Shady Attia 沙帝 阿提亚

University of Liège | ulg · Urban and Environmental Engineering

This study aimed to explore the microclimate and outdoor thermal comfort characteristics of pedestrian spaces in mountain cities under humid and cold conditions. It focused on rainy and cloudy winter days in a typical mountain city (Chongqing), employing a combination of onsite thermal environment measurements and survey questionnaires. The researc...

According to the European Environment Agency, 85-95 % of today's buildings will still be standing in 2050. As a result, there is an urgent need to renovate existing buildings to reduce energy consumption and improve their energy performance. The use of double-skin façades (DSFs) integrated with active solar systems is a promising solution for energ...

This study investigates the impact of different space utilization on energy use intensity, heating load, cooling load, and thermal comfort of occupants using a combination of empirical data gathering and simulation-based studies. The increasing worldwide preoccupation with energy consumption and environmental sustainability has led to increased att...

Energy conservation measures (ECMs) are often chosen for their immediate benefits, such as suitability to past/current climate conditions and rapid economic returns. However, the longevity of these ECMs poses a risk of becoming outdated or ineffective as climate change alters the very climatic parameters they were designed for. This paper provides...

Circular economy opportunities occur at every building life cycle stage. The consistent evaluation of the disassembly potential of buildings at different scales supports the decision-making for the sustainability of construction works. The main limitation in this field is the fragmentation and dispersion of criteria and methods for circular constru...

In 2019, the building sector was accountable for emitting 12GtCO2, equivalent to 21% of global GHG emissions. To achieve carbon neutrality by 2050, the building sector must change its pace. One of the ways to achieve this goal is through the installation of dynamic solar shadings in buildings. This study focuses on a single office in two locations...

Assisted living facilities with optimal summer thermal comfort are necessary to ensure improved quality of life for the older individuals in warming climates. Older individuals are exposed to higher mortality risks during periods of excessive heat. This study aims to identify and optimize key design variables for a passive house certified assisted...

Purpose This study aims to develop a methodology that extracts an architectural concept from a biological analogy that integrates forms and kinetic behavior to identify whether complex forms work better or simple forms with proper kinetic behavior for improving visual comfort and daylight performance. Design/methodology/approach The research emplo...

Despite extensive energy renovation policies implemented across Europe, the tangible improvement in housing energy performance remains slow, particularly evident in Wallonia, Belgium, used as a case study. Identified challenges include mismatches between existing renovation support mechanisms and target demographics, as well as discrepancies betwee...

Alteration of Indoor Air Quality (IAQ) levels in the context of changing climate is correlated with shifting air pollutant emissions, variations in ambient climate, and the mitigation/adaptation strategies applied in buildings to deal with increasing extreme weather events and energy demands. In this study, firstly, a systematic modeling-based fram...

As heat waves increase in intensity and duration, the risk of heat exposure in dwellings in countries with mixed humid climates is expected to rise. The impact of heat waves on building performance has been extensively researched. However, building performance during concurrent heat waves and power outages needs further investigation to reduce the...

The Urban Heat Island (UHI) effect, exacerbated by urban expansion and climate change, presents significant challenges for sustainable urban development, public health, and environmental resilience. This comprehensive literature review aims to classify and analyze the various methodologies, tools, and models used to assess and mitigate UHI effects....

COST Action CA20139-Holistic design of taller timber buildings (HELEN) COST Action CA20139-Holistic Design of Taller Timber buildings (HELEN)-organized its 2 nd Training School that took place in Zagreb, Croatia, from the 19th to the 21st of June 2024. The HELEN Action Training School represents an important endeavor that promises to reshape how in...

Increasing land surface temperature (LST) and urban heat island intensity (UHII) have been reported to be closely associated with a large number of environmental issues. Understanding LST and UHII rise in cities during heatwaves is crucial for implementing mitigation measures. This paper aims to explain these variations in response to LST and UHII...

Architects and engineers who seek design decision aid for sustainable building and city design frequently experience decisional conflict and require support across the design process. Building performance simulations have become central to supporting the design process, but little is known about the fit and usability of simulation tools and the fac...

As part of the DynamicRenowave project on life cycle assessment and energy simulation of building renovation strategies activities, a new modeling framework has been created. Two objectives were set first to define a common modeling approach to assess operational GHG emissions in buildings. Secondly, define a standard life cycle assessment approach...

The problems of earth construction uptake as a building technology in the Global South have long been recognized. The classic response to the low uptake has been newer compositions of construction earth blocks and biobased materials in one form or another. Nevertheless, the profession’s modern origins of earth construction stem from responses to th...

In areas with a deep floor plan, the distribution of natural light is not uniform. Consequently, relying solely on daylight may not suffice to meet the space's lighting requirements, necessitating the use of artificial lighting in darker areas. Therefore, a lighting system is needed that not only controls the glare near the windows but also increas...

19 The comfort sensation of pedestrians outdoors greatly impacts residents' happiness and standard of living. With 20 the Earth's temperature expected to rise due to global warming, people's outdoor activities will be limited. Therefore, 21 it's essential to intensify the evaluation of the effects of heat reduction strategies on outdoor thermal com...

Climatic classification is essential for evaluating climate parameters that allow sustainable urban planning and resource management in countries with difficult access to meteorological information. Clustering methods are on trend to identify climate zoning; however, for microclimate, it is necessary to apply a double clustering technique to reduce...

The Eastern Mediterranean and Middle East (EMME) region hosts some of the world’s most influential and troubled cities. It is also a hotspot of climate change and socio-economic and political turbulence, which inflate the already flammable conditions and reinforce existing local vulnerabilities. Some of the most arduous challenges of cities relate...

Changing climate intensifies heat stress, resulting in a greater risk of workplace productivity decline in timber office buildings with low internal thermal mass. The impact of climate change induced heat exposure on indoor workplace productivity in timber office buildings has not been extensively researched. Therefore, further investigation to red...

In office buildings, an efficient design of windows and using light shelves as a passive design strategy significantly influence the thermal and visual comfort of occupants while enhancing the productivity and health of users. This study proposes a multi-objective optimization for the optimal design of windows and light shelves in office buildings...

We present unprecedented datasets of current and future projected weather files for building simulations in 15 major cities distributed across 10 climate zones worldwide. The datasets include ambient air temperature, relative humidity, atmospheric pressure, direct and diffuse solar irradiance, and wind speed at hourly resolution, which are essentia...

We present unprecedented datasets of current and future projected weather files for building simulations in 15 major cities distributed across 10 climate zones worldwide. The datasets include ambient air temperature, relative humidity, atmospheric pressure, direct and diffuse solar irradiance, and wind speed at hourly resolution, which are essentia...

The number of desk workers who frequently conduct their jobs at home has increased dramatically during Covid-19. Work-from-home flexibility makes it attractive for workers and companies, resulting in a “Work-Style Reform” after the Covid-19 pandemic. However, the quick conversion of home spaces into workplaces cannot always sufficiently respond to...

Purpose Existing life cycle assessment (LCA) methods for buildings often overlook the benefits of product recovery potential, whether for future reuse or repurposing. This oversight arises from the limited scope of such methods, which often ignore the complex interdependencies between building products. The present paper, backed by its supplementar...

With climate change, the indoor built environment is expected to influence the occupant's safety and wellbeing significantly. A novel multi-criteria thermal resilience certification scheme for indoor built environments during extreme heat events is proposed in this paper. The certification scheme considers overheating, thermal comfort, heat stress,...

In areas with a deep floor plan, the distribution of natural light is not uniform. Consequently, relying solely on daylight may not suffice to meet the space's lighting requirements, necessitating the use of artificial lighting in darker areas. Therefore, a lighting system is needed that not only controls the glare near the windows but also increas...

The greenhouse enables to promotion of plant yield through creating an optimal environment. Efficient solar energy conversion and storage is a promising strategy to address the energy shortage issue of greenhouses in winter. This paper prepares form-stable composite phase change materials (PCMs) to store solar energy efficiently. Lightweight and po...

This IEA Annex 80 Subtask C report and the associated brochures provide examples of well-documented field studies. These field studies apply resilient cooling technologies to reduce energy demand and carbon emissions for cooling and reduce the overheating risk in different types of buildings, including newly constructed and existing buildings. Exam...

Within Annex 80, there is a manifold need to use key performance indicators (KPI, i.e. performance met rics). This is relevant to all Subtasks. The “Task Group KPI” is established to coordinate and clarify the KPIs, used within Annex 80. The Task Group shall collect and coordinate KPIs, relevant to Resilient Cool ing. It shall develop and constantl...

This work addresses the development of compressed earth blocks with high quality using stabilizers and reinforcements of industrial and agroindustrial by-products. A critique of the production of compressed earth blocks using new mixtures, compositions, and characteristics required for adequate performance according to different construction standa...

Proper planning of urban environments in construction projects requires an accurate understanding of the prevailing climates in an area. However, the need for sufficient climate records in the Global South countries can make this characterization difficult. This study proposes using satellite information and cluster analysis to define the climatic...

Phase change material (PCM) featured with high latent heat thermal energy storage capacity and isothermal phase transition is employed in building walls decorated with radiative cooling (RC) coating, to modify the cooling effect on building thermal performance. Numerical analysis indicates that the RC coating causes the exterior temperature of P-RC...

This paper presents the issue of the vertical extension of buildings, mainly residential, as an element of sustainable housing policy of European cities. This type of construction project allows for the acquisition of additional residential space, using the existing technical infrastructure, and also not deepening the effect of urban sprawl. Vertic...

With climate change, Belgium is experiencing and will experience more frequent and severe heat waves, which are particularly difficult to withstand in cities due to the urban heat island effect. In this study, we investigate the evolution of heatwaves in Brussels since 1981 and in the future, up to 2100, using climate simulations from global models...

Research on the temporal and spatial changes of the urban heat island effect can help us better understand how urbanization, climate change, and the environment are interconnected. This study uses a spatiotemporal analysis method that couples the Emerging Hot Spot Analysis (EHSA) technique with the Mann-Kendall technique. The method is applied to d...

This paper proposes a novel multi-criteria decision support framework for climate change-sensitive evaluation of building thermal comfort performance in European buildings. The proposed framework considers various comfort categories based on building use and condition, comfort models based on building operation, sensitivity to climate change, key p...

19 A novel low-cost earthen construction system integrating biosourced aggregates is proposed for 20 houses' erection of low-income households. This study is based on in-situ measurements on two 21 representative test cells constructed in Douala, with a typical hot and humid climate. One of these 22 buildings is made with a hollow cement block as a...

With climate change and the recurring heat waves in arid lands, human well-being and activities in oasis settlements can be critical subjects for the ongoing years. This paper introduces a methodological approach to investigate the potential passive cooling effect inside the oasis palm groves, their spatial characteristics, and microclimatic thresh...

A PID controller is introduced into a latent heat thermal energy storage unit to compose a coupling system in order to control the discharging performance. Outlet temperature of the working fluid can be precisely regulated by means of its inlet velocity variation based on the PID controller. The theoretical model is built through combining heat tra...

With increasing urbanization, overheating intensifies, resulting in a greater risk of indoor overheating in commercial buildings, which already have high internal gains. The impact of urban climate on the cooling energy needs of buildings has been extensively researched. However, the building performance during extreme heat events needs further inv...

A R T I C L E I N F O Keywords: Outdoor thermal environment Dense urban fabric ENVI-met numerical model Height to width ratio Sky view factor, convection parameters A B S T R A C T The quality of the thermal urban environment plays a vital role in outdoor human activities and the overall quality of life in residential neighborhoods. This study inve...

Climate change significantly impacts building performance. Indoor comfort, energy demand, carbon emissions, and building maintenance costs vary according to the local climate. This research has been conducted to investigate, simulate, analyze, compare, and discuss the potential impact of climate change on thermal comfort, heating, and cooling energ...

Urban development and its climatic consequences have caused urban decision-makers to establish strategies to mitigate climate change. The implementation of different green spaces is one of the main strategies to reduce the environmental and climatic consequences of urbanization. Therefore, the main objective of this research is to reveal the effect...

With the ongoing significance of overheating calculations in the residential building sector, building codes such as the European Energy Performance of Building Directive (EPBD) are essential for harmonizing the indicators and performance thresholds. This paper investigates Europe's overheating calculation methods, indicators, and thresholds and ev...

This document specifies procedures for calculating the energy needs for heating and cooling, internal temperatures and sensible and latent heat loads of a building according to the hourly calculation methodology in ISO 52016-1. Additions or modifications of the calculations are provided in this document if the building envelope contains one or more...

This scientific article presents the results of computational fluid dynamics (CFD) simulations conducted using OpenFOAM to evaluate the effectiveness of a jet fan ventilation system in managing the dispersion of smoke resulting from a car fire incident within an underground car park spanning a total area of 21,670 m 2 , situated in Tabriz, Iran. Th...

Design decision-making during the early stages of facade development influences the final performance of buildings. The role of architects is to integrate their design with energy analysis. Thus, this process can lead to decision fatigue and significant time investment when using building simulation tools to consider the numerous possibilities and...

This study aims to inform the building designers about hygrothermal exposure risks in nearly zero-energy schools and the importance of evaluating these risks during short-term extreme heat events. The hygrothermal exposure in the reference school was evaluated using a metric called heat index [°C], which calculates the level of hygrothermal risks u...

Adaptive building envelope technologies can improve buildings' energy efficiency while maintaining a comfortable indoor environment. However, with the growing trend of developing new technologies for building performance management, adaptive facades have become more relevant for balancing user comfort and energy load. There are several ways to cont...

Overheating risk is expected to rise in dwellings as heat waves continue increasing in intensity and duration. This paper presents a simulation-based study on thermal resilience in a benchmark renovated nearly zero-energy dwelling during intense heat waves in Belgium. Data analysis using thermal simulations of the reference dwelling with and withou...

In this study, earth blocks (EB) and compressed earth blocks (CEB) are fabricated and investigated along with the development of a mathematical model of compressive and tensile loads. The investigated specimens are manufactured from a mixture of soil, ground recycled concrete (GRC) powder and water in weight fractions of 4:1:1. EBs are molded and C...

There is no consensus on usability testing in studies investigating the integration and decision support of building performance simulation in the architectural design process. This report presents an evaluation and reporting framework for usability testing and user experience investigations of building performance simulation tools in workplace and...

Urban Heat Islands (UHI) occur in and around cities, leading to warmer temperatures than in surrounding rural areas. The UHI effect increases energy demand, air pollution levels, and heat-related illness and mortality. Solar energy is one of the most widely adopted renewable energy generation technologies in the built environment. Solar photovoltai...

Thermal discomfort over time can lead to unproductivity and health issues for the occupants. Like operative temperature, humidity is an important parameter that affects thermal comfort and occupant health. This paper analyzed how humidity was incorporated into spatial and personalized thermal comfort assessments and models. In addition, the paper s...

The Building integrated with phase change material (PCM) creates a large thermal barrier between the indoor thermal environment and the ambient, usually resulting in an overheating problem in summer. Dynamic insulation system (DIS) based on airflow is introduced into PCM to form a composite structure featured with switchable thermal resistance to a...

This dataset was developed between May 2018 and April 2019 to evaluate the building performance of a nearly zero-energy office building in a temperate oceanic climate. This dataset refers to the research paper titled “Performance evaluation of a nearly zero-energy office building in temperate oceanic climate based on field measurements”. The data p...

Indoor Environmental Quality (IEQ) is a crucial for ensuring comfortable and healthy indoor spaces, and it is influenced by four primary factors: thermal comfort, acoustic comfort, visual comfort, and air quality. These aspects have a combined influence on the overall perception of comfort, and therefore, need to be assessed with a holistic approac...

As climate change continues, it is expected that the risk of overheating will rise in both new and existing buildings in mixed humid climate zones in Europe. This study introduced a novel climate change sensitive sizing and design approach for cooling and heating systems in nearly zero-energy office buildings in Brussels, Belgium, for different wea...

Low-emission zones (LEZs), incentivizing electric cars, park-and-ride systems, and other traffic reduction schemes, are all single measures aimed at achieving low-/zero-emission mobility. This paper aims to investigate the impact of LEZs’ passenger car banning and argues that such single measures cannot achieve significant traffic or emission reduc...

This study conducted a sensitivity analysis and assessed the effects of long-term weather conditions on green roof models, including recycled and artificial materials. Climate conditions can affect the hygrothermal performance of green roof materials, but this important issue has hardly been evaluated for drainage and substrate layers made of recyc...

Adaptive building envelope technologies can increase the energy efficiency of buildings. Adaptive facades can be controlled automatically and respond to environmental changes. There is no standard method for evaluating control strategies for adaptive façade elements, particularly for dynamic shadings. Therefore, the ISO/DIS 52016–3 recommended diff...

It is expected that heatwaves will strike more frequently and with higher temperatures with the continuation of global warming. More extreme heatwaves concurrent with disruptions in the cooling system can lead to significant overheating problems in buildings affecting occupants’ health, productivity, and comfort. This paper projects current and fut...

The objective of Annex 80 is to develop, assess and communicate solutions for resilient cooling. The systematic assessment of resilient cooling strategies is one of the main activities of Annex 80. As stated in Annex Text: Activity B.1 includes a systematic assessment of potential benefits, limitations and performance indicators of resilient coolin...

Adapting the Built Environment for Climate Change: Design Principles for Climate Emergencies analyzes several scenarios and proposes various adaptation strategies for climate emergencies (heat waves, wildfires, floods, and storms). Divided into three themes, the book offers an organized vision of a complex and multi-factor challenge. It covers clim...

Dataset de temperatura y humedad relativa para un TMY en Colombia actualizado al 2021

Space cooling now has the fastest-growing energy end-use in buildings, with an almost tripled energy demand compared to 1990. This paper provides a state-of-the-art review of different integrated active cooling systems for buildings. The cooling systems are classified based on the energy source, with attention to the performance of the systems unde...

With climate change, Belgium is experiencing and will experience more frequent and severe heat waves, which are particularly difficult to withstand in cities due to the urban heat island effect. In this study, we investigate the evolution of heatwaves in Brussels since 1981 and in the future, up to 2100, using climate simulations from global models...

Substituting natural aggregates in the green roof substrate and drainage layers with lightweight artificial and recycled coarse materials is an eco-friendly alternative for applying lower load to the rooftops and preserving natural resources. However, a lack of precise understanding of the thermal resistance, water passing ability, and water holdin...

s: An active phase change heater is configurated to transform excess electricity at off-peak tariff periods into thermal energy, store and release it at the electricity on-peak tariff periods in order to accomplish heating demand towards an existing building with marine climate. Reliable numerical model is developed based on phase change heat trans...

The overarching aim of the project is to contribute to increasing the competitiveness of the Walloon building engineering services sector. The project aims to strengthen the technical capacity of design consultancies to estimate thermal comfort in commercial and residential buildings, avoid overheating, and expand the integration of low-carbon cool...