186,625 research outputs found
L'esprit hybride, dans le nouvel écoquartier lausannois
No full textLe projet est l'occasion d'innover dans la manière de vivre en ville en proposant un ensemble mixte qui contient des fonctionnalités hybrides. Ce nouveau mode de vie peut être une réponse à un habitat plus durable. Le projet s'inscrit dans un des volumes déjà prévus par le masterplan de l'écoquartier des Plaines-du-Loup. Pour assurer la densification, cet écoquartier est constitué d'un ensemble de plusieurs grandes pièces urbaines. De la même manière, la pièce urbaine traitée sera également un assemblage de plusieurs entités fonctionnelles: une école, des logements étudiants et des appartements familiaux avec des personnes âgées composeront les programmes principaux de cette pièce urbaine. L'objectif? La recherche d'une véritable mixité fonctionnelle et sociale et l'édification d'un morceau urbain actif 24 h/7. Par conséquent, deux entités génératrices avec des fonctionnalités hybrides assureront les relations intergénérationnelles du complexe. Chacune de ces entités fonctionne indépendamment tout en restant un ensemble grâce aux parcours continus et aux relations visuelles. Avec la course du soleil, la forme du volume s'évide du côté Sud. Au Nord, ce dernier propose une barrière entre la rue principale des Plaines-du-Loup et le quartier, alors qu'au Sud il s'ouvre vers l'espace public central. Au final, cette forme offre ainsi des toitures utilisables en tant qu'espaces communs.EAST-COLESO-PBSAR-DCote: 2017.037Archive: MEM.1/1 A4 vertical, archive_informatique_DDGroupe de suivi: Fröhlich Martin (dir. pédagogique); Scartezzini Jean-Louis (prof.); Borges Tiago P. (maître EPFL); Naboni Emanuele (expert)Professeur responsable de l'Enoncé: Scartezzini Jean-Louis (ENAC IIC LESO-PB)Enoncé théorique de master: Energie et émissions grises dans l'architecture contemporaine
Solar Energy and Building Physics Laboratory - Activity Report 2009
No full textThe Solar Energy and Building Physics Laboratory (LESO-PB) works at the forefront of research and technological development in renewable energy, building science and urban physics. It is part of the Civil Engineering Institute (IIC) of the School of Architecture, Civil and Environmental Engineering (ENAC) of the Swiss Federal Institute of Technology (EPFL) in Lausanne, Switzerland. Placed under the responsibility of Prof. Dr Jean-Louis Scartezzini and four group leaders, the laboratory counts about 50 scientists, engineers and technicians. This report presents the teaching, research and dissemination activities for 2009.LESO-P
Validation and preliminary experiments of embedded discomfort glare assessment through a novel HDR vision sensor
No full textLESO-P
A novel occupant-adapted and fuzzy logic-ready visual comfort modelling approach using machine learning algorithms
No full textLESO-P
Ray-tracing simulation of complex fenestration systems based on digitally processed BTDF data
No full textThe implementation of Complex Fenestration Systems (CFS) in the day-to-day life by practitioners, such as lighting designers, architects and façade makers is not an easy task. However, computer design tools can reinforce their usage through the determination of the luminous properties of a building interior prior to its construction or refurbishment. This paper presents a methodology based upon computer daylighting simulations carried out with RADIANCE in which the mkillum procedure was improved in order to render the light distribution due to diffuse daylight and sunlight on the inner surface of a fenestration system by the way of BTDF data. For the sake of standardization, the BTDF data accepted as input may be formatted according to the course of IEA Task 31 “Daylighting in Buildings” (e.g. following Tregenza format).LESO-P
Mixed-Dimensionality Approach for Advanced Ray Tracing of Lamellar Structures for Daylighting and Thermal Control
No full textThe appropriate choice of the type of glazing and glazed area in a façade depends on many factors. They include amongst other criteria: location, orientation, climatic condition, energetic efficiency, usage of the building, required user comfort, and the architectural concept. All requirements cannot be fulfilled at all times and priorities have to be set to find a compromise between occupant comfort, design objective, cost and energetic efficiency. An innovative glazing system combining daylighting, glare protection, seasonal thermal control and clear view was developed [1] and patented by the authors. This design was developed using a novel ray tracing approach to obtain a strongly angular dependent transmission with specific angular distribution. Taking advantage of the changing elevation of the sun between seasons, a seasonal variation is created by a strongly angular dependent transmittance. In this paper we present the mixed dimensionality approach used to achieve a very fast and accurate ray tracing of any lamellar structure that has a two dimensional profile. The originality of the presented Monte Carlo algorithm is the separation of intersection and interaction. Intersections are computed using only the two dimensions of the profile thereby increasing significantly computational speed. Interactions are computed using vector calculus in three dimensions and provide accurate results with very little computational load. With such optimizations, the user interface could be designed to give an instantaneous idea of the light path in the modelled system. The model also calculates an accurate bidirectional transmittance distribution function that is used in a Radiance simulation to obtain a rendering of the daylighting distribution in an office space. Hereby we can compare the daylighting performances of the novel design based on optical microstructures with those of other CFSs. Finally the combination of simulated angular dependent transmittance and Meteonorm data provides an estimate of transmitted energy over the year and proves the efficiency of the presented optical microstructures for dynamic thermal control. The proposed working principles of redirection and angular dependent transmittance are thereby demonstrated. The software provides all the mentioned results in the user interface where the performances of different designs can also be compared, making the optimization process of a profile with a defined objective very intuitive.LESO-P
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