elementary Cellular Automata possible rules to elect the ones with good visual and random patterns, to ensure an equitable distribution of the natural daylight in internal spaces. Based on the newly developed hourly-based metrics, simulations are conducted in the second phase to evaluate the Cellular Automata controlled dynamic shadings performance, and formalize the adaptive façade variation logic that maximizes daylighting and minimizes energy demand.
keywords Adaptive Façade; Dynamic Shading; Cellular Automata; Hourly-Based Metric; Performance Evaluation
series CAADRIA
email dr.ayoub@aast.edu
last changed 2018/05/17 07:08

_id ascaad2012_016
id ascaad2012_016
authors Bourbia, Fatiha ; Yasmina Bouchahm and Ouarda Mansouri
year 2012
title The Influence of Albedo on the Urban Microclimatic Street Canyon
source CAAD | INNOVATION | PRACTICE [6th International Conference Proceedings of the Arab Society for Computer Aided Architectural Design (ASCAAD 2012 / ISBN 978-99958-2-063-3], Manama (Kingdom of Bahrain), 21-23 February 2012, pp. 159-169
summary In city, when temperatures run higher than those in suburban and rural areas, this generate a phenomenon called Urban Heat Island (UHI), this effect occurs, primarily because growing numbers of buildings have supplanted vegetation and trees. The main causes of the different microclimatic conditions in cities are linked among other parameters to urban geometry which influences incoming and outgoing radiations as well as surface material properties, such as color and texture. In hot climates the elevated surface temperatures of materials directly affect, not only the urban microclimate, but also thermal comfort conditions in urban open spaces. In order to evaluate the microclimate variation of urban street canyon compared to the variation of walls and ground surfaces materials, series of field simulation are used by software tool , Envi-met v3.0, in down town of Constantine, Algeria.
series ASCAAD
email someg1@hotmail.com
more http://www.ascaad.org/conference/2012/papers/ascaad2012_016.pdf
last changed 2012/05/15 18:46

_id 0e89
authors Bradford, J.W., Cheng, N. and Kvan, Thomas
year 1994
title Virtual Design Studios
source The Virtual Studio [Proceedings of the 12th European Conference on Education in Computer Aided Architectural Design / ISBN 0-9523687-0-6] Glasgow (Scotland) 7-10 September 1994, pp. 163-167
summary Beginning in 1993, small groups of students of architectural design at different institutions around the world participated in collaborative design projects using a variety of tools, including CAD, Internet and teleconferencing. This programme, known as the "Virtual Design Studio" (VDS), allows students to work collectively with colleagues from different cultures and climates who are thousands of kilometres and in different time zones. Most recently, in February 1994, four institutions in N. America, one in Europe, and one in S E Asia participated in VDS’94. This paper explains the operation of the VDS and explores the future of the VDS as a potential tool for architectural design education. In particular, we review what we have learned in employing computer tools to extend the teaching in design studios into a "virtual" experience.
series eCAADe
type normal paper
email tkvan@arch.hku.hk
last changed 2010/07/01 05:20

_id cf2019_002
id cf2019_002
authors De Luca, Francesco
year 2019
title Environmental Performance-Driven Urban Design Parametric Design Method for the Integration of Daylight and Urban Comfort Analysis in Cold Climates
source Ji-Hyun Lee (Eds.) "Hello, Culture!"  [18th International Conference, CAAD Futures 2019, Proceedings / ISBN 978-89-89453-05-5] Daejeon, Korea, p. 21
summary Shape of built environment and image of cities are significantly influenced by environmental factors such as access to natural light, air temperature and wind. Adequate quantity of daylight in building interiors is important for occupant wellbeing and energy saving. In Estonia minimum quantity of daylight is required by building standards. Wind speed increased by urban environment at northern latitudes can significantly reduce pedestrian perceived temperature during winter inducing strong cold stress. This paper presents a method for the integration of parametric modeling and environmental simulations to analyze interiors and exteriors comfort of tower building cluster variations in different urban areas in Tallinn. Optimal pattern characteristics such as buildings distance and alignment favoring improvement of interiors daylight and decrease of pedestrian cold stress are presented and discussed.
keywords Daylight, Urban Comfort, Environmental Analysis, PerformanceDriven Urban Design, Parametric Design
series CAAD Futures
email francesco.deluca@taltech.ee
last changed 2019/07/29 12:08

_id cf2019_038
id cf2019_038
authors El-Dabaa, Rana and Sherif Abdelmohsen
year 2019
title HMTM: Hygromorphic-Thermobimetal Composites as a Novel Approach to Enhance Passive Actuation of Adaptive Façades
source Ji-Hyun Lee (Eds.) "Hello, Culture!"  [18th International Conference, CAAD Futures 2019, Proceedings / ISBN 978-89-89453-05-5] Daejeon, Korea, pp. 290-300
summary Typical adaptive facades rely on mechanical actuators that respond to the outdoor climate and regulate its effect on indoor spaces. With the emergence of ubiquitous computing, several studies have independently utilized the latent properties of programmable materials, such as the hygroscopic properties of wood and the difference in expansion coefficient of metals, to passively program material response. Motion stimuli vary for each material however, involving changes in humidity and temperature fluctuation for wood and metals respectively. This paper introduces Hygromorphic-Thermobimetal (HMTM), as a low-tech low-cost passive programmable composite. A series of physical experiments are conducted to deduce design parameters that induce specific actuation mechanisms based on the stimulation of both hygroscopic properties in wood and metal expansion through temperature variation. This allows for an extended implementation of the hygroscopic properties of wood and its actuation configurations in hot arid climates, where variation in temperature, rather than humidity, is more dominant.
keywords Hygroscopic properties of wood, Passive actuation, Thermobimetals, Programmable materials, Adaptive façades
series CAAD Futures
email rana.bahaa@aast.edu
last changed 2019/07/29 12:15

_id acadia08_208
id acadia08_208
authors Griffiths, Jason
year 2008
title Man + Water + Fan = Freshman: Natural Process of Evaporative Cooling and the Digital Fabrication of the ASU Outdoor Dining Pavilion
source Silicon + Skin: Biological Processes and Computation, [Proceedings of the 28th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) / ISBN 978-0-9789463-4-0] Minneapolis 16-19 October 2008, 208-213
summary To the east of Johnson City TX is the Lyndon B. Johnson’s family home. Part of the Johnson Estate2 is given over to a working farm circa 1870 that presents various aspects of domestic practice from the era. This includes a desert fridge which is a simple four-legged structure with a slightly battered profile that’s draped in calico. Its principle is simple; water from an upturned jar is drawn by osmosis down the sides of the calico where it evaporates in wind currents drawn though a “dog run” between two log cabins. Cooled air circulates within the structure and where cheese and milk are kept fresh during the summer. The desert fridge is a simple system that reaches a state of equilibrium through the natural process of evaporation. ¶ This system provides a working model for a prototype structure for an outdoor dining pavilion that was designed and constructed on the campus of Arizona State University. The desert fridge is the basis for a “biological process”3 of evaporative cooling that has been interpreted in terms a ritual of outdoor dining in arid climates. The pavilion is intended as a gathering point and a place of interaction for ASU freshmen. The long-term aim of this project is to provide a multiple of these pavilions across the campus that will be the locus of a sequence of dining events over a “dining season”4 during the fall and spring semester. ; This paper describes how the desert fridge principle has been interpreted in the program and construction of the dining pavilion. It explores a sequence of levels by which the structure, via digital production process, provides an educational narrative on sustainability. This communicative quality is portrayed by the building in direct biological terms, through tacit knowledge, perceived phenomena, lexical and mechanical systems. The paper also describes how these digital production process were used in the building’s design and fabrication. These range from an empirical prognosis of evaporative cooling effects, fluid dynamics, heat mapping and solar radiation analysis through to sheet steel laser cutting, folded plate construction and fully associative variable models of standard steel construction. The aim of the pavilion is to create an environment that presents the evaporative cooling message at a multiple of levels that will concentrate the visitor in holistic understanding of the processes imbued within the building.5
keywords Communication; Digital Fabrication; Environment; System
series ACADIA
last changed 2009/02/26 07:39

_id e7c8
authors Kalisperis, Loukas N., Steinman, Mitch and Summers, Luis H.
year 1992
title Design Knowledge, Environmental Complexity in Nonorthogonal Space
source New York: John Wiley & Sons, 1992. pp. 273-291 : ill. includes bibliography
summary Mechanization and industrialization of society has resulted in most people spending the greater part of their lives in enclosed environments. Optimal design of indoor artificial climates is therefore of increasing importance. Wherever artificial climates are created for human occupation, the aim is that the environment be designed so that individuals are in thermal comfort. Current design methodologies for radiant panel heating systems do not adequately account for the complexities of human thermal comfort, because they monitor air temperature alone and do not account for thermal neutrality in complex enclosures. Thermal comfort for a person is defined as that condition of mind which expresses satisfaction with the thermal environment. Thermal comfort is dependent on Mean Radiant Temperature and Operative Temperature among other factors. In designing artificial climates for human occupancy the interaction of the human with the heated surfaces as well the surface-to-surface heat exchange must be accounted for. Early work in the area provided an elaborate and difficult method for calculating radiant heat exchange for simplistic and orthogonal enclosures. A new improved method developed by the authors for designing radiant panel heating systems based on human thermal comfort and mean radiant temperature is presented. Through automation and elaboration this method overcomes the limitations of the early work. The design procedure accounts for human thermal comfort in nonorthogonal as well as orthogonal spaces based on mean radiant temperature prediction. The limitation of simplistic orthogonal geometries has been overcome with the introduction of the MRT-Correction method and inclined surface-to-person shape factor methodology. The new design method increases the accuracy of calculation and prediction of human thermal comfort and will allow designers to simulate complex enclosures utilizing the latest design knowledge of radiant heat exchange to increase human thermal comfort
keywords applications, architecture, building, energy, systems, design, knowledge
series CADline
last changed 2003/06/02 08:24

_id c71c
authors Li, Jian Cheng
year 1996
title Study on Computer-aided Design of Shading Device of a Building
source CAADRIA ‘96 [Proceedings of The First Conference on Computer Aided Architectural Design Research in Asia / ISBN 9627-75-703-9] Hong Kong (Hong Kong) 25-27 April 1996, pp. 143-151
summary The design of shading device is an important aspect of architectural heat-prevent design in sub-tropical climates of China. There is a large amount of calculation how to choose suitable style and size of shading device for various window in each exposure of a building, for the aim of both sheltering from sunlight indoors and preserving proper sun-shining time in a room. The solution of the calculation for the design of shading device is presented in this paper.
series CAADRIA
last changed 1999/01/31 14:07

_id 4d7d
id 4d7d
authors Marionyt Tyrone Marshall
year 2010
title HYGROSCOPIC CLIMATIC MODULATED BOUNDARIES: A Strategy for Differentiated Performance Using a Natural Circulative and Energy Captive Building Envelope in Hot and Moisture Rich Laden Air Environments
source Perkins+Will Research Journal, Vol 02.01, 41-53
summary The operation and construction of buildings account for almost half of the energy use in the United States. To meet global climate change targets, energy consumption of buildings in the long term must be reduced as well as carbon dioxide emissions. This article explores a theoretical building envelope that generates energy and produces water by drawing water vapor out of the air to deliver new sources of water; it lowers indoor humidity in hot and humid climates. The design in this model considers materiality, surface area and environmental conditions to influence build- ing form. The case in this article considers materials and systems application in the design of the building envelope. The hygroscopic building envelope design strategically senses varying conditions of concentration and density of moisture laden air to provide visual indications of its performance. It is a building skin that emulates biological processes by creating pressure differences and transferring energy in various forms.
keywords biomimetics, building envelope, building façade, computational design, computational control, humidity, hygroscopic, renewable resources
series journal paper
type normal paper
email tyrone.marshall@digitecture.org
more http://www.perkinswill.com/research/research-journal-vol.-02.01.html
last changed 2010/10/31 00:39

_id caadria2019_345
id caadria2019_345
authors Marschall, Max and Burry, Jane
year 2019
title Can the Use of Stochastic Models of Occupants' Environmental Control Behavior Influence Architectural Design Outcomes? - How field data can influence design outcomes
source M. Haeusler, M. A. Schnabel, T. Fukuda (eds.), Intelligent & Informed - Proceedings of the 24th CAADRIA Conference - Volume 1, Victoria University of Wellington, Wellington, New Zealand, 15-18 April 2019, pp. 715-724
summary Thermal comfort research has shown that natural ventilation can reduce energy consumption while increasing comfort. However, giving occupants control over their environment introduces uncertainty into building performance which is challenging to emulate using current simulation techniques. Traditionally, window operation is modelled deterministically, for instance by assuming windows to be opened at a predefined temperature. Studies have shown this to be inaccurate, often causing large discrepancies between simulated and actual performance; instead, probabilistic models have emerged based on field study data. The literature on this topic is currently limited to building science and lacks an analysis of how these insights may affect architecture. In a design study, we used evolutionary computation to determine comfort-optimized housing designs for various climates, each time comparing the results of both window operation models. The resulting designs varied considerably; most notably, using the stochastic approach resulted in more shading elements, especially in warmer climates.
keywords window operation model; stochastic; natural ventilation; thermal comfort; occupant behavior
series CAADRIA
email max.g.marschall@gmail.com
last changed 2019/04/16 08:22

_id ascaad2016_025
id ascaad2016_025
authors Mohamadin, Mahmoud F.; Ahmed A. Abouaiana and Hala H. Wagih
year 2016
title Parametric Islamic Geometric Pattern for Efficient Daylight and Energy Performance - Façade retrofit of educational space in hot arid climate
source Parametricism Vs. Materialism: Evolution of Digital Technologies for Development [8th ASCAAD Conference Proceedings ISBN 978-0-9955691-0-2] London (United Kingdom) 7-8 November 2016, pp. 227-236
summary The purpose of this paper is to reach an optimal Islamic geometric pattern (IGP) shading screen design in terms of daylight and energy performance in an existing educational design studio (EDS) using generative design and simulation techniques. The study was carried out in a hot arid climate, in a typical EDS in 6th October University, located in Cairo, Egypt, and the study focused on the north-east oriented façade. Grasshopper for Rhino was utilized to generate the IGP parametric variations. Diva-For-Rhino which performs daylight analysis using Radiance / DAYSIM, and Design Builder which performs thermal load simulations using EnergyPlus were utilized in simulation. The results of the study achieved the required daylight levels with significant reduction of energy consumption levels of cooling load. This shows the affordance of the parametric IGP shading screens in façade treatment for achieving both efficient daylight and energy performance in educational design studio in hot arid climates.
series ASCAAD
email mahmoud.mohamadin@fue.edu.eg
last changed 2017/05/25 11:31

_id ecaadesigradi2019_183
id ecaadesigradi2019_183
authors Mughal, Humera and Beirao, Jose
year 2019
title A Workflow for the Performance Based Design of Naturally Ventilated Tall Buildings Using a Genetic Algorithm (GA)
source Sousa, JP, Xavier, JP and Castro Henriques, G (eds.), Architecture in the Age of the 4th Industrial Revolution - Proceedings of the 37th eCAADe and 23rd SIGraDi Conference - Volume 2, University of Porto, Porto, Portugal, 11-13 September 2019, pp. 645-654
summary Optimization of Natural Ventilation process in highrise buildings is one of the most complex and least addressed phenomenon in the field of sustainable architecture. This issue requires urgent consideration to reduce the computation time due to fast growing demand of vertical construction in metropolitan cities. Until recently most highrise buildings have been operated with mechanical systems, causing high energy loads in hot climates and have high carbon footprints. Highrise buildings with natural ventilation and sky gardens can address these problems. This study involves the development of a Genetic Algorithm (GA) addressing the multi objective optimization of natural ventilation in tall buildings incorporated with Sky-Gardens at different levels all connected through a central ventilation shaft. The fitness function for this GA is composed of three scales; temperature reduction due to evapotranspiration of plants of sky-gardens, optimum wind velocity for channelizing air inside the corridors and ventilation shaft, and optimum building configuration. The aim is to find the best solutions for tall buildings constructed in hot climate through the provision of optimized airflow paths suitable for the effectiveness of natural ventilation, within a reasonably short computation time for supporting design processes at early stage.
keywords Optimization; Natural Ventilation; Tall buildings; Genetic Algorithms
series eCAADeSIGraDi
email humera.mughal@unipa.it
last changed 2019/08/26 20:27

_id ecaade2013_272
id ecaade2013_272
authors Ozel, Filiz
year 2013
title SolarPierce: A Solar Path Based Generative System
source Stouffs, Rudi and Sariyildiz, Sevil (eds.), Computation and Performance – Proceedings of the 31st eCAADe Conference – Volume 1, Faculty of Architecture, Delft University of Technology, Delft, The Netherlands, 18-20 September 2013, pp. 127-134
summary In hot and arid climates, limiting solar heat gain while also providing daylight into a structure is a major concern in building design. Building skin that gradually changes in porosity can help limit solar heat gain. Since solar heat gain is primarily a problem during summer, the path the sun follows during summer must be taken into account in determining opening sizes. In this paper, the researcher reports on a study where a generative system called SolarPierce was developed using AutoLISP, the scripting language of AutoCAD, to generate solid geometry for a building skin based on the sun’s path in a given geographical area. The system automatically punches different size openings in a given shell structure where openings facing the sun are the smallest and those fully facing away from the sun are the largest. Opening sizes gradually change from a given minimum to a given maximum depending on how much they face the sun.
wos WOS:000340635300012
keywords Solar; generative system; building skin; dome; shell structure.
series eCAADe
email ozel@asu.edu
last changed 2016/05/16 09:08

_id caadria2013_068
id caadria2013_068
authors Pedersen, Jens and Andy VanMater
year 2013
title Resource Driven Urban Metabolism – How Can Metabolic Scaling be Used in Urban Design?
source Open Systems: Proceedings of the 18th International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2013) / Singapore 15-18 May 2013, pp. 561-570
summary City scale projects are complex multivariable problems and have previously been addressed using a variety of organisational principles, whether it be the infrastructural grid, used by Ludwig Hilbersheimer in his project “Hochhausstadt” or the spinal organisation of the Tokyo Masterplan done by Kenzo Tange and the Metabolist Movement. This project strays from traditional methods of structuring a city and investigates a novel self-engineered anticipatory model, which focuses on the use of generative and genetic algorithms to develop a new associative system to develop coastal cities in arid climates. The system functions as a negative feedback loop, analysing existing conditions, and by a series of mathematical functions, projecting the new growth patterns for major components of a city, such as building envelopes, road networks, canal networks and public space distribution as a result of the cities internally generated resources.  
wos WOS:000351496100055
keywords Computational design, Generative & evolutionary design, Tooling, City modelling, Urban metabolism 
series CAADRIA
email jenspedersen88@gmail.com
last changed 2016/05/16 09:08

_id 0e5d
authors Reed, Raymond D.
year 1988
title The Teaching of Computer Assisted Sustainable Architectural Design
source Computing in Design Education [ACADIA Conference Proceedings] Ann Arbor (Michigan / USA) 28-30 October 1988, pp. 111-122
summary Sustainable architecture is high-tech, energy and resource conserving architecture that sustains and increases the human and natural carrying capacity of the host environment. This paper presents a computer assisted design process to teach sustainable architectural design.

The energy performance of a base case building in each of four climates and cultures is presented. The climates are: Phoenix (hotdry), Minneapolis (cold-dry), Boston (cold-humid), and New Orleans ( hot- humid). Keeping the host climate, site, building size and function constant: but varying materials, shape and design concepts, each base case is iterated through a series of computer assisted re-designs to transform each base case building into an architecture representative of its regional climate and culture.

Traditional technologies and concepts produce traditional regional architecture. New technologies and concepts produce forms expressive of an emerging high-tech, high-touch, low energy society.

The paper presents computer generated work by the author and his students. It also presents an interim evaluation of the successes and difficulties of conducting a 'paper free' design studio.

series ACADIA
last changed 1999/01/01 18:27

_id ecaade2014_023
id ecaade2014_023
authors Salma El Ahmar and Antonio Fioravanti
year 2014
title Botanics and Parametric Design Fusions for Performative Building Skins - An application in hot climates
source Thompson, Emine Mine (ed.), Fusion - Proceedings of the 32nd eCAADe Conference - Volume 2, Department of Architecture and Built Environment, Faculty of Engineering and Environment, Newcastle upon Tyne, England, UK, 10-12 September 2014, pp. 595-604
summary Biomimicry and computational design are two growing fields of research and practice in architecture for their potential in performative and sustainable design, among many other benefits. Cooling loads are posing serious energy problems in hot climatic cities as in Cairo and Alexandria. Attempting to solve these problems, this research turned to botanical inspirations for ideas in order to improve thermoregulation of the building skin. One of these ideas was chosen and implemented using computational software in the design of a parametric vertical shading screen for a typical office room in Cairo. The challenge was to minimize cooling loads as much as possible without compromising daylight requirements. An evolutionary solver was used to optimize results and environmental simulations were performed before and after the proposed screen to assess its performance and evaluate this biomimetic-computational approach to design.
wos WOS:000361385100062
keywords Biomimicry; building skin; thermoregulation; parametric design; hot climates
series eCAADe
email salma_elahmar@yahoo.com
last changed 2016/05/16 09:08

_id cf2011_p104
id cf2011_p104
authors Sherif, Ahmed; El Zafarany Abbas
year 2011
title Designing the Window to Fit a Shading Device, A Reversed Method for Optimizing Energy Efficient Fenestration
source Computer Aided Architectural Design Futures 2011 [Proceedings of the 14th International Conference on Computer Aided Architectural Design Futures / ISBN 9782874561429] Liege (Belgium) 4-8 July 2011, pp. 383-399.
summary Solar radiation passing through a window contributes significantly to cooling loads and energy consumption, especially in hot climates. Most CAAD tools handling energy efficient design help designers to define the optimal shading device to protect a window of a certain shape, usually a rectangle, but some parts of the rectangular window (such as lower corners) are typically difficult to protect. Usually the whole shading device becomes bigger to shade these corners, which over-shades the rest of the window, increasing artificial lighting and heating loads. It also increases the complexity, visual impact and cost of the shading device. Changing the shape of the window by cutting these corners may reduce the size of the shading device considerably, which opens way to a different –or even a reversed- approach: “Designing the window to fit a shading device instead of designing the shading device to fit the window!” This approach has several potential applications. The building form itself sometimes works implicitly as a shading device. For example, if the building plan shape is a U or L shape, some parts of the walls become shaded, the windows can be placed in these shaded parts, and the window shape can be designed to fit the shadow pattern caused by the building form, changes in the building profile gives similar chances to design windows that fit the shadow pattern. Conceptually, this approach makes energy efficiency a form giving attribute, helping to create innovative facades, while giving an energy efficient configuration for both window and its shading device. CAAD tools can help the designer adopt such an innovative approach, by proposing the window shape that suits an arbitrary shading device created by the designer or a building mass. This paper examines the validity of the approach and introduces the approach required for developing a software module that can be integrated with other CAAD tools such as the Ecotect software. This would enable the designers to use this approach. The method handles the complexity of time-dependent solar geometry and radiation intensity, the geometry of both the window and shading device, and the designers set of objectives, enabling the designer to define the required configuration of window and shading device.
keywords Energy Efficiency, Low Energy Architecture, Windows, Shading Devices, Algorithm, Oprimization
series CAAD Futures
email asherif@aucegypt.edu
last changed 2012/02/11 18:21

_id acadia10_88
id acadia10_88
authors Steinfeld, Kyle; Bhiwapurkar, Pravin; Dyson, Anna; Vollen, Jason
year 2010
title Situated Bioclimatic Information Design: a new approach to the processing and visualization of climate data
source ACADIA 10: LIFE in:formation, On Responsive Information and Variations in Architecture [Proceedings of the 30th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-4507-3471-4] New York 21-24 October, 2010), pp. 88-96
summary Currently, most approaches to graphic evaluative frameworks (GEFs) for the early-stage evaluation of bioclimatic design strategies adopt a design-tool metaphor, wherein a battery of analytical routines is performed by a software tool based upon a standardized weather file from which a stock set of graphic material is produced. In seeking to evaluate a broad range of climates and to address a wide variety of passive design strategies, existing climate visualization and evaluation tools position themselves far outside of the context of a situated design problem. Remaining agnostic to the particularities of site, program, tectonic system, and material behavior these tools become, by definition, generic. As a consequence, while such design-tools can be effective in evaluating particular relationships between environmental resource, demand profile, and built-system, they maintain a potential to be rendered ineffective in any outlying cases not specifically anticipated by their authors . Situated Bioclimatic Information Design (SBID) presents an alternative approach that targets a class of design strategies prominent among these outlying cases: those highly responsive to negotiation between the continually fluctuating resources within microclimates and the fluctuating demand profile of the building program. Using a custom-built weather data parser a number of diagrams and data visualizations have been produced under this approach. These visualizations are not only useful in and of themselves for aligning design strategies to specific contexts, but they also illustrate the foundations of a larger theoretical framework for the processing and visualization of climatic data for effective utilization of bioclimatic flows.
series ACADIA
type normal paper
email steink@rpi.edu
last changed 2010/11/10 06:27

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