Agency: Cordis | Branch: H2020 | Program: RIA | Phase: EeB-03-2014 | Award Amount: 5.99M | Year: 2015
Built2Spec brings together a new and breakthrough set of technological advances for self-inspection and quality assurance that will be put into the hands of construction stakeholders to help meeting EU energy efficiency targets, new build standards, and related policy ambitions. B2S will expand upon a cloud based construction support platform, conceived following the most advanced integrated design and delivery framework for the building sector and hosting applications that facilitate worksite activities and quality compliance by putting knowledge in hands of contractors, in the form of shared design specifications and 3D models, installation guidelines, information on regulatory frameworks, and help from construction experts on smartphones and tablets. New self-inspection technologies managed within the platform and developed in the project include: Special IR camera in smartphones coupled with new mathematical reverse models for on-the-fly analysis of existing buildings envelope thermal properties Rapid BIM modelling via instant 3D capture with smartphones, passed via the cloud to the refurbishment team back-office, allowing accurate instant energy efficiency evaluation, quality check and streamlined quotation process Portable, innovative low pressure air tightness technique allowing testing of occupied buildings Smart sensor-embedded construction elements (identification, structural performance, and building environment parameters) Portable single device for Indoor Air Quality tests offering multi-gas capabilities targeting the most harmful gas pollutants A novel lightweight portable sound source for on-site acoustic tests to regulation compliance The B2S system will be integrated into the operations of SME contractors, large construction firms, and end user clients directly within the consortium and work program activities, assuring systematic and scientific performance measures, feedback and powerful exploitation and dissemination strategies.
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: ENV.2009.3.2.1.1 | Award Amount: 3.52M | Year: 2010
The project tackles the problem of earthquake-impact on Cultural Heritage assets starting from basic consideration that efficient protection, with substantial guarantee of compatibility and low-intrusivity, can only be achieved with minimum intervention approach. This requires that potentialities of existing materials and components are as much as possible exploited in terms of strength and energy dissipation, and candidate interventions are validated and optimized on specific, real application conditions. At the project start, earthquake-induced failure mechanisms, construction types and materials, intervention and assessment techniques will be cross-correlated with the aim of developing new integrated methodologies with a systemic approach. Traditional materials will be enhanced by innovative industrial processes (e.g., nano-limes or micro-silica for injection), and new high-performance (e.g. dissipative) elements will be developed. Novel collaborative combinations of them will be tested on structural components (walls, pillars, floors, vaults) and on structural connections (wall-, floor- and roof-to-wall), which converge the behaviour of single strengthened elements into the global structural response. The envisaged techniques will be also validated on model buildings and substructures. Advanced numerical studies will allow parameterizing the results and deriving simple and optimized design procedures. Early warning techniques for intelligent interventions and advanced monitoring techniques for knowledge based assessment and progressive implementation of interventions will be also developed. This bottom-up approach will bring to new integrated materials, technologies and tools for systemic improvement of seismic behaviour of CH assets. The new solutions will be condensed into guidelines for end-users. The large participation of research centres, SME, and end-user from various countries, including ICPC and MPC, ensures increased impact of the research.
Mavromatidis L.E.,National School of Architecture |
Bykalyuk A.,INSA Lyon |
Bykalyuk A.,University Claude Bernard Lyon 1 |
Lequay H.,National School of Architecture
Applied Energy | Year: 2013
The building envelope's insulating efficiency is always a key element regarding the energy consumption control of the whole building. This article aims to propose a simple method based on classic and fractional factorial simulation plans to obtain regression models in the form of polynomial functions that link the angle, the thermal conductivity and the thickness of each envelope's component to the overall wall's thermal resistance. Original software that combines classic and novel modeling techniques has been used in order to have a precise and validated numerical investigation that focuses in a variety of possible composite dynamic wall's configurations. For the purposes of this study, the combined radiation/conduction heat transfer finite volume numerical model was updated complex enough to predict the temperature distribution and heat transfer in composite envelopes for a variety of inclination angles. The model takes into account the coupling between the solid conduction of both solid and fibrous systems and the gaseous conduction and radiation. The radiation heat transfer through each insulating layer has been modeled via the two flux approximation in order to take into account both optically thick and optically thin materials, as well as potential reflective surfaces currently used on composite wall's applications. Different simulation scenarios have been conceived according to basic fractional factorial simulation plans in order to obtain valid empirical polynomial functions. To validate this statistical forecast system, many simulation scenarios were carried out and the statistical results are in compliance with the numerical simulations. The regression models' results show that the error caused by simplification is acceptable in most conditions, and a lot of coupling calculation could be saved. Furthermore, the reduction of the complex numerical model to simple regression models in the form of polynomial equations aims to assist architects and engineers to directly obtain during the early design stages a high precision forecast of a composite envelope's thermal performance without mobilizing an expert's knowledge. Hence, having this knowledge they could optimize during the early design process the envelope's performance in order to finally achieve an integrated building design. © 2012 Elsevier Ltd.
Villadiego K.,Institute for Urbanism and Regional Planning IUAR |
Velay-Dabat M.A.,National School of Architecture
Building and Environment | Year: 2014
We carried out a thermal comfort survey in a hot and humid climate in Barranquilla, Colombia. Measures of climatic conditions and parallel thermal sensation questionnaires were used in order to increase knowledge about thermal sensation in tropical climates. We used the ASHRAE sensorial scale of seven symmetrical points to evaluate sensation; we also asked about agreement preference. The survey was focused on pedestrians in five different zones of Barranquilla established through the Local Climate Zone System. Results show a high tolerance to high temperature and relative humidity. The mean thermal sensation votes for the whole sample was 0=neutral; people felt satisfied but they preferred cooler temperatures. Thus, expectation and memory are other factors that influence perception. Also, the survey reveals that climate conditions are not enough to explain thermal sensation. Overall, air temperature, solar radiation and wind speed are the most influential parameters on thermal sensation. The results of the study contribute to knowledge about thermal comfort in tropical climates and encourage planners to include climate considerations into urban planning in order to improve the quality of thermal ambiance. © 2014 Elsevier Ltd.
Groleau D.,National School of Architecture |
Mestayer P.G.,French National Center for Scientific Research
Boundary-Layer Meteorology | Year: 2013
This heuristic study of the urban morphology influence on urban albedo is based on some 3,500 simulations with the Solene model. The studied configurations include square blocks in regular and staggered rows, rectangular blocks with different street widths, cross-shaped blocks, infinite street canyons and several actual districts in Marseilles, Toulouse and Nantes, France. The scanned variables are plan density, facade density, building height, layout orientation, latitude, date and time of the day. The sky-view factors of the ground and canopy surfaces are also considered. This study demonstrates the significance of the facade density, in addition to the built plan density, as the explanatory geometrical factor to characterize the urban morphology, rather than building height. On the basis of these albedo calculations the puzzling results of Kondo et al. (Boundary-Layer Meteorol 100:225-242, 2001) for the influence of building height are explained, and the plan density influence is quantitatively assessed. It is shown that the albedo relationship with plan and facade densities obtained with the regular square plot configuration may be considered as a reference for all other configurations, with the exception of the infinite street canyon that shows systematic differences for the lower plan densities. The curves representing this empirical relationship may be used as a sort of abacus for all other geometries while an approximate simple mathematical model is proposed, as well as relationships between the albedo and sky-view factors. © 2012 Springer Science+Business Media Dordrecht.
Bouyer J.,National School of Architecture |
Inard C.,University of La Rochelle |
Musy M.,National School of Architecture
Energy and Buildings | Year: 2011
To streamline the design of the energy efficient buildings, appropriate tools are needed to assess their energy performance taking into account the microclimatic context. Numerical simulation seems to be the most suitable issue, but none tool is dedicate to the direct evaluation of the microclimate influence on the building energy consumption. A complete solution could be to use both CFD and thermoradiative simulation tools complementary with the coupling technique perspective. This paper presents both a developed CFD-thermoradiative coupled simulation tool and a typical application on an urban fragment. The results lead to two kind of observations:Integration of the thermal model of a building in the microclimatic simulation platform enable a quantitative evaluation of the building energy demand regarding different urban design scenarii (e.g. mineralized vs vegetated).Different physical phenomena do not contribute as much in the energy balance and it is important to compute precisely each one to obtain the small scale microclimatic influence. © 2011 Elsevier B.V. All rights reserved.
Garcia Sanchez D.,Ecole des Mines de Nantes |
Lacarriere B.,Ecole des Mines de Nantes |
Musy M.,National School of Architecture |
Bourges B.,Ecole des Mines de Nantes
Energy and Buildings | Year: 2014
Sensitivity analysis plays an important role in the understanding of complex models. It helps to identify the influence of input parameters in relation to the outputs. It can also be a tool to understand the behavior of the model and can then facilitate its development stage. This study aims to analyze and illustrate the potential usefulness of combining first and second-order sensitivity analysis, applied to a building energy model (ESP-r). Through the example of an apartment building, a sensitivity analysis is performed using the method of elementary effects (also known as the Morris method), including an analysis of the interactions between the input parameters (second-order analysis). The usefulness of higher-order analysis is highlighted to support the results of the first-order analysis better. Several aspects are tackled to implement the multi-order sensitivity analysis efficiently: interval size of the variables, the management of non-linearity and the usefulness of various outputs. © 2012 Elsevier B.V. All rights reserved.
Mavromatidis L.E.,National School of Architecture |
Marsault X.,National School of Architecture |
Lequay H.,National School of Architecture
Energy | Year: 2014
In buildings of residential and tertiary sectors, daylight issues primarily respond to increasing needs regarding the occupants' well being and visual confort as well as to the supply of natural light for working, by decreasing energy consumption due to necessary artificial lightning for the internal human activities. Daylight optimization at an early design stage can be referred to a way of designing architectural forms that take advantage of the prevailing urban context, such as existing shadow masks, to achieve a comfortable interior environment while minimizing energy use and reliance on artificial lighting systems. Our past study concluded in the development of EcCoGen, which is a kind of software that belongs to the family of tools based on interactive generative genetic algorithm optimization. The software generates solutions evaluated according to certain criteria, including mainly energy performance issues. Since the energy evaluation is included in the software features, we aimed to enhance software's applicability including energy reduction due to lighting issues via visual comfort optimization. Based on this objective, in this paper we describe a simple methodology to optimize the daylight potential of an architectural form at an early design stage. A numerical approach conducted employing the DIALux 4.5 is presented while a variety of simulation scenarios has been investigated on the basis of Doehlert and Box-Behnken DOE (design of experiments) methods. Our purpose is to develop accurate enough regression models for daylight factor prediction at an early design stage, when the problem's data are not precisely determined (dimension of glazing area, materials, opacities). To validate this statistical forecast system, many simulation scenarios were carried out and the statistical results are in compliance with the numerical simulations. The regression models' results show that the error caused by simplification is acceptable in most conditions, and a lot of coupling calculation is saved. Finally, a formal error analysis for the resulted regression models has been conducted to validate its forecast capacity. As a conclusion the statistical reduction of complex numerical modeling to simple regression models in the form of polynomial equations aims to assist architects and engineers to directly obtain a high precision estimation of their architectural form's daylight potential at an early design stage. © 2013 Elsevier Ltd.
Marsault X.,National School of Architecture
Proceedings of BS 2013: 13th Conference of the International Building Performance Simulation Association | Year: 2013
As simulation researchers in the field of performance-driven architecture, we mainly describe in this paper an interactive genetic algorithm (IGA) especially developed for eco-performance and real-time creative design simulations, associated with a simple and intuitive human machine interface. It has been originally created during the french ANR project EcCoGen dealing with creativity assistance, with the objective of "reducing the gap" between architectural design and current scientific knowledge needed to optimize the building form in early design stage, reduce its energy consumption and bring a real help to the architect's decisions. Copyright © 2011 by IPAC'11/EPS-AG.
Levy-Vroelant C.,Paris 8 University |
Levy-Vroelant C.,National School of Architecture
Housing Studies | Year: 2014
Social housing in France now occupies a central position in political discourse and in public opinion. Accommodating some 17% of households and being an economic driver, its political weight is understandable. But the frailty of the current consensus, based on new production as a solution for solving the "housing crisis," can be approached by analyzing the ruptures which have occurred since the "glorious times"-in terms of both narratives and actions. Using the image of a "new deal" between markets, state, and society and the concept of "general interest" as a framework, the paper first discusses the way the post-liberal shift impacts and challenges housing policies and the place of social housing. The historically constructed narrative of the sector is then presented from its origins up to the shift of the 1970s. Finally, it is argued that the turmoil of the last four decades indicates a shift toward a new repartition between the main stakeholders and a different role for the State-that leaves unsolved not only the housing question, but also the social one. © 2014 Taylor & Francis.