Avec 42% de la consommation d'énergie finale et 25% des émissions de CO2, le secteur des bâtiments en France représente un enjeu majeur pour maîtriser la facture énergétique des ménages, des collectivités et de l'État. Cette thèse s'attache ainsi à analyser la façon dont les territoires sont en capacité de s'engager dans des projets destinés à réduire les consommations énergétiques des bâtiments. Elle propose de formaliser une démarche de conception collaborative de programmes d'efficacité énergétique des bâtiments, mobilisable par des acteurs souhaitant s'engager dans de tels projets. L'hypothèse de base de la thèse consiste en effet à affirmer qu'une amélioration significative et durable des bâtiments ne peut s'envisager sans revoir en profondeur le fonctionnement actuel du secteur bâtiment-énergie afin de l'engager vers un modèle basé sur l'économie de fonctionnalité. Trois terrains d'expérimentations ont servi de référence à la construction de l'argumentation et à sa validation : les départements de Meuse et de Haute-Marne, les villages de Dammarie-sur-Saulx et Epizon, et la ville de Commercy.Ce travail conclut sur les facteurs clés de succès d'un programme d'efficacité énergétique et de son évaluation ; la nécessité d'avoir un nouveau modèle économique comme repère pour fonder la pertinence de l'action. Elle souligne enfin son intérêt pour d'autres programmes prenant en charge une évolution de l'organisation de la filière du bâtiment / With 42% of the final energy consumption and 25% of CO2 emissions, the French building sector represents a major challenge to manage the energy bill for households, regional communities and the State. This doctoral thesis analyses how communities are able to be involved in projects aiming at reducing energy consumptions in buildings. It proposes to formalize a collaborative design process of energy efficiency program, usable for local actors. The original thesis hypothesis asserts that a significant improvement of the energy efficiency in buildings depends on a paradigm shift of the economic model and proposes the functional economy as a potential solution. Three experimentations were followed to build the argumentation and its validation: the departments of Meuse and Haute-Marne, the two villages of Dammarie-sur-Saulx (Meuse) and Epizon (Haute-Marne) and the city of Commercy (Meuse). This work defines on key success factors of a energy efficiency program and its assessment; the need to use a new economic model as a landmark to establish the action relevance. This work highlights also other programs taking account an evolution of the building sector organisation

Flerbostadshus anses viktiga för att minska energianvändningen i byggnader, och potentialen att energieffektivisera i samband med renovering är stor. Denna studie behandlar hur arbete med energifrågor genomförs i renovering av flerbostadshus byggda under miljonprogrammet i stadsdelen Östra Sätra i Gävle. Avhandlingens analytiska verktyg baseras på perspektiv utvecklade inom teknik och vetenskapsstudier (STS) och aktörsnätverksteori (ANT) samt urbana studier. I studien utvecklas och tillämpas verktyget energisammansättningar. Genom en symmetrisk ansats studeras energifrågors definition och innehåll i renoveringen genom att spåra kedjor av översättningar. Det empiriska underlaget är kvalitativa intervjuer, mål- och strategidokument, beslutsprotokoll och observationer. Avhandlingen visar att energiarbetets innehåll flätades samman med exempelvis kommunal planering och energipolitik, med bostadsbolagets befintliga arbetssätt för renoveringar och dess relationer till sina kunder, samt med lagen för allmännyttiga bostadsbolag. Studien identifierar också att spänningar uppstod i energiarbetet inom flera områden. Dessa rör hur de ekonomiska vinsterna och kostnaderna för energiarbete ska beräknas och fördelas, översättningar av energimål, var och hur energiarbete ska prioriteras i den bebyggda miljön, i vilken takt energiarbetet ska ske och hur de boende ska delta i energiarbete. Studien visar att energieffektiviserande åtgärder prioriterades i renoveringen så länge som de beräknades vara ekonomiskt affärsmässiga och en del av det allmännyttiga arbetet, men även hur förändringar var svåra att genomföra om de utmanade eller förändrade befintliga relationer och arbetssätt. Det gällde särskilt i relationen till de boende i området och till ekonomiska kostnader för renoveringen. / Transforming the energy used in apartment buildings have become increasingly important issues. This study examines how energy issues were designed in a refurbishment project for apartment buildings built during the “Million Programme” era in Sweden in the district of Östra Sätra in Gävle. The analytical approach and tools used are based on science and technology studies (STS), actor–network theory (ANT), and urban studies. Specifically, the study applies the concept of assemblages, which in this study are called energy assemblages. Energy issues are examined as they translated and negotiated in practice by actors and how they are incorporated into the refurbishment design. The empirical data are based on qualitative interviews, analyses of documents, and observations. The analyses demonstrate that work on energy issues was intertwined with the city’s work on planning and energy issues, the housing company’s working practices, as well as the laws governing public housing companies. The study also demonstrates that sometimes tensions arose in situations in which different energy assemblage processes collided. The study identifies several areas of tension. First, tensions arose in situations of diverse translations of energy goals. Second, in negotiations about calculations of the financial costs of energy transition. Third, tensions also arose when determining where energy transition should be located. Fourth, about resident participation in energy issues. Fifth, the energy transition timeframe. The study demonstrates that energy efficiency measures were prioritized in the refurbishment as long as they were treated as financially beneficial and did not challenge or change existing relationships, work practices, and customer relations.

Le projet de doctorat vise à présenter une nouvelle approche intégrée en support des opérateurs dans la gestion du processus de conception d'interventions de rénovation énergétique et architecturale du patrimoine bâti récent, grâce à l'emploie de solutions technologiques d'enveloppe innovantes. La recherche se fonde sur la collection d'un répertoire sélectionné des solutions architecturales et constructives d'enveloppe, nécessaire pour constituer une base valide sur laquelle étudier des solutions technologiques novatrices pour la réhabilitation énergétique des écoles dans l'après-guerre, en béton armé, généralement préfabriquées. Le projet identifie des processus constructifs éco-durables pour la conception des composants de façade “active”, adaptable et efficace, à assembler à sec, en conformité avec les exigences de performance requises par la réglementation actuelle. La recherche est finalisée à la gestion de l'ensemble du processus, soutenu par des systèmes de relevé géométrique, connectés aux logiciels de programmation paramétrique pour la modélisation des surfaces capables de s'adapter aux différentes morphologies du patrimoine existant. Ces outils informatisés CAO-FAO sont reliés aux machines à contrôle numérique CNC pour la fabrication des éléments de façade “sur mesure”. À démonstration de l'approche innovante proposée, deux possibles solutions d'enveloppes ont présentées, dans la ligne droit des principes de durabilité, comprise comme modularité, rapidité de mise en œuvre, réversibilité, récupération et réutilise des matériaux. En particulier, les solutions innovantes sont réunies par l'application d'une technique basée sur l'assemblage d'éléments préfabriqués, l'adoption d'un pavage hexagonal pour le dessin de la nouvelle surface d'enveloppe, et l'utilisation du même matériau isolant thermique, plastique et inorganique, recyclé, éco-durable, à faible impact environnemental (AAM - Alkali Activated Materials).Les solutions proposées, développées dans les sièges de cotutelle (Université de Bologne, Université Paris-Est) sont envisagées selon un protocole scientifique qui prévoit: conception du système constructif, analyse mécanique et thermique, expérimentation constructive, validation des techniques de mise en œuvre et des performances / The research is aimed at presenting a new integrated approach to aid operators and designers to manage the design process as a whole in refurbishment interventions of recent existing building stock, through the use of innovative technological envelope solutions. The study requires the acquisition of a selection of typological and constructive envelope solutions, as a starting point for the development of design solutions to be used for architectural renovation of schools built after the Second World War, in reinforced concrete and mostly prefabricated. The project identifies sustainable construction processes for the design of “active”, adaptive, efficient and dry assembled envelope components, in accordance with the performance requirements prescribed by current regulations. The purpose of the research is to manage the whole design process with the support of geometrical survey, connected to parametric programming software for modelling surfaces which can be adapted to the morphology of existing buildings. These computerized CAD-CAM tools are connected to CNC machines for “customized” industrialized production. To illustrate this innovative approach, two envelope solutions are proposed, according to the research paradigms and the principles of sustainability, meant as modularity, speed of setup, reversibility, recycling and reuse of materials with low environmental impact. In particular, the innovative solutions have in common the application of a technique based on the assembly of prefabricated components, the adoption of hexagonal patterns for the tessellation of the new surface of the façade, and the use of the same plastic and inorganic, recycled and sustainable, thermal insulation material (AAM-Alkali Activated Materials).The design solutions proposed are developed at the two sites involved in the joint

Concilier patrimoine et amélioration de la performance énergétique du bâti ancien est un défi pour de nombreux centres historiques. La Communauté d’Agglomération du Grand Cahors, qui finance ce travail de thèse à travers une convention CIFRE, a souhaité s’attaquer à cette problématique en valorisant des isolants bio-sourcés. Le choix du matériau et du système d’isolation sont essentiels car ils influencent à la fois la performance hygrothermique de la paroi, la qualité de l’air intérieur, le coût et l’empreinte carbone de la rénovation. Dans cette étude, nous nous sommes focalisé sur la performance hygrothermique de la paroi afin d’assurer que la mise en place d’une isolation par l’intérieur ne soit pas source de dégradations futures de la paroi. Pour cela, nous avons confronté différents outils et méthodes tels que la caractérisation physique des matériaux, une instrumentation in-situ dans deux appartements du centre ancien de Cahors et des simulations hygrothermiques alliant différents outils numériques. / Improving the energy efficiency of buildings is essential to reduce greenhouse gas emissions and mitigate against climate change. Historic dwellings represent a large part of the French building stock that needs to be refurbished. In the city center of Cahors, France, the old medieval dwellings are considered as valuable cultural heritage and internal insulation is often the only insulation technique that can be used when the architectural value of the exterior façade is to be preserved. This PhD thesis, funded by a CIFRE agreement with the Communauté d’Agglomération du Grand Cahors, studied the suitability of bio-based materials for the internal insulation of historical dwellings in urban area. The selection of the insulation material and the system is crucial because of its impact on the hygrothermal performance of the wall, the indoor air quality, the financial cost, and the carbon footprint of the refurbishment solution. In this study we focused on the hygrothermal performance of the walls to provide a reliable risk assessment in order to avoid hygrothermal failure. Due to the complexity of the problem and the lack of needed data, we ran a multi-scale study including both experimental (laboratory characterisation and building monitoring) and numerical modelling methods.

As there are more than 1.4 billion smartphones sold every year in the world and around four million smartphones in Sweden. In recent years there has been a growing concern to move from a linear economic system to a circular economic system. Smartphones and other electronic equipment stand for the largest growing waste streams in the European Union. The rising prices of raw materials used in smartphone manufacturing over the last decades, along with the fact that these minerals are being mined in conflict stricken areas and the growing environmental awareness among people makes the refurbished smartphone’s market very current. Thus, it is of great interest to investigate consumer behaviour linked to refurbished smartphones as it is still in its early stages. As such, many of the barriers identified in this thesis can be linked to the communication of refurbished smartphones. The purpose of this thesis is to get a deeper understanding of how companies can communicate to break the barriers that exists for the consumer acceptance of refurbished smartphones in the Swedish market. Earlier studies have also focused on refurbishment as a concept rather than the consumer’s responses towards it. The study will be conducted in Sweden which has not been done previously. Therefore, our study will contribute to a deeper understanding of the consumer behaviour in the refurbished smartphone market in Sweden and thus aid companies in their communication of refurbished smartphones. To fulfil the purpose, a qualitative study has been conducted through semi-structured interviews. The sample groups were environmental enthusiasts, technology experts, refurbished product buyers, second hand buyers and companies. From the interviews five themes were derived: initial response, benefits, risks, barriers and communication. The findings and conclusions of the thesis are derived from the themes and subthemes that were created. There are many barriers and risks that make people avoid purchasing refurbished smartphones. The findings suggest that the consumers’ initial response are generally very positive and many consumers would consider a refurbished smartphone as their next smartphone purchase. Another finding is that a lack of knowledge about refurbishment lead to doubts about refurbished smartphones. The barriers found were lack of awareness, lack of thrill of newness, naming of refurbished products and lack of knowledge. The largest barrier, was lack of awareness. A solution to resolve this barrier could be to communicate the refurbishment process. A major finding was that that the environmental aspects were a vital purchase criteria for the consumers, however, not the most vital aspect. Moreover, societal benefits were raised regarding refurbished products in terms of benefitting the entire society. The biggest risk detected in the study was the performance, risk as the consumer may believe that the smartphone will be in a poor condition even though it has been refurbished. A big risk was the financial risk in terms of the substantial price for a refurbished smartphone. To reduce this the companies could adapt to the market standard and sell their refurbished smartphones in package deals. Our findings suggest that price should be communicated in combination with warranty and also environmental aspects, however, the environmental aspect is often abstract. The companies should consider using branding more to communicate these messages. Word of mouth was seen to be important and companies should utilise customer reviews more. In terms of emotional and rational appeals both should be used, however, what appeal that the companies should focus on emphasise on is not obvious.

Le projet de doctorat vise à présenter une nouvelle approche intégrée en support des opérateurs dans la gestion du processus de conception d'interventions de rénovation énergétique et architecturale du patrimoine bâti récent, grâce à l'emploie de solutions technologiques d'enveloppe innovantes. La recherche se fonde sur la collection d'un répertoire sélectionné des solutions architecturales et constructives d'enveloppe, nécessaire pour constituer une base valide sur laquelle étudier des solutions technologiques novatrices pour la réhabilitation énergétique des écoles dans l'après-guerre, en béton armé, généralement préfabriquées. Le projet identifie des processus constructifs éco-durables pour la conception des composants de façade “active”, adaptable et efficace, à assembler à sec, en conformité avec les exigences de performance requises par la réglementation actuelle. La recherche est finalisée à la gestion de l'ensemble du processus, soutenu par des systèmes de relevé géométrique, connectés aux logiciels de programmation paramétrique pour la modélisation des surfaces capables de s'adapter aux différentes morphologies du patrimoine existant. Ces outils informatisés CAO-FAO sont reliés aux machines à contrôle numérique CNC pour la fabrication des éléments de façade “sur mesure”. À démonstration de l'approche innovante proposée, deux possibles solutions d'enveloppes ont présentées, dans la ligne droit des principes de durabilité, comprise comme modularité, rapidité de mise en œuvre, réversibilité, récupération et réutilise des matériaux. En particulier, les solutions innovantes sont réunies par l'application d'une technique basée sur l'assemblage d'éléments préfabriqués, l'adoption d'un pavage hexagonal pour le dessin de la nouvelle surface d'enveloppe, et l'utilisation du même matériau isolant thermique, plastique et inorganique, recyclé, éco-durable, à faible impact environnemental (AAM - Alkali Activated Materials).Les solutions proposées, développées dans les sièges de cotutelle (Université de Bologne, Université Paris-Est) sont envisagées selon un protocole scientifique qui prévoit: conception du système constructif, analyse mécanique et thermique, expérimentation constructive, validation des techniques de mise en œuvre et des performances / The research is aimed at presenting a new integrated approach to aid operators and designers to manage the design process as a whole in refurbishment interventions of recent existing building stock, through the use of innovative technological envelope solutions. The study requires the acquisition of a selection of typological and constructive envelope solutions, as a starting point for the development of design solutions to be used for architectural renovation of schools built after the Second World War, in reinforced concrete and mostly prefabricated. The project identifies sustainable construction processes for the design of “active”, adaptive, efficient and dry assembled envelope components, in accordance with the performance requirements prescribed by current regulations. The purpose of the research is to manage the whole design process with the support of geometrical survey, connected to parametric programming software for modelling surfaces which can be adapted to the morphology of existing buildings. These computerized CAD-CAM tools are connected to CNC machines for “customized” industrialized production. To illustrate this innovative approach, two envelope solutions are proposed, according to the research paradigms and the principles of sustainability, meant as modularity, speed of setup, reversibility, recycling and reuse of materials with low environmental impact. In particular, the innovative solutions have in common the application of a technique based on the assembly of prefabricated components, the adoption of hexagonal patterns for the tessellation of the new surface of the façade, and the use of the same plastic and inorganic, recycled and sustainable, thermal insulation material (AAM-Alkali Activated Materials).The design solutions proposed are developed at the two sites involved in the joint

Cieľom predkladanej diplomovej práce je skúmať a analyzovať možnosti prispôsobovania koeficientu tepelnej rozťažnosti nástrekov z kompozitných materiálov deponovaných na substráty pomocou technológie cold spray. Kompozitné materiály sú v tomto prípade reprezentované zmiešanými práškami, ktoré sú pripravené pridávaním fázy s negatívnou tepelnou rozťažnosťou do základného materiálu s kladným koeficientom tepelnej rozťažnosti. Takto pripravené nástreky môžu byť užitočné pri opravovaní a renovácii strojárenských súčiastok. V prvej časti je priblížená samotná technológia cold spray spolu s jej využitím pri opravách a renováciách v strojárenskom priemysle. Ďalej sa práca zaoberá tepelnou rozťažnosťou materiálov, kde je predstavený jav negatívnej tepelnej rozťažnosti. V experimentálnej časti práce je vyhodnotený potenciálny efekt negatívnej tepelnej rozťažnosti pri deponovaní nástrekov pomocou technológie cold spray.

The subject of this master thesis is detection how the redevelopment and refurbishment affect regular price of family house. For valuation I chose the building in which I grew up so I know it very good. The family house is located in small south-moravian town Kyjov, in district Nětčice. The family house has a basement and two upper floors. Constructions were completed in 1962. Since 1976 many quite expensive redevelopment and refurbishment have been done. For property valuation is used method of direct comparison with the use of database of similar family houses in Kyjov and also cost method according to law number 441/2013 Sb. Valuation is done in two versions – for building in original condition (in 1985) and in current condition. All at once a couple of variants of redevelopment, which are common nowadays, and for one variant is made the itemized budget. Result of this master thesis should be detection if it is better to buy house after redevelopment and refurbishment or house in original condition and make these structural modifications until then.

The aim of the research is to explore the differences in final energy consumption and environmental impact of the construction materials related to the atrium alternative and a business-as-usual and evaluate how to improve thermal properties of old buildings that require renovations to fit thermal efficiency standards and comfort in operational conditions while reducing the overall impact of the projects. Results show that for the low-rise atrium most of the parameters related to the final energy demands and environmental impacts of the atrium construction materials are proportional and linear to the increase of the glazing area size. When compared to simply renovating old structures, the atrium alternative can promote a decrease in thermal losses by transmission and increase in incident solar radiation through the glazed area depending on the atrium dimensions and glazing area size. And although cooling, heating, electrical and ventilation demands are raised for the overall demand of the building the construction of an atrium bears less environmental impact than renovating old structures damaged by weather. / <p>2021-04-08</p>

My diploma thesis is based on the module Res Publica - Public works focusing on community buildings. Dozens of towns were surveyed, whether they are interested in reconstruction of their community or sociocultural centre, and eventually a small town Dolní Kounice was chosen especially because of the beauty of the surrounding countryside as well as the exciting native urbanism and architecture. This thesis deals with transformation of the cultural house from the 50s of the 20th century to a new cultural centre. The extension and inconvenient terrace were removed and the hall is supported by a new mass of the vestibule at the interface between interior and exterior, on the site of the former patio. Next, a new front of the building was introduced which increased the entrance of the house and created a space for a study room, small gym, meeting room and common rooms. The part of the house used for housing units is designed only with aesthetic details on the facade. The Culture Centre is divided into a set of materials in order to reduce the scale of the whole building. The entrance part mass, in contrast, is enhanced by its division and the chosen materials. In this way the originally embarrassing object of the Cultural Centre has been changed into a new centre with a clear architectural expression and the interior of the house is enriched by view of the beauty of the city.