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See detailEvaluation of Adaptive Facades: A case study of the Swiss School in Dubai
Bilir, Senem; Attia, Shady ULiege

in Luible, Andreas (Ed.) Adaptive Facades (2018, October)

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

Report (2018)

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 ▲]

Detailed reference viewed: 40 (4 ULiège)
See detailNet Zero Energy Buildings (NZEB): Concepts, Frameworks and Roadmap for Project Analysis and Implementation
Attia, Shady ULiege

Book published by Elsevier (2018)

Net Zero Energy Buildings (NZEB): Concepts, Frameworks and Roadmap for Project Analysis and Implementation the author provide readers elements to understand, combine and contextualize their design ... [more ▼]

Net Zero Energy Buildings (NZEB): Concepts, Frameworks and Roadmap for Project Analysis and Implementation the author provide readers elements to understand, combine and contextualize their design decisions on Net Zero Energy Buildings. The book is based on learned lessons from NZEB design, construction, operation and integrating the most relevant topics such as Multidisciplinarity, Climate Sensitivity, Comfort requirements, Carbon footprint, Technology, Construction Quality, and Evidence Based Design. Chapter one introduces the context of high performance buildings, chapter two overviews the definition of NZEB, chapter tree covers the performance thresholds for efficient buildings, chapter four covers the design process and its tools, chapter five covers comfort and indoor environmental quality, chapter six covers materials, chapter seven covers systems and building automation, chapter eight covers micro-grid and smart grid, chapter nine discusses construction quality, chapter ten discusses performance monitoring and post occupancy evaluation, chapter eleven brings case studies and the final chapter covers NZEB Roadmap and tools. Professionals in the Architecture, Engineering and Construction industries will benefit of the definitions of the fundamental concepts of the area as well as from the practical approach to evaluating energy efficient building projects. Researchers and students in the area will find particularly interesting the worldwide case studies and articulation of concepts into an evaluation framework. [less ▲]

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See detailRegenerative and Positive Impact Architecture: Learning from Case Studies
Attia, Shady ULiege

Book published by Springer International Publishing (2018)

Regenerative design holds great promise for a new era of sustainable and positive impact architecture, sparking considerable interest among architects, building professionals and their clients. Until now ... [more ▼]

Regenerative design holds great promise for a new era of sustainable and positive impact architecture, sparking considerable interest among architects, building professionals and their clients. Until now there are no green buildings with an overall positive impact on environment and health. In this regard, the professional and scientific potential of regenerative architecture can only be fully realized by the setting a design framework that guides designers during projects design, construction and operation. This book introduces readers to key concepts of circularity in the built environment, highlight best practices, introduce opportunities to create value learn from real cutting edge case studies. In this book, we present a novel framework for regenerative building design that can be applied to future constructions based on professional expertise and exposure, towards healthy, resource efficient and green buildings in the AEC industry. We compare four state of the art buildings to address the critical principles, strategies and steps in the transition from the negative impact reduction architecture to the positive impact regenerative architecture, utilizing life cycle analysis. The case studies analysis and comparison can serve as an inspiring eye opener and provide a vision for architects and building professionals in the fields of high performance buildings, resource centered thinking and regenerative architecture. [less ▲]

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See detailA Methodology to Determine the Potential of Urban Densification through Roof Stacking
Amer, Mohamed ULiege; Mustafa, Ahmed; Teller, Jacques ULiege et al

in Sustainable Cities and Society (2017), 35

Facing the need to accommodate a growing number of inhabitants in major European cities, this research aimed to establish a methodology that facilitates decision making on urban densification through roof ... [more ▼]

Facing the need to accommodate a growing number of inhabitants in major European cities, this research aimed to establish a methodology that facilitates decision making on urban densification through roof stacking. The methodology adopts a systematic approach on three consecutive levels: urban, engineering, and social. Multiple criteria are identified to assess and map the roof stacking potential in terms of location and number of added floors. The Brussels Capital Region was chosen as a case study to experiment with the developed workflow chart and validate the proposed approach, using ArcGIS software, by creating a map of the urban densification potential through roof stacking of Brussels at the city scale. The results show a realistic potential of accommodating 30% of the expected population increase in Brussels by the year 2040 using only roof stacking, provided that the current urban regulations are respected. In addition, a theoretical potential to accommodate more than the expected population increase by the same year is proposed provided that urban planning regulations are relaxed in relation to the height of buildings. Further applications to other cities in Europe would help create additional opportunities to develop an automated tool for estimating such potentials on a wider scope. [less ▲]

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See detailOverview and future challenges of nearly Zero Energy Buildings (nZEB) design in Southern Europe
Attia, Shady ULiege; Polyvios, Eleftheriou; Xeni, Flouris et al

in Energy and Buildings (2017), 155

In times of great transition of the European construction sector to energy efficient and nearly zero energy buildings (nZEB), a market observation containing qualitative and quantitative indications ... [more ▼]

In times of great transition of the European construction sector to energy efficient and nearly zero energy buildings (nZEB), a market observation containing qualitative and quantitative indications should help to fill out some of the current gaps concerning the EU 2020 carbon targets. Next to the economic challenges, there are equally important factors that hinder renovating the existing residential building stock and adding newly constructed high performance buildings. Under these circumstances this paper summarises the findings of a cross-comparative study of the societal and technical barriers of nZEB implementation in 7 Southern European countries. The study analyses the present situation and provides an overview on future prospects for nZEB in Southern Europe. The result presents an overview of challenges and provides recommendations based on available empirical evidence to further lower those barriers in the European construction sector. The paper finds that the most Southern European countries are poorly prepared for nZEB implementation and especially to the challenge/opportunity of retrofitting existing buildings. Creating a common approach to further develop nZEB targets, concepts and definitions in synergy with the climatic, societal and technical state of progress in Southern Europe is essential. The paper provides recommendations for actions to shift the identified gaps into opportunities for future development of climate adaptive high performance buildings. [less ▲]

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See detailResource efficiency and circularity in engineering higher education
Attia, Shady ULiege

in Moula, Munjur; Pekka, Oinas; Jaana, Sorvari (Eds.) et al Constructing A Green Circular Society (2017)

Changing engineering student’s knowledge, skills and attitudes about resource efficiency, regenerative design and circularity in the built environment is a serious challenge. The development of ... [more ▼]

Changing engineering student’s knowledge, skills and attitudes about resource efficiency, regenerative design and circularity in the built environment is a serious challenge. The development of engineering students’ capabilities to design within a circular economy paradigm in higher education can foster sustainable behaviour and contribute to the global sustainable development global agenda. This chapter presents the experience of introducing the concept of regenerative design within a project oriented design studio for undergraduates. The regenerative design objective and principles are used a method to develop engineers capabilities to design within a circular economy paradigm. The aim of the study is to evaluate the adoption of circular economy principles and their influence on the decision making and final outcomes. A state of the art provides an over view on the similar approaches to incorporate sustainability into university courses and curricula with a focus out case study to make a step forward. The chapter describes a thorough evaluation of the course and report the outcomes in the form of projects evaluation and students’ feedback, interviews and surveys, in order to assess the students’ knowledge uptake, learned skills and design capabilities. Students completed a knowledge, skills, and attitudes questionnaire before the curriculum, after the final learning experience, and one year later. This chapter provides insights into the effectiveness of introducing circularity in an engineering course. Based on the lessons learned from our case study we provide a discussion on the main challenges such as complexity, decision making uncertainty and interdisciplinarity, institutional reforms in engineering higher education. Finally, the chapter presents a range of tangible and realistic recommendations to better incorporate resource efficiency and circularity in engineering higher education. [less ▲]

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See detailTwenty-year tracking of lighting savings and power density in the residential sector
Attia, Shady ULiege; Hamdy, Mohamed; Ezzeldin, Sherif

in Energy and Buildings (2017), 154

Lighting energy consumption represents a significant percentage of total energy consumption in residential building sector. During the last 20 years, advanced energy-efficient lighting fixtures have been ... [more ▼]

Lighting energy consumption represents a significant percentage of total energy consumption in residential building sector. During the last 20 years, advanced energy-efficient lighting fixtures have been introduced worldwide to conserve the energy consumption in residences. In the Middle East and North Africa (MENA) region, very few studies have been conducted to evaluate the association between the introduced lighting fixtures and the resulted energy savings using valid measurements and verification techniques. This study evaluates the techno-economic impact of replacing new energy efficient lighting in residences in Egypt (a representative MENA region country). A quantitative analysis is applied by tracking the utility bills of 150 residential apartments in Cairo. The average measured power consumption before (1993-1998) and after (2009-2014) installation energy efficient lighting fixtures is analyzed. A building performance simulation model is developed to back the findings. The findings indicate a significant disparity between the estimated savings based on simulation and the real measured savings due to penetration, rebound effect and low quality lamps. Moreover, the findings present an example of quantified benefits of energy efficient lighting, which is very important to inform the decision making of public policy makers, investors and building occupants. [less ▲]

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See detailEvaluation of adaptive facades: The case study of Al Bahr Towers in the UAE
Attia, Shady ULiege

in Shaping Qatar’s Sustainable Built Environment (2017), 2(6), 1-13

The assessment of adaptive facades presents a barrier as there is no established assessment technique. Many of the available facade performance evaluation systems or frameworks have limited applicability ... [more ▼]

The assessment of adaptive facades presents a barrier as there is no established assessment technique. Many of the available facade performance evaluation systems or frameworks have limited applicability for such advanced building facades. The complexity of adaptive or dynamic facades’ evaluation is related to the performance evaluation of facade elements, systems, and overall building performance coupled with occupant behavior and occupant satisfaction. In this context, this paper presents a case study of an adaptive sunscreen facade and evaluation of its performance and occupant behavior. The evaluation mainly focuses on pre- and post-construction phases of adaptive facades: the design assist phase (including the durability test, visual mockup, onsite mashrabiya mounting, and weather stripping), the commissioning phase (field verification and performance testing), and the monitoring phase. The selected project is a 150-meter-high twin tower that stands with a honeycombinspired structure and automated dynamic solar screen that responds to the sun’s movement. These solar screens respond dynamically and automatically to the angle of the sun, which improves the control over energy consumption, solar radiation, and glare with the ability to allow natural light into the building. This paper is part of the research activities of working group 3 of the European COST Action 1403 on “Adaptive Facades”. Different methods were used for evaluation and these include the following: interviews with the architect, facade engineer, technical control specialist and occupants, reviews of standards and codes, review of energy models, and a systematic design process mapping. A documentation of the case study describing the post-construction occupant comfort and facade operation was prepared. This paper’s audience comprises mainly project managers, architects, and building facade engineers together with facility managers who are concerned with the process of design, construction, and operation of adaptive sunscreens facades. The outcome of this study identifies quantifiable performance indicators and effective strategies for the design and performance evaluation of optimal adaptive facades. [less ▲]

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See detailImpact of Financial Assumptions on the Cost Optimality towards Nearly Zero Energy Buildings- A case study
Hamdy, Mohamed; Siren, Kai; Attia, Shady ULiege

in Energy and Buildings (2017), 153

The energy efficiency challenge in Europe is mainly concerned with existing buildings and the investment scenarios to implement deep renovations. The cost-optimal approach imposed on EU-Member states by ... [more ▼]

The energy efficiency challenge in Europe is mainly concerned with existing buildings and the investment scenarios to implement deep renovations. The cost-optimal approach imposed on EU-Member states by the European Energy Performance of Buildings Directive aims to identify the investment gap and challenges to transform existing buildings into nearly Zero Energy Buildings (nZEBs). The investment gap is function of several volatile financial parameters including discount rate (r), developing of energy price (e), decline rate of technology price (d), as well as nZEB’s incentives like feed-in-tariff (FiT) and investment grant (iG). In this context, the decision making process of individuals or investment institutions is hindered by complexity and uncertainty. In order to assist the decision making process and improve the visibility of financial energy benefits, a novel optimization-based parametric analysis scheme (OptnZEB-I) is developed. The scheme is designed to investigate a large number of economic scenarios (i.e., combinations of financial assumptions) in a short computational time while a holistic optimization approach is adopting for exploring all possible design options including energy conservation measures (ESMs); renewable energy sources (RETs) and mechanical systems (Sys). For demonstration, the scheme is applied to analyse the impact of several financial parameters on the cost-optimal energy performance level (CO-EPL) of a single family house in Finland. In line with the EU-directive, a large number of possible design options (∼3 × 109million) are optimized for 4608 cases of economic scenarios. The results of the address case study show that, in average, the CO-EPL ranges from 90 to 160 [kWh/m2]. The range has most frequent value of 145 kWh/m2. The CO-EPL is significantly sensitive to the e, f, then i, respectively. Less sensitivity is found to the other financial parameters. The robustness of the optimization results are verified by solving the addressed design problem by using four different optimization algorithms (i.e., pattern search, interior-point, simulated annealing and genetic algorithms). [less ▲]

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See detailBenchmarking the Environmental Impact of Green and Traditional Masonry Wall Constructions
Gauvreau-Lemelin, Corinne; Attia, Shady ULiege

in Brotas, Luisa; Roaf, Susan; Fergus, Nicol (Eds.) Passive low energy architecture design to thrive (2017, July 03)

In Belgium, the most common approach for nearly Zero Energy Buildings is to comply with the locally modified version of the German Passive House (PH) Standard that requires a very low conductivity of ... [more ▼]

In Belgium, the most common approach for nearly Zero Energy Buildings is to comply with the locally modified version of the German Passive House (PH) Standard that requires a very low conductivity of exterior walls. The conventional PH brick constructions are dominated by building materials with high environmental impact including concrete blocks, firebrick and petrochemical insulation materials that produce a great amount of greenhouse gases (GHG). Moreover, there are very few studies that assessed the holistic environmental impact of conventional wall compositions against ecological wall compositions. Therefore, this research compares a traditional Belgian representative wall against a hemp block wall, according to the PH standard. The environmental impact of each wall is quantified through a life cycle assessment. The final results indicate that the hemp wall reinforced with a wood skeleton has a much lower impact on the environment: up to 60% reduction on total primary energy, 72% on climate changes, 93% on eutrophication, 61 % on ozone layer depletion and 74% on acidification. Future work may refine the assessment process. The study provides novel and significant findings that can inform building owners, architects and contractors and encourage them to choose environmentally friendly masonry wall compositions. [less ▲]

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See detailROOF STACKING: Learned Lessons from Architects
Amer, Mohamed ULiege; Attia, Shady ULiege

Report (2017)

Roof Stacking represents an approach to accommodate increasing population in the major cities around Europe, new agendas for urban densification emerge in response of finding sustainable solutions to use ... [more ▼]

Roof Stacking represents an approach to accommodate increasing population in the major cities around Europe, new agendas for urban densification emerge in response of finding sustainable solutions to use existing urban infrastructure in the most efficient ways. Several methods for urban densification are being proposed and seen in real life. One of those methods is roof stacking, which is defined as the added structure over the rooftop of an existing building to create one or more stories of living spaces. This report represents the results of conducted investigation on roof stacking method as a sustainable approach for urban densification. The aim of this report is to present a guideline for roof stacking construction approaches and methods and present the learned lessons through interviewing notable architects from different European countries who applied roof stacking. This report identifies the challenges and opportunities when applying roof stacking in addition to proposing recommended solution for the different obstacles that are faced when adding extensions on the rooftops. [less ▲]

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See detailDefining thermal comfort boundaries for heating and cooling demand estimation in Iran's urban settlements
Roshan, GhR.; Farrokhzad, M.; Attia, Shady ULiege

in Building & Environment (2017), 121

Iran has diverse climate variability, comfort boundaries for each geographic region must be defined in order to present current architectural design recommendations and proper mechanical systems design to ... [more ▼]

Iran has diverse climate variability, comfort boundaries for each geographic region must be defined in order to present current architectural design recommendations and proper mechanical systems design to meet building's heating and cooling energy demand. Therefore, two components of the temperature and relative humidity of 148 stations with the longest common statistical period of twenty years (1994–2014), which have been in daily scale were selected to calibrate and redefine the thermal boundary conditions in Iran. Givoni chart was used to define and visualize the bioclimatic conditions in buildings. The results of this study indicate that only 18% of the 148 stations days, falls in the thermal comfort bioclimatic conditions. After calibration of the base comfort temperature, we found that the upper threshold of this component varies from at least 22.62 °C for Ardebil to 25.94 °C for Dorudzan station and the low threshold of this component belongs to Ardebil with at least 20.13 °C up to its maximum value with 22 °C which belongs to Dorudzan. Spatial distribution of cooling and heating days show that their maximum threshold has been for cores in Northeastern half of Iran, Iran's Western half and some Central parts of Iran and the minimum threshold of these two components belongs to the beaches of north and south of the country. The findings present updated thermal comfort boundaries that can be used by architects, engineers and policy makers to achieve, in turn, more energy efficient homes and high quality indoor and outdoor living environments. [less ▲]

Detailed reference viewed: 61 (10 ULiège)
See detailYearbook 2016 Ateliers d'Architecture III: Logement collectif durable et conception régénérative
Attia, Shady ULiege

Book published by SBD Lab (2017)

Regarder aujourd'hui les défis pour la planification et la conception de l'environnement bâti durable, y compris les émissions de carbone, les changements climatiques, la santé humaine, les problèmes d ... [more ▼]

Regarder aujourd'hui les défis pour la planification et la conception de l'environnement bâti durable, y compris les émissions de carbone, les changements climatiques, la santé humaine, les problèmes d'eau, la biodiversité, la pénurie de ressources, l'épuisement des combustibles fossiles, la croissance démographique et l'urbanisation; L'architecture durable jouera un rôle clé pour le développement durable de la société dans son ensemble. Dans le cadre d'un studio de design architectural, ce livre présente l'expérience de l'introduction de la conception régénératrice au sein de la faculté d'ingénierie. Le cadre et les principes de conception régénératifs sont utilisés comme méthode pour développer les capacités des ingénieurs civils architecte à concevoir dans un paradigme d'économie circulaire et la construction d'impact positif. L'objectif de l'étude est d'évaluer l'adoption des principes de l'économie circulaire et leur influence sur la prise de décision et les résultats finaux sur les étudiants en 'architecture à l'Université de Liège. Le livre présente le design et les résultats de studio sous la forme de projets visant à évaluer l'adoption des connaissances des élèves, les compétences acquises et les capacités de conception. Le livre fournit des résultats qui peuvent servir d'ouvreur inspirant et fournir une vision pour les architectes et les professionnels de la construction qui mettent en lumière les opportunités, les défis et les ingénieurs d’architecte doivent s'engager dans un environnement construit circulaire. [less ▲]

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See detail4th Doctoral Seminar on Sustainability Research in the Built Environment Book of Abstracts
Attia, Shady ULiege; Teller, Jacques ULiege; Mahy, Grégory ULiege

Book published by SBD Lab (2017)

The DS2BE is a joint initiative of research groups working on sustainability issues at 8 Belgian universities: ULBruxelles, VUBrussel, KULeuven, UCLouvain, ULiège, UHasselt, UAntwerpen and UGent ... [more ▼]

The DS2BE is a joint initiative of research groups working on sustainability issues at 8 Belgian universities: ULBruxelles, VUBrussel, KULeuven, UCLouvain, ULiège, UHasselt, UAntwerpen and UGent. Conceived as a platform for PhD researchers whose work engages the built environment at different scales in the framework of sustainability, these seminars provide an excellent opportunity for the doctoral students of the partner institutions to present their ongoing research. They will get feedback from a broad panel of sustainability experts, including invited specialists and peers, for furthering their research. PhD candidates can provide submissions that concern topics, such as: - Sustainable Architecture and Resources, materials, re-cycling /re-use, building elements and envelope, building physics, building construction technology, building renovation, drawing lessons from vernacular, bioclimatic design, regenerative design, biomimetic and integrated design, …, - Sustainability theory, sustainability / environmental assessment at building and neighborhood scales, and at the scale of city and regions, - Sustainable urbanism, urban form, landscape and urban ecology, urban green infrastructure and ecosystem services, public space, density, urban infrastructure & transportation, water urbanism, retrofitting of buildings to the built environment, - Methodologically oriented PhDs focusing on issues related to LCA (Life Cycle Analysis), I-O (Input-Output Analysis), MFA (Material Flow Analysis), simulation techniques, to exploring urban metabolism, industrial ecology, environmental modelling, GIS-based land-use change modelling, to Research by Design. [less ▲]

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See detailThermal comfort models for net zero energy buildings in hot climates
Belkhouane, Hamza ULiege; Hensen, Jan; Attia, Shady ULiege

in Second International Conference on Energy and Indoor Environment for Hot Climates (2017, February 26)

Several energy efficiency concepts and comfort models emerged in the last 15 years seeking high performance buildings and optimal occupant comfort conditions. The aim of high performance buildings is to ... [more ▼]

Several energy efficiency concepts and comfort models emerged in the last 15 years seeking high performance buildings and optimal occupant comfort conditions. The aim of high performance buildings is to reduce the carbon footprint and energy consumption of buildings while maintain a fit to purpose comfort. In this context, this work raises the question of fir to purpose comfort models that can from one side reduce the energy consumption of typical office buildings in hot climates (cooling dominated) while on the other side ensuring indoor thermal comfort. Indeed, studies that address energy efficiency are many, however it is in most cases applied to temperate or cold climates and barely explored for hot climates. The objective of this paper is to (1) combine several comfort models for a net zero energy building in hot climates, (2) select the comfort model that shows the optimal comfort quality of indoor environment and (3) compare the building's annual energy consumption for each used comfort model. To respond to our research problems, a methodology has been established, which goes through several phases. First identifying the different comfort models comfortable to use in hot climates (ISO 7730 / EN 15251 / adaptive ASHRAE / Givoni), secondly selecting a typical validated office building model as a reference building and finally selecting representative cities in the Mediterranean arid and hot climate (Algiers / Sicily / Cairo / Dubai). The study used building performance simulation to generate the different results on the energy consumption and the operative temperatures of the different models of comfort in each city. The paper ultimately identifies the fit to purpose comfort models for a medium size net zero energy office building in hot climates. The paper presents a comparison that can help building professional to identify the most appropriate comfort model that allows optimizing energy consumption, ensuring thermal comfort for robust perfromnce of net zero energy buildings in hot climates. [less ▲]

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See detailEnergy Efficiency in the Romanian Residential Building Stock: A Literature Review
Muresan, Adina Ana; Attia, Shady ULiege

in Renewable and Sustainable Energy Reviews (2017), 74

The building sector in Romania is dominated by residential buildings that are old and have poor thermal performance. As member of the European Union, Romania has to reach the objectives imposed by the ... [more ▼]

The building sector in Romania is dominated by residential buildings that are old and have poor thermal performance. As member of the European Union, Romania has to reach the objectives imposed by the Directive 2009/28/EC and to fulfill the requirements of the Energy Performance of Buildings Directive (EPBD) by year 2020. To reach the 2020 objectives, the old buildings from the Romanian building stock should be rehabilitated and the new buildings should be designed according to the latest thermal performance characteristics. The following paper presents the literature review of building energy performance in Romania. The purpose of the literature review analysis is to provide an overview on current building energy efficiency in Romania. The paper also presents future perspectives on implementation of high performance buildings such as the Passive House (PH), nearly Zero Energy Buildings (nZEB) and Net Zero Energy Buildings (NZEB). The reviewed publications and case studies are classified under three categories: policy and regulations, technology and feasibility. Finally, the paper presents a holistic perspective on the Strength, Weakness, Opportunities and Threats (SWOTs) of energy efficiency in Romania's residential building sector. [less ▲]

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See detailBest Practices for NZEB design in Mixed & Cooling Dominated Climates
Attia, Shady ULiege

in HARPUTLUGİL, Timuçin (Ed.) Symposium for Improving Energy Efficiency in Buildings Project (2017, February 14)

High performance buildings including net zero energy buildings (NZEB) are facing difficulty to become market mainstream in warm and hot climates. Beside the economic there are serious technical and design ... [more ▼]

High performance buildings including net zero energy buildings (NZEB) are facing difficulty to become market mainstream in warm and hot climates. Beside the economic there are serious technical and design challenges that hampers design teams design, construct and operate NZEB in mixed and cooling dominated climates. There is a difficulty to make the Passive House standard cross the heating dominated climatic zones in Northern and Central Europe to get implemented in mixed or cooling dominated climates as an ultra-energy efficient building concept. There is a need for setting new climate adaptive energy efficiency target metrics for NZEBs in warm and hot climates. This paper presents guidance and recommendations on the necessary performance target metrics for NZEBs and makes them explicit. Results are based on cross analysis of several case studies, presenting an overview of challenges and providing recommendations based on available empirical evidence to further lower those barriers Worldwide with a focus on the European construction sector. By defining the performance thresholds for NZEBs including the metrics we offer design team the possibility of verification and design assessment during early design decision making phases to instil a kind of practical, evidence based and quantifiable guidance for high performance buildings and in particular NZEBs. [less ▲]

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See detailEvaluation of adaptive facades: Case study, Al Bahar Towers, UAE
Attia, Shady ULiege

in Amato, Alex (Ed.) TOGETHER LET’S BUILD A SUSTAINABLE FUTURE (2016, November 13)

The assessment of adaptive facades presents a barrier in light of the fact that there is no settled assessment technique se to systematically reach this goal. Many of the available façade performance ... [more ▼]

The assessment of adaptive facades presents a barrier in light of the fact that there is no settled assessment technique se to systematically reach this goal. Many of the available façade performance evaluation systems or frameworks have restricted applicability for such advanced building facades. The complexity of adaptive or dynamic facades evaluation is related to the performance evaluation of façade elements, systems and overall building performance coupled to occupant behavior and occupant satisfaction. In this context, we present\s a case study for an adaptive sunscreens façade and evaluate its performance and occupant behavior. The evaluation focuses mainly on pre and post construction phase of adaptive facades: The design assist phase (including the durability test, visual mockup, onsite mashrabiya mounting and weather stripping), the commissioning phase (field verification and performance testing) and the monitoring phase. The selected project is a 150 meters high twin tower that stands with honey-comb inspired structure and automated dynamic solar screen that responds to the sun’s movement. These solar screens respond dynamically and automatically to the angle of the sun which improves the control over energy consumption, solar radiation and glare with the ability to admit natural light into the building. The paper is part of the research activities of working group 3 of the European COST Action 1403 on “Adaptive Facades “. Different methods were used for evaluation, this include: interviews with the architect and façade engineer and technical control specialist, occupants, reviews of standard and codes, review of energy models and a systematic design process mapping. A documentation of the case study describing the post construction occupant comfort, and façade operation was prepared. This paper’s audience is mainly project managers, architects, building façade engineers together with facility managers concerned with the process of design, construction and operation of adaptive sunscreens facades. The outcome of this study identifies quantifiable performance indicators and effective strategies for the design and performance evaluation of optimal adaptive facades. [less ▲]

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See detailLife Cycle Costing for a Near Zero Energy Building in Jordan: Initial Study
Attia, Shady ULiege; Al-Khuraissat, Maysoon

in The 5th Architectural Jordanian International Conference (2016, November 01)

Green Building movement has grown in Jordan for the last 10 year for environmental and financial reasons directly related to energy consumption and cost. Despite the few success stories, green design and ... [more ▼]

Green Building movement has grown in Jordan for the last 10 year for environmental and financial reasons directly related to energy consumption and cost. Despite the few success stories, green design and green buildings are not yet the norm in the building sector in the country. One main concern for design engineers as well as investors and building owners is the extra cost green building will bring compared to traditional one. This assumption is wrong since a building cost should be analyzed through its life cycle, which not only include design and construction but also operation and maintenance costs as well. Since issuing the Renewable Energy and Energy Efficiency Law No. 13 of 2012, Jordan opened a new era in the RE and EE, a changing point directly related to this law is the ability to sell electricity production to electricity companies and not only being consumers. The building sector is a direct winner if designers and engineers make right decisions. An ambitious but possible goal is to design and build Net Zero Buildings, which are buildings that produce energy as much as they consume. The aim of this paper is to provide real life cost-effective building strategies and design scenarios that will lead to a successful near Zero Energy Building in Jordan. The paper will use a representative residential apartment in the city of Amman (135- 155 m2) as the base case for the study. The design will be upgraded to include main green building strategies recommended for the climatic zone, provide loads for required systems, and test them all against performance and cost. Design scenarios will be tested and refined tell reach the best design formula that will be both functional and cost effective. The paper will provide a list of recommendations for best economically feasible design solutions and system selections that can lead to a near Zero Energy Building in Jordan for residential apartments. [less ▲]

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