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Staff Researches

Asmaa Hassan

Parallel Parametric Simulation for Optimizing Non-Conventional Solar Screens: An Approach for Balancing Daylight and Thermal Performance in Hot Arid Climates

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

Ahmed Abin and Sherif Ezzeldien

SDBE, International Conference for Sustainable Design of the Built Environment, London, United Kingdom

2017

Growing interest in digital design tools and generative systems in the architectural discourse, especially parametric systems and optimization algorithms, has the potential to be of greater value if capable of expanding their scope from form generation tools to a more ecological-conscious approach by coupling them with performance simulation tools within a collaborative methodology. The work presented in this paper is a part of a comprehensive study aim to compare between parametric simulations and Genetic Algorithms as a tool to optimize and analysis the effect of non-conventional solar screens on daylight, thermal and energy performance for south façades. This paper focused on the parametric simulation study of a non-conventional solar screen driven by daylight and thermal performance. It integrated simulation tool with parametric design using DIVA, and Grasshopper respectively. The simulations were conducted for a south-oriented office space’s façade in Cairo, Egypt. The screen various parameters; sizes, rotation angles, scale ratios, and protrusion values were modelled parametrically and aligned to this façade. Daylight analysis was conducted using Daylight Dynamic Performance Metrics specifically; Spatial-Daylight-Autonomy (sDA300/50%) and Annual-Sunlight-Exposure (ASE1000/250hr), that comply with both LEED v4 and the new IES approved method, and Daylight Availability. While thermal analysis based on a comparison approach of the thermal performance results to a specific base case. Moreover, the screen shading coefficient was calculated to overcome the current limitations of thermal simulations in sufficiently recognizing the complex geometries such as the proposed screen. Finally, the simulations relied on parallel computing algorithm, which saved time by 8 times more than the default runs. Meanwhile, an algorithm inside Grasshopper was specially developed for this study to overcome current limitation of running parallel thermal runs. The paper presented a comprehensive analysis using an exhaustive search method for the effect of the screen parameters on daylight and thermal performance.

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DAYLIGHTING DRIVEN DESIGN: OPTIMIZING KALEIDOCYCLE FACADE FOR HOT ARID CLIMATE

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

Y. Elghazi, A. Wagdy, S. Mohamed

BauSim 2014-Fifth German-Austrian IBPSA Conference

2014

Facade design has significant impact on daylight. This paper presents a facade based on origami: kaleidocycle rings that can be morphed enhancing daylight performance in residential spaces, which complies with both LEED V4 and Daylight availability. Daylighting analysis was integrated using Grasshopper, Diva and Genetic optimization for a south-oriented living room facade in Cairo, Egypt, through two phases. First phase dealt with base cases of specific typology. Second phase was conducted using parametric optimization process. Results demonstrate that Kaleidocycle rings of 30 cm size and 64 rotation’s angle reached results that exceed LEED v4 requirements while passing Daylight availability standards.

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Middle Income Public Housing In Egypt, Evaluate and Improve to Reach a Sustainable Design.

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

H.Saleh, R.Medhat

Journal of Al Azhar University Engineering Sector, JAUES.

2014

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Parametric Investigation of Three Types of Brick Bonds for Thermal Performance in a Hot Arid Climate Zone

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

Khaled Tarabieh, Sherif Abdelmohsen, Yomna Elghazi, Rana El-Dabaa and Mariam Amer

PLEA 2017 EDINBURGH

2017

Bricks are significant building elements that are heavily utilized, whether for structural or ornamental purposes. Nevertheless, little has been published on the relationship between brick bonding, shape, and extrusion, and the impact on energy performance. This paper investigates the impact of different brick bond types and projections on building energy using a custom algorithm. This investigation was conducted in two phases on 24 cases for a south façade. The first phase investigated three different brick bonds for their thermal performance: Running, English and Flemish bonds. The second phase involves parametric simulations to evaluate energy consumptions for three extrusion values [baseline “no extrusion”, ¼ brick extrusion, and ½ brick extrusion] and four different extrusion percentages (ranging from 15% to 60%). The first phase results show no significant differences in energy performance for the base case. The second phase results show that the performance achieved was 26% less than the base case. This was accomplished using the Flemish bond with either 30% wall area extruded with half brick length, or 60% bricks extruded with quarter brick length. The preliminary findings indicate a relationship between extrusion and energy performance. Further studies should include in-situ testing and investigation of patterns under different climatic zones

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PARAMETRIC DESIGN OPTIMIZATION FOR SOLAR SCREENS: AN APPROACH FOR BALANCING THERMAL AND DAYLIGHT PERFORMANCE FOR OFFICE BUILDINGS IN EGYPT

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

Faculty of Engineering at Cairo University

2016

Architects used to be the chief builder that controls the whole design process starting from early design phases till the final end-product construction. By the time specialization and the use of mass-produced building components spread widely and dominate all industrial fields and architects became more separated from many key aspects of a building’s production. New technologies, including digital generative design and digital fabrication systems can narrow the gap between architectural designs, associative engineering aspects and buildings construction and reintegrate them into a digitally collaborative cycle process where architects is the “chief builder” again. In this regard, parametric generative systems as well as optimization algorithms, have made a major shift in the design process from designing an ‘object’ to design the ‘logic’ of the object, considering parametric optimization approach as a generative-explorative tool. On the other, hand building façade plays a significant role in architecture; it is not only a mean to express the design concepts but it is the main moderator between interior spaces and exterior environment. The increasing reliance of office buildings on air conditioning and artificial lighting systems indicates the failing role of the building facade to perform its function as a moderator. Within this context, ecological facades have proved their potentials for enhancing buildings’ environmental performance. The main aim of this research is to define the effectiveness of both parametric design and Genetic Algorithms approaches for assessing various solar screens’ parameters and to optimize screen configurations that improve both indoor daylight quality and thermal performance while providing minimum energy consumption. The research will discuss the issue through two main parts; Firstly, a theoretical study, based on a comprehensive literature review, was addressed to; firstly, explore daylight and thermal performance fundamentals for office buildings as the main aspects affecting office building current energy raising demands, as well as presenting the building performance metrics, rating systems and simulation tools to establish the basic knowledge for this study. Secondly, investigate the ecological façade strategies and their effects on daylight, thermal and energy performance. This concludes with the integrated methodology that combines daylight and thermal performance for office buildings. Thirdly, investigate the parametric design and optimization algorithms approaches for optimizing building designs to conclude with the parametric design and Genetic Algorithms (GAs) integrated methodologies as generative-analytical design methods for optimizing building designs. Secondly, an empirical study, based on computer simulation, was conducted using combination between the two previous methodologies. Thus, the methodology integrated daylight and thermal simulation tools with paramedic modeling and GAs technique using DIVA, Grasshopper and Galapagos respectively. It was used to generate, evaluate and optimize a non-conventional daigrid-based solar screen different parameters; size, rotation angle, scale ratios and protrusion value, to balance indoor daylight and thermal performance within the minimum possible energy consumption. The simulation was conducted for a south-oriented side lit office space in Cairo, Egypt to optimize a diagrid-based solar screen various parameters; size, rotation angle, scale ratio, and protrusion value. Thus, the thesis presented a comprehensive analysis for the effect of the proposed solar screen different parameters on both daylight and thermal performance for office buildings. It addressed evaluation criteria that could give an indication about cooling loads based on daylight simulation and hence daylighting optimum cases can be sorted regarding thermal and energy performance without calculating them. This research also conducted an analytical comparison between the GAs optimization and parametric simulation approach testing each approach’s effectiveness and limitations in balancing daylight and thermal performance for the proposed solar screen. Finally, two parametric-based optimization method; Modified GAs and Adapted Parametric Algorithm, were suggested to overcome the previous limitations. They could help architects to efficiently optimize any non-conventional solar screen regarding specific performance target.

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The Balance between Daylighting and Thermal Performance Based on Exploiting the Kaleidocycle Typology in Hot Arid Climate of Aswan, Egypt

ASMAA GAMAL ABDELFATTAH ELSAYED HASSAN

A. Wagdy; Y. Elghazi; S. Abdalwahab

AEI 2015

2015

A building's facade has significant impact on energy consumption. This paper investigates a specific facade configuration based on origami: kaleidocycle rings that can be morphed to enhance daylight uniformity and reduce total energy consumed for heating and cooling. This paper utilizes simulation techniques for identifying the most efficient daylight and thermal performance by incorporating parametric optimization using Grasshopper and Diva-for-Rhino. Analysis was conducted using the Daylight Dynamic Performance Metrics (DDPMs) specifically Spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE) based on the new IES approved daylight metrics. The simulation was carried out for a southoriented façade of an office room in Aswan, Egypt, through two phases both used genetic algorithm to drive kaleidocycle parameters. The first phase simulated daylighting for façade optimization which influenced the second phase that run to reach the balance point between daylight and thermal performance. Results demonstrate that kaleidocycle rings of 26 cm size and 64◦ rotation angle exceed the LEED V4 daylighting requirements and achieve a remarkable energy saving of 23% in comparison to non-optimized configuration.

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