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Dissertation
Travail de fin d'études et stage[BR]- Travail de fin d'études : Using passive cooling techniques to improve resilience to global warming of nearly zero-energy buildings[BR]- Stage d'insertion professionnelle
Authors: --- --- --- ---
Year: 2021 Publisher: Liège Université de Liège (ULiège)

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With climate change, the energy consumption of buildings for cooling purposes is expected to rise, further enhancing global warming through the increase of greenhouse gas emissions. To break this vicious circle, it is essential to decrease the anthropogenic CO2 emissions by lessening the energy consumption in all sectors. Buildings are responsible for 40% of energy consumption in the European Union, according to the International Energy Agency (IEA). The urge to build more energy-efficient buildings resulted in the emergence of nearly zero-energy buildings (nZEB). However, the specifications the nZEB design should comply with might not be sufficient to prevent the risk of overheating in summer, hence the purchase of an active cooling system. &#13;Passive cooling techniques are investigated through a dynamic simulation of a nearly zero-energy dwelling. Their efficiency is assessed based on their ability to improve thermal comfort while limiting the increase in energy consumption. Thermal comfort is measured based on the theory of adaptative comfort which is the most relevant for a residential building. The passive cooling techniques can be combined to ensure the resilience of the building to global warming. It was found that the most efficient techniques are the ones relying on ventilative cooling. In Western Europe, day cooling should be combined with night cooling to reduce the overheating risk and improve thermal comfort by 39%. Solar protections and smart glazing also offer an efficient protection against overheating. They improve thermal comfort by respectively 34 and 22%. &#13;The effectiveness of the combined passive cooling techniques is studied over an extreme meteorological event, which is likely to occur by 2100 if nothing is done to prevent global warming. Twenty days of intense heat are studied to evaluate the resilience of a nZEB. It was found that the most efficient combination includes night cooling, thermochromic glazing and adiabatic cooling. Adiabatic cooling is particularly efficient during heat waves. Those techniques allow to decrease the indoor temperature by almost 10°C. However, occupants’ behaviour could have a negative impact on the cooling techniques efficiency.


Dissertation
Travail de fin d'études / Projet de fin d'études : Conception d'archétypes d'habitat bioclimatique en briques de terre comprimée à Ouagadougou au Burkina Faso
Authors: --- --- --- ---
Year: 2024 Publisher: Liège Université de Liège (ULiège)

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Ouagadougou fait face à une forte demande de logements, combinée à un important étalement urbain. La construction de bâtiments à plusieurs étages en briques de terre comprimée (BTC) offre une solution durable et résiliente à ces problèmes. Malgré ces avantages, la BTC est souvent associée à des constructions de mauvaise qualité. La population lui préfère des matériaux associés à une architecture d'inspiration occidentale, qui ne sont pas adaptés aux conditions climatiques locales. Promouvoir l'utilisation de la BTC dans une architecture bioclimatique de haut standing pourrait améliorer les conditions de vie tout en valorisant les ressources locales.&#13;Après une analyse du contexte local, trois archétypes d'habitats bioclimatiques ont été conçus en collaboration avec des experts en architecture de terre crue du Burkina Faso. Les performances structurelles et thermiques de ces habitats sont évaluées à l'aide de simulations.&#13;Trois archétypes d'habitat bioclimatique en BTC sont conçus : un immeuble de cinq étages, un immeuble de trois étages et une villa de deux étages. Des recommandations sont formulées pour la construction de murs porteurs sur plusieurs niveaux en BTC. En termes de confort thermique, les immeubles à appartements sont nettement plus performants que les villas. Une différence de près de 60 % de degrés-heures d’inconfort est observée entre ces deux types de bâtiments. La construction d'un immeuble de trois étages semble être la solution la mieux adaptée aux problèmes actuels de Ouagadougou, offrant un bon confort thermique tout en permettant la densification de l'environnement bâti avec des BTC à faible impact environnemental.&#13;Ces résultats contribuent à développer les connaissances liées à la construction de bâtiments en BTC sur plusieurs niveaux et à l’amélioration du confort thermique au Burkina Faso. Ils constituent des références pour les professionnels du secteur immobilier et les populations locales, favorisant ainsi la diffusion de cette technologie. Cette étude démontre les avantages de la construction d’immeubles à appartements en BTC, encourageant maîtres d'ouvrage, promoteurs et pouvoirs publics à entreprendre et à soutenir de tels projets.


Book
Visueller Komfort und Tageslicht am Büroarbeitsplatz. Eine Felduntersuchung in neun Gebäuden
Author:
ISBN: 1000044751 3731503123 Year: 2014 Publisher: KIT Scientific Publishing

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The study contributes to the determination of parameters that influence occupant satisfaction with the daylighting of workplaces in everyday life under consideration of seasonal differences. The users&#8217; assessments (977 questionnaires) are supplemented by an analysis of the users&#8217; behavior that allows conclusions on the users&#8217; needs and on their tolerance towards adverse conditions. By evaluating users&#8217; ratings and interventions, clues for the planning of user friendly buildings can be identified.


Book
Assessing the Overheating Risk of Buildings.
Authors: ---
ISBN: 9783111318653 3111318656 Year: 2024 Publisher: Berlin/Boston : Walter de Gruyter GmbH,

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The book presents the current state of the art for assessing the overheating risk of buildings. This includes the main effects and correlations related to site climate (including meso- and microclimate), comfort assessment, building-occupant interaction, and building design. Findings and action strategies are summarised.


Dissertation
Travail de fin d'études / Projet de fin d'études : La prise en compte des genres dans la perception du confort thermique en période hivernale : révision d'une enquête standardisée
Authors: --- --- ---
Year: 2024 Publisher: Liège Université de Liège (ULiège)

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L’audience visée par ce travail est constituée des usagers de bureaux, des propriétaires de bureaux, des architectes, des étudiants en architecture, des chercheurs scientifiques, des gestionnaires de bâtiment et des bureaux d’étude.&#13;Les enjeux du réchauffement climatique indiquent l’urgence d’agir davantage dans la diminution des consommations énergétiques du secteur du bâtiment. Le confort thermique doit être pensé conjointement aux enjeux climatiques et sociaux afin de fournir des solutions concrètes qui garantissent un espace confortable, accessible à tous et respectueux de l’environnement. De plus, dans la recherche scientifique, l’historique de la non-prise en compte de la femme interroge la validité des théories empiriques du confort thermique les plus répandues. Les normes actuelles se basent sur ces théories empiriques, mais n’apportent aucune indication vis-à-vis de la prise en considération du sexe dans les équations. &#13;Face à ces constats, la recherche s’articule autour d’une approche centrée sur la réalisation d’une enquête de bien-être. Les objectifs sont d’une part d’évaluer la différence de la perception du confort thermique entre les genres, en hiver, dans des espaces de bureaux paysagers (open space). D’autre part, l’objectif est également d’évaluer la pertinence d’intégrer davantage les différences de genre dans un questionnaire standardisé servant de référence (ANSI/ASHRAE Standard 55, 2020). &#13;La collecte de données est organisée autour d’une partie quantitative et d’une partie qualitative. L’espace de travail fait l’objet d’une évaluation de ses paramètres physiques (température, vitesse et humidité de l’air) via un appareil de mesure spécifique. Il s’agit de la partie quantitative. Quant à la partie qualitative, elle est soutenue par l’enquête soumise aux répondants. &#13;L’analyse statistique des résultats permet de fournir une réponse concluante à la question de recherche posée soit la pertinence d’intégrer ou non davantage de paramètres intrinsèques aux sexes dans l’évaluation du confort thermique.&#13;Parmi les variables testées en lien avec le confort thermique, seules deux d’entre elles ont montré une différence significative entre les hommes et les femmes. Il s’agit de la sensation thermique exprimée sur une échelle allant de « chaud » à « froid » et l’habillement (=isolation thermique des vêtements) des répondants. &#13;Ces résultats constituent l’amorce d’une première démarche issue de la problématique énoncée. Une recherche à plus grande échelle de l’impact des caractéristiques intrinsèques aux femmes sur leur confort thermique permettrait de fournir une conclusion valide. Elle affinerait la théorie du confort thermique quant à la pertinence de prendre systématiquement en considération ces paramètres dans les questionnaires et les équations empiriques. The target audience for this work is office users, office owners, architects, architecture students, scientific researchers, building managers and design offices.&#13;The challenges of global warming indicate the urgent need to do more to reduce energy consumption in the building sector. Thermal comfort needs to be considered in conjunction with climate and social issues, in order to provide practical solutions for guaranteeing a comfortable space that is accessible to all and respects the environment. In addition, the history of the consideration of women in scientific research calls into question the validity of the most widespread empirical theories of thermal comfort. Current standards are based on these empirical theories, but give no indication of how gender should be taken into account in the equations.&#13;Given these findings, the research is based on an approach centered on carrying out a well-being survey. The objectives are, firstly, to assess the difference in perception of thermal comfort between the genders in winter in open-plan office spaces. Secondly, to assess the relevance of incorporating gender differences more fully into a standardized questionnaire used as a reference (ANSI/ASHRAE Standard 55, 2020). The data collection is organized around a quantitative and a qualitative part. The physical parameters of the workspace (temperature, air speed and humidity) are assessed using a specific measuring device. This is the quantitative part. The qualitative part is supported by the survey submitted to the respondents. Statistical analysis of the results provides a conclusive answer to the research question posed, i.e. whether or not it is appropriate to include more parameters intrinsic to gender in the assessment of thermal comfort.&#13;Of the variables tested in relation to thermal comfort, only two showed a significant difference between men and women. These were the thermal sensation expressed on a scale ranging from ‘hot’ to ‘cold’ and the respondents' clothing (= thermal insulation of clothing). &#13;These results are the first step in addressing the problem. It is strongly recommended that further, larger-scale research be carried out into the impact of women's intrinsic characteristics on their thermal comfort. This would provide a valid conclusion for thermal comfort theory as to the relevance of taking these parameters into account in questionnaires and empirical equations.


Book
Indoor Thermal Comfort
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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As the century begins, natural resources are under increasing pressure, threatening public health and development. As a result, the balance between man and nature has been disrupted, with climatic changes whose effects are starting to be irreversible. Due to the relationship between the quality of the indoor built environment and its energy demand, thermal comfort issues are still relevant in the disciplinary debate. This is also because the indoor environment has a potential impact on occupants' health and productivity, affecting their physical and psychological conditions. To achieve a sustainable compromise in terms of comfort and energy requirements, several challenging questions must be answered with regard to design, technical, engineering, psychological, and physiological issues and, finally, potential interactions with other IEQ issues that require a holistic way to conceive the building envelope design. This Special Issue collected original research and review articles on innovative designs, systems, and/or control domains that can enhance thermal comfort, work productivity, and wellbeing in a built environment, along with works considering the integration of human factors in buildings’ energy performance.


Book
Indoor Thermal Comfort
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

As the century begins, natural resources are under increasing pressure, threatening public health and development. As a result, the balance between man and nature has been disrupted, with climatic changes whose effects are starting to be irreversible. Due to the relationship between the quality of the indoor built environment and its energy demand, thermal comfort issues are still relevant in the disciplinary debate. This is also because the indoor environment has a potential impact on occupants' health and productivity, affecting their physical and psychological conditions. To achieve a sustainable compromise in terms of comfort and energy requirements, several challenging questions must be answered with regard to design, technical, engineering, psychological, and physiological issues and, finally, potential interactions with other IEQ issues that require a holistic way to conceive the building envelope design. This Special Issue collected original research and review articles on innovative designs, systems, and/or control domains that can enhance thermal comfort, work productivity, and wellbeing in a built environment, along with works considering the integration of human factors in buildings’ energy performance.


Book
Indoor Thermal Comfort
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

As the century begins, natural resources are under increasing pressure, threatening public health and development. As a result, the balance between man and nature has been disrupted, with climatic changes whose effects are starting to be irreversible. Due to the relationship between the quality of the indoor built environment and its energy demand, thermal comfort issues are still relevant in the disciplinary debate. This is also because the indoor environment has a potential impact on occupants' health and productivity, affecting their physical and psychological conditions. To achieve a sustainable compromise in terms of comfort and energy requirements, several challenging questions must be answered with regard to design, technical, engineering, psychological, and physiological issues and, finally, potential interactions with other IEQ issues that require a holistic way to conceive the building envelope design. This Special Issue collected original research and review articles on innovative designs, systems, and/or control domains that can enhance thermal comfort, work productivity, and wellbeing in a built environment, along with works considering the integration of human factors in buildings’ energy performance.

Keywords

History of engineering & technology --- smart broiler chamber --- ventilation system --- wind velocity --- age of air --- computational fluid dynamics --- simulation analysis --- user awareness --- energy consumption --- individual metering --- feedback strategies --- N-ZEB --- IoT --- Trombe wall --- thermal comfort --- passive heating systems --- heat accumulation --- thermal comfort models --- thermal comfort assessment --- Fanger’s models --- moderate environments --- sport facilities --- desert cooler --- evaporative cooling --- indoor air quality --- liquid desiccant --- effectiveness model --- moisture removal --- PMV --- comfort indices --- software --- app --- building simulation --- health and comfort --- evaluation indicators --- work environments --- indoor environmental quality --- indoor comfort --- human health --- clothing thermal insulation --- thermoregulation model --- Tanabe model --- infrared camera --- indoor air quality (IAQ) --- hybrid ventilation --- demand controlled ventilation (DCV) --- internet of things (IoT) --- soft-sensor --- convolution neural networks --- draught --- cooling period --- open office --- thermal sensation --- biological structure and composition --- tissue temperature --- bioheat model --- MRI analysis --- sensitivity analysis --- smart broiler chamber --- ventilation system --- wind velocity --- age of air --- computational fluid dynamics --- simulation analysis --- user awareness --- energy consumption --- individual metering --- feedback strategies --- N-ZEB --- IoT --- Trombe wall --- thermal comfort --- passive heating systems --- heat accumulation --- thermal comfort models --- thermal comfort assessment --- Fanger’s models --- moderate environments --- sport facilities --- desert cooler --- evaporative cooling --- indoor air quality --- liquid desiccant --- effectiveness model --- moisture removal --- PMV --- comfort indices --- software --- app --- building simulation --- health and comfort --- evaluation indicators --- work environments --- indoor environmental quality --- indoor comfort --- human health --- clothing thermal insulation --- thermoregulation model --- Tanabe model --- infrared camera --- indoor air quality (IAQ) --- hybrid ventilation --- demand controlled ventilation (DCV) --- internet of things (IoT) --- soft-sensor --- convolution neural networks --- draught --- cooling period --- open office --- thermal sensation --- biological structure and composition --- tissue temperature --- bioheat model --- MRI analysis --- sensitivity analysis


Book
Urban Heat Island Mitigation Technologies
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This book is relevant to architects, urban designers, planners, and policy makers concerned with enhancing climate-sensitive urban form and planning. It discusses building and neighborhood design: layout and design features that maximize energy efficiency and thermal comfort without compromising the ability of other buildings to enjoy similar benefits; the use of interstitial spaces (piazzas, streets, and parks) to improve the microclimate at the neighbourhood-level; design intervention case studies; innovative uses of interstitial spaces to improve the local climate at the neighborhood level; and urban radiative cooling solutions to mitigate the unintended climate consequences of urban growth and suggestions for ways forward.


Book
Urban Heat Island Mitigation Technologies
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This book is relevant to architects, urban designers, planners, and policy makers concerned with enhancing climate-sensitive urban form and planning. It discusses building and neighborhood design: layout and design features that maximize energy efficiency and thermal comfort without compromising the ability of other buildings to enjoy similar benefits; the use of interstitial spaces (piazzas, streets, and parks) to improve the microclimate at the neighbourhood-level; design intervention case studies; innovative uses of interstitial spaces to improve the local climate at the neighborhood level; and urban radiative cooling solutions to mitigate the unintended climate consequences of urban growth and suggestions for ways forward.

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