References of "Attia, Shady"
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See detailConceptual framework for off-site roof stacking construction
Amer, Mohamed ULiege; Mustafa, Ahmed Mohamed El Saeid ULiege; Attia, Shady ULiege

in Journal of Building Engineering (2019), 26

A great deal of interest in off-site construction has been remarkable over the last decade. However, building on the rooftops of existing building has not been given a significant importance as a subject ... [more ▼]

A great deal of interest in off-site construction has been remarkable over the last decade. However, building on the rooftops of existing building has not been given a significant importance as a subject of research, despite its dependence on off-site construction and prefabrication. Thus, this paper develops a novel conceptual framework to support a multidisciplinary decision making for selecting off-site prefabricated constructional system for roof stacking. The multidisciplinary approach includes each of safety, logistics, cost, time, environmental impact, and quality of construction as major criteria in the decision making process. This paper is the outcome of an exhaustive investigation of more than 136 roof stacking projects built during the last 20 years. The development of framework is supported by a feedback validation loop based on semi-structured interviews with experts in the field of roof stacking and off-site construction. [less ▲]

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See detailComparative bioclimatic approach for comfort and passive heating and cooling strategies in Algeria
Semahi, Samir; Zemmouri, Noureddine; Kumar Singh, Manoj et al

in Building and Environment (2019), 161

The energy consumption and thermal comfort in buildings are heavily affected by weather conditions. Therefore, the aim of this paper is to analyze the bioclimatic potential of Algerian climate zones. This ... [more ▼]

The energy consumption and thermal comfort in buildings are heavily affected by weather conditions. Therefore, the aim of this paper is to analyze the bioclimatic potential of Algerian climate zones. This analysis was made based on eight representative locations using recent weather datasets (2003–2017). The thermal comfort and passive design potential analysis were based on a psychometric chart applying the adaptive comfort model ASHRAE 55–2017. In addition, an evaluation of the bioclimatic potential was conducted using simulations of a monitored and calibrated residential building model in Algeria using EnergyPlus. The building model has been tested in eight previously selected locations. The heating and cooling energy load results were calculated for each climatic zone and compared. The results allow architects and urban planners to better understand the climate and provide practical design guidance. [less ▲]

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See detailAdaptive Facades Performance Assessment, interviews with facade experts
Attia, Shady ULiege; Bilir, Senem; Safy, Taha et al

Report (2019)

Adaptive facades can ensure step-change progresses in the energy efficiency and the use of renewable energy while improving the comfort of the occupants. Therefore, the purpose of this structured ... [more ▼]

Adaptive facades can ensure step-change progresses in the energy efficiency and the use of renewable energy while improving the comfort of the occupants. Therefore, the purpose of this structured interview is to assess advantages, disadvantages and future expectations considering the adaptive facades. This work is a part of actions of The COST Action TU1403 Adaptive Façade Network. The objective of this report is to gain an understanding of how experts currently define adaptive façade systems, which simulation tools they use, the major strengths, weaknesses, opportunities and treats of adaptive façade systems, key performance indicators they use and their vision for the future of adaptive facades. With this information gathered, it is anticipated that adaptive façade professionals will carry on assessment of adaptive facades. A qualitative study design was employed, using semi-structured interviews. Interviewees working in academia and practice were selected. The interviewees represented the range of possible adaptive facade professionals, from researchers and designers considered optimization in the assessment of adaptive facades. Also, every interviewed expert was asked to approve their responses and add any additional comment to their answers. [less ▲]

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See detailDevelopment and validation of a survey for wellbeing and interaction assessment by occupants in office buildings with adaptive facades
Attia, Shady ULiege; Garat, S; Cools, Mario ULiege

in Building and Environment (2019), 157

Assessing well-being and occupants satisfaction is a growing concern in façade design practice, as increasing recognition of the value of well-being of occupants in office buildings. The objective of this ... [more ▼]

Assessing well-being and occupants satisfaction is a growing concern in façade design practice, as increasing recognition of the value of well-being of occupants in office buildings. The objective of this study was to develop a validated survey for evaluating the indoor environmental quality in office buildings with adaptive facades to provide feedback to designers and operators and inform the building community at a large. A total of 70 employees completed an initial survey containing 14 questions grouped into six domains (OCAFAS-14). Factor analysis of the responses was performed resulting into a final survey grouped into three domains and containing 15 questions (general feeling, thermal comfort and acoustic comfort) (OCAFAS-15). Statistical analysis indicated that the OCAFAS-15 had good validity, reliability, and internal consistency. The survey succeeded to benchmark well-being, satisfaction and interaction changes of employees in an open-space office with dynamic louvers. The results indicates that the OCAFAS-15 provides a basis for dialogue between occupants and façade engineers regarding the user interaction, façade control adaptation and in particular in tracking of changes of indoor environmental quality, evaluating response of facades to occupants’ requirements, and guiding the operation of adaptive facades. A validated well-being and occupant interaction survey could be particularly useful in benchmarking building with adaptive facades and recognizing and managing occupants’ dissatisfaction in buildings with dynamic facades. [less ▲]

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See detailProjecting the impact of climate change on design recommendations for residential buildings in Iran
Roshan, Gh.R.; Oji, Rohalah; Attia, Shady ULiege

in Building and Environment (2019), 155

The outdoor climate is changing. In order to assure thermal comfort in new and existing residential buildings we need to revise and adapt our building designs. Therefore, 10 meteorological stations in ... [more ▼]

The outdoor climate is changing. In order to assure thermal comfort in new and existing residential buildings we need to revise and adapt our building designs. Therefore, 10 meteorological stations in Iran were selected to investigate and predict the influence of climate change on the local climate diversity and variability. In order to provide a comfortable and healthy indoor environment, bioclimatic design recommendations during early design stages were revised, including during the two periods of 1986-2015 and 2020-2050. A modified Givoni`s bioclimatic chart was used to visualize the climate variation and to inform designers about accurate and climate-proof bioclimatic design recommendations. The second-generation Canadian Earth System Model was used to predict changes in the maximum and minimum temperature and relative humidity components of future decades. Based on Representative Concentration Pathway (RCP) 2.6, RCP 4.5, and RCP 8.5 for the greenhouse gas emission section of the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, the effects of climate change on different cooling and heating strategies were examined. The findings of this study showed that for all the studied stations, apart from Abadan, the trend in temperature increase over the coming decades is not unforeseen. The use of heating strategies will decrease, and the use of cooling strategies will increase. Finally, this study presents an adjusted bioclimatic chart of Iran and quantifies the adaptation measures to climate change to reduce energy use and avoid overheating. [less ▲]

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See detailAssessment of thermal overheating in free-running buildings in Cairo
Attia, Shady ULiege; Mustafa, Ahmed Mohamed El Saeid ULiege; Singh, Manoj Kumar

in Finlayson, Will; Roaf, Susan (Eds.) PROCEEDINGS OF THE 1ST INTERNATIONAL CONFERENCE ON COMFORT AT THE EXTREMES: ENERGY, ECONOMY AND CLIMATE (2019, April 10)

Assessing human health under climate change in hot climates is of particular importance in the Middle East. Cairo is one of those cities that have an estimated 2018 population as high as 13 million, with ... [more ▼]

Assessing human health under climate change in hot climates is of particular importance in the Middle East. Cairo is one of those cities that have an estimated 2018 population as high as 13 million, with a metropolitan population of 21 million, which makes it the largest city in Africa and the Middle East. In and around Cairo, many of the summer seasonal deaths are blamed on human discomfort due to anthropogenic climate change. High urban population density, urban heat island effect, cramped living conditions including housing, schools and prisons are all reasons to the increase of heat-related health problems in Cairo. Therefore, this initial study investigates and maps overheating in free-running residential buildings in Cairo. The study follows a combined, monitoring and observational assessment of the 2015 heat wave (19-day event) in Egypt. Using surface urban heat island maps, representative urban areas were determined and field measurements were carried out to assess indoor air temperatures and relative humidity. This was followed by observational field visits and interaction with local citizens to document the impacts and adaptation measures corresponding to overheating. The paper provides insights on indoor human discomfort with a focus on physical and non-physical heat stress reasons during climate extremes. The study provides initial insights on thermal comfort that can prompt local professionals and governments to address overheating and thermal stress in free-running residential buildings. [less ▲]

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See detailA Framework for Cost-Optimal Zero-Energy Lightweight Construction
Amer, Mohamed ULiege; Attia, Shady ULiege

in 2019 Proceedings of the Symposium on Simulation for Architecture & Urban Design (2019, April 09)

During the last decade, several roof extensions took place in the European cities with the purpose to increase the height of existing buildings using timber as a lightweight material. However, building ... [more ▼]

During the last decade, several roof extensions took place in the European cities with the purpose to increase the height of existing buildings using timber as a lightweight material. However, building regulations and green codes do not usually guarantee the achievement of multi-objective and highly performance roof extensions. Accordingly, this research aims to develop a state of the art framework to achieve cost-optimal zero-energy for timber construction, specifically when building on rooftops. Through a simulated and calibrated passive house model, the boundary conditions of the study have been identified and further parametric simulation and optimization have been carried out. This research aims at linking scientific research with practice. The framework provides a fast track measurement that provides a solutions space for building engineers who are in charge of decision making on the design and construction process. Best practices of roof construction could be achieved in terms of cost and energy, giving a vast potential for a complete and deep renovation, and, therefore, reducing the overall ecological footprint on the city level. [less ▲]

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See detailThe impact of climate change on Building Energy Simulation (BES) uncertainty - Case study
Elrawy, Omar; Attia, Shady ULiege

in Architecture, Engineering and Technology (2019, March 30)

Climate change and global warming are two major concerns over the globe today, and the rapid change in climate became more sensible as it impacts diverse industries and disciplines. Buildings share of the ... [more ▼]

Climate change and global warming are two major concerns over the globe today, and the rapid change in climate became more sensible as it impacts diverse industries and disciplines. Buildings share of the global energy use exceeds 40%, and buildings’ Green House Gas (GHG) emmissions resembles one-third of global GHG emmissions (Tranchard, 2017); hence, Building Energy Simulation (BES) process became an essential step during building design, to study and minimize whole buildings’ energy use, and consequently minimize buildings’ carbon footprint. A significant, yet underestimated, input to the BES process is the weather data; BES process normally uses historical weather data in the form of a weather file to simulate the building’s outdoor conditions, those outdoor conditions impacts the amount of thermal load on the building, and therefore they significantly impact building’s estimated annual energy use. Today, with the rapid change in the outdoor weather conditions year after year, using those historical weather data files must be questioned, as they impact the estimated energy use, and consequently put what’s deemed as the “optimum energy use” in question. Using those historical weather data is hence expected to increase BES degree of uncertainty. This paper studies and quantizes the impact of weather data accuracy on building’s annual energy performance. The paper takes an experimental approach by simulating an office building located in Cairo - Egypt using weather data file, and using actual weather data logged from a weather station installed on the building itself, and comparing both simulation results. The paper then quantizes the impact of weather data’s accuracy on the total annual energy use by comparing both simulation runs. [less ▲]

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See detailNet Zero Buildings—A Framework for an Integrated Policy in Chile
Piderit, María Beatriz; Franklin, Vivanco; van Moeseke, Geoffrey et al

in Sustainability (2019), 11(5), 1494

The potential of carbon dioxide emissions mitigation in the building sector can be achieved through energy policies, progressive goals, and support systems to attain sustainable constructions that ... [more ▼]

The potential of carbon dioxide emissions mitigation in the building sector can be achieved through energy policies, progressive goals, and support systems to attain sustainable constructions that guarantee the reduction of emissions. Net-Zero Energy Buildings (NZEB) is a concept that allows moving forward to neutralize buildings’ carbon emissions. This has been demonstrated by more industrial countries which have set goals and challenges to progressively approach an energy neutrality balance for buildings. Therefore, the target of this research is to define a framework for a new standard to reach NZEB in Chile. Firstly, an exhaustive review of the energy policies, NZEB definitions, and components of an NZEB system took place. Secondly, focus group discussions with local and international professionals from the building sector were organized to define a vision, opportunities, and potential measures with a focus on policies, to implement and develop local technologies for NZEB buildings in Chile. The study identifies the need to advance public policies to achieve an integrated policy for the implementation of energy neutral concept buildings. Finally, the paper presents a NZEB standard framework, including key performance indicators and suggested performance metrics thresholds. [less ▲]

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See detailEstimate of outdoor thermal comfort zones for different climatic regions of Iran
Roshan, GholamReza; Almomenin, HaniehSaleh; da Silveira Hirashima, Simone Queiroz et al

in Urban Climate (2019), 27

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See detailOccupant-Centered Adaptive Façades Assessment Survey (OCAFAS-15)
Attia, Shady ULiege

Computer development (2019)

The Occupant-Centered Adaptive Façades Assessment Survey (OCAFAS-15) is an instrument with good validity, reliability and high internal consistency in assessing well-being and interaction of occupants in ... [more ▼]

The Occupant-Centered Adaptive Façades Assessment Survey (OCAFAS-15) is an instrument with good validity, reliability and high internal consistency in assessing well-being and interaction of occupants in buildings with adaptive facades. The OCAFAS-15 benefits from its brevity and ease of completion (generally, 12 min or less, including the occupant’s personal information). A statistically valid and reliable instrument for evaluating occupants’ satisfaction provides façade designers and operators with a useful tool for considering what is most important to the occupant, guiding facades design decisions, and conveying to the operators and building owners that the occupants’ well-being and interaction in building with adaptive facades is the facades engineers’ primary consideration. [less ▲]

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See detailIdentification of Sustainable Indicators for Decision-Making on Roof Stacking Construction Method
Amer, Mohamed ULiege; Attia, Shady ULiege

in Sustainable Cities and Society (2019)

Accommodating populations in cities became increasingly a complex task. With the mounting local and global migration seeking better opportunities in cities, the current urban agendas has put forward ... [more ▼]

Accommodating populations in cities became increasingly a complex task. With the mounting local and global migration seeking better opportunities in cities, the current urban agendas has put forward compact cities as a promising solution towards sustainable urban development. Roof stacking is considered an approach towards increasing cities’ density. However, the selection of optimum roof stacking construction method is merely based on subjective evidence based on architects’ or owners requirements. There is an urgent need to identify sustainable indicators for decision making for roof stacking. Therefore, this research aimed to identify the influential criteria behind the selection and decision making on roof stacking methods. An intensive review of literature, individual interview, and pilot surveys have been carried out. A list of 37 sustainable indicators have been identified based on sustainability triple bottom line, i.e. environmental, economic, and social. A questionnaire has been design and distributed to architects and building engineers as active stakeholders. The importance of the identified indicators have been categorized and ranked. The outcomes of this research draws the line to develop a new tool that facilitates the construction of sustainable roofs in European cities. [less ▲]

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See detailAnalysis tool for bioclimatic design strategies in hot humid climates
Attia, Shady ULiege; Lacombe, Théo; Rakotondramiarana, Hery Tiana et al

in Sustainable Cities and Society (2019), 45

Housing projects design in cities should be based on an understanding of the urban local climate; selection of fit-to-purpose thermal comfort models and implementation corresponding design guidelines and ... [more ▼]

Housing projects design in cities should be based on an understanding of the urban local climate; selection of fit-to-purpose thermal comfort models and implementation corresponding design guidelines and best practices. In this context, we developed an analysis tool for bioclimatic design recommendations for architects in Madagascar. The aim of this tool is to support the decision-making process of architects and urban planners by proposing environmental design guidelines for Antananarivo and Toamasina, the two largest cities on the island. Firstly, we performed a climate zoning of the island based on altitude, solar irradiation and dry bulb temperature. Secondly, we developed a bioclimatic analysis based on temperature and humidity levels. The results show that ASHRAE adaptive comfort model is the best model for both cities because it can tolerate higher humidity limits of up to 80% or more. The natural comfort potential varies from 22 in Antananarivo to 45% in Toamasina. Results can be used to create informative bioclimatic analysis visualisations to better assess climate and determine thermal comfort models for other cities in hot-humid climates. The capabilities of the tool allow architects and urban planners to better understand the climate and propose practical design guidance. [less ▲]

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See detailIndoor thermal comfort in residential building stock: A study of RCC houses in Quetta, Pakistan
Mahar, Waqas Ahmed ULiege; Attia, Shady ULiege

Report (2018)

The report is a part of the PhD project entitled “Methodology for the design of climate responsive houses for optimised thermal comfort in Quetta, Pakistan” being carried out at University of Liège ... [more ▼]

The report is a part of the PhD project entitled “Methodology for the design of climate responsive houses for optimised thermal comfort in Quetta, Pakistan” being carried out at University of Liège, Belgium. The aim of the project is to improve indoor thermal comfort of free-running houses in Quetta and raise the awareness of builders about climate sensitivity. The present findings are based on the monitoring of indoor climate, survey questionnaire and the interviews of the residents living in the houses made of reinforced cement concrete (RCC) structure. We aim to provide the readers with insights and perspectives on the existing houses, their comfort performance, comfort perception and understanding of the residents and the use of mechanical methods to optimise thermal comfort in RCC houses in Quetta, Pakistan. [less ▲]

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See detailMethodology for the design of climate responsive houses for optimized thermal comfort in Quetta, Pakistan
Mahar, Waqas Ahmed ULiege; Attia, Shady ULiege

Poster (2018, December 07)

A building must be energy-efficient and provide comfortable indoor environment to the residents. The Building Energy Code of Pakistan (BECP) only focuses on commercial buildings. In today’s scenario a ... [more ▼]

A building must be energy-efficient and provide comfortable indoor environment to the residents. The Building Energy Code of Pakistan (BECP) only focuses on commercial buildings. In today’s scenario a standard must include the context and climate considerations. The aim of this study is to improve indoor thermal comfort of free-running houses in Quetta, Pakistan and raise the awareness of builders about climate sensitivity. [less ▲]

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See detailChallenges and Future Directions of Smart Sensing and Control Technology for Adaptive Facades Monitoring
Attia, Shady ULiege

in Gosztony, Susanne; Luible, Andreas (Eds.) Lucerne University of Applied Sciences and Arts (2018, November 26)

Smart sensors with embedded microprocessors and wireless communication links have the potential to fundamentally change the way dynamic façade systems are monitored, controlled, and maintained. According ... [more ▼]

Smart sensors with embedded microprocessors and wireless communication links have the potential to fundamentally change the way dynamic façade systems are monitored, controlled, and maintained. According to our review presented in this paper the use of networked systems of embedded computers and sensors throughout society could well dwarf all previous milestones in the information revolution and improve the work place experience, user interaction and empower building occupants. However, a framework does not yet exist that can allow the distributed computing and automation paradigm offered by smart sensors to be employed for dynamic facades monitoring and control systems. Such an approach does not scale to user interactions, smart grid interaction and monitoring systems with densely instrumented arrays of sensors that will be required for the next generation of adaptive facades monitoring and control systems. This paper provides a brief introduction on automated control and users’ interaction of smart sensing technology for adaptive facades and identifies some of the opportunities and associated challenges. [less ▲]

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See detailOccupant-Adaptive Façade Interaction: Relationships and Conflicts
Luna-Navarro, Alessandra; Loonen, R.C.G.M; Attia, Shady ULiege et al

in Gosztonyi, Susanne; Luible, Andreas (Eds.) Facade 2018 - Adaptive!, Proceedings of the COST Action TU1403 Adaptive Facades Network Final Conference (2018, November 26)

Adaptive or Intelligent façades are those that can interact with users and dynamically vary their performance or properties (controlling thermal or solar energy, air flow and/or daylight) in response to ... [more ▼]

Adaptive or Intelligent façades are those that can interact with users and dynamically vary their performance or properties (controlling thermal or solar energy, air flow and/or daylight) in response to changing external conditions and indoor demands. Consequently, adaptive façades could help to ensure occupant comfort, health, well-being and satisfaction, while allowing resource-efficient building operation. However, effective adaptive façade solutions that provide an optimal balance between user comfort, satisfaction and energy efficiency cannot be achieved without knowledge of the multidisciplinary complexity of the user-façade interaction. The main objective of this paper is to preliminary review and analyse the existing literature on user interaction with intelligent buildings, especially with façades, and to propose a conceptual framework to capture the multi-disciplinary and multi-domain complexity of user interaction with adaptive façades. The interaction between adaptive façades and occupants is then modelled as a closed loop of information and action exchange. This paper concludes indicating which are the future research needs to be addressed in order to define what is a satisfactory interaction strategy between occupants and façades. [less ▲]

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See detailFacade 2018 - Adaptive!
Luible, Andreas; Gosztonyi, Susanne; Attia, Shady ULiege

Book published by Lucerne University of Applied Sciences and Arts (2018)

Lucerne University of Applied Science and Arts, the European Façade Network and the European research network COST Action TU1403 “Adaptive Facades Network” have joined forces in the organisation of the ... [more ▼]

Lucerne University of Applied Science and Arts, the European Façade Network and the European research network COST Action TU1403 “Adaptive Facades Network” have joined forces in the organisation of the FAÇADE 2018 – Adaptive! Conference. This international scientific conference - held on November 26-27, 2018 at the culture and convention centre Lucerne (KKL), Switzerland – focuses on adaptive, multifunctional and dynamic building envelopes. It gathers excellent architects, engineers, researchers and representatives from the façade industry to discuss recent façade projects, the advances in the design, new adaptive technologies and future developments in research. [less ▲]

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See detailPerformance Evaluation of Adaptive Facades: A case study with electrochromic glazing
Bilir, Senem; Attia, Shady ULiege

in Luible, Andreas; Gosztonyi, Susanne (Eds.) Adaptive Facades (2018, November 26)

Adaptive facades are performance based envelopes that are able to respond dynamically to climatic conditions. One of the recognized adaptive façade technologies is electrochromic glazing. However, very ... [more ▼]

Adaptive facades are performance based envelopes that are able to respond dynamically to climatic conditions. One of the recognized adaptive façade technologies is electrochromic glazing. However, very few studies evaluated the performance of electrochromic glazing on the building level. Therefore, we selected a case study of a certified educational building with a nearly zero energy building performance that includes an electrochromic facade. The overall aim of the research is to understand the performance requirements of electrochromic glazing and its overall contribution to energy saving s and thermal and visual comfort improvement. The performance of the Swiss International School in Dubai was analyzed based on interviews with the design and build team, monitored data and post occupancy evaluation. A systematic process mapping took place to review the performance indicators, simulation tools and team responsibilities during the design, construction and operation stages of the building. The paper identifies the key performance criteria of electrochromic glazing in relation to energy and comfort. Finally, we assess the significance of using electrochromic glazing from a technical point of view and share the learned lessons for architects and facade engineers. [less ▲]

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See detailBuilding energy efficiency policies and practices in Pakistan: A literature review
Mahar, Waqas Ahmed ULiege; Anwar, Naveed Ur Rehman; Attia, Shady ULiege

in Abstract Book (2018, November 15)

The household sector in Pakistan became the largest consumer of electricity which is responsible for more than 51% of the national consumption. The Building Energy Code of Pakistan was developed in 1990 ... [more ▼]

The household sector in Pakistan became the largest consumer of electricity which is responsible for more than 51% of the national consumption. The Building Energy Code of Pakistan was developed in 1990, yet the institutional setup regarding energy efficiency & conservation is inadequate. There is lack of experts and implementation of policies at national and provincial level. The study aims to explore the energy efficiency and conservation policies in Pakistan and their impact on reducing household energy consumption. The issues related to the implementation of policies across the country have been further discussed. The paper provides an overview of the energy sector and its challenges related to residential buildings. Energy policies, standards and literature related to building sector were analysed and discussed with the experts. Moreover, suggestions and recommendations are made for the possible solutions and improvement of the existing situation. [less ▲]

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