Emmanuel Bozonnet

Emmanuel Bozonnet
La Rochelle Université · Laboratoire des Sciences de l’Ingénieur pour l’Environnement - LaSIE

PhD

About

99
Publications
33,854
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1,341
Citations
Citations since 2017
28 Research Items
961 Citations
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
Additional affiliations
January 2011 - present

Publications

Publications (99)
Article
Urban courtyards are well known for their potential thermal performances in vernacular urban morphology. Furthermore, in a more general approach considering various cities and locations, new building uses, and climate changes, a correct courtyard design requires an accurate understanding of the complex interactions between buildings and their surro...
Article
Full-text available
The global effects of climate change will increase the frequency and intensity of extreme events such as heatwaves and power outages, which have consequences for buildings and their cooling systems. Buildings and their cooling systems should be designed and operated to be resilient under such events to protect occupants from potentially dangerous i...
Article
In response to urbanization and global warming, which amplify heatwave effects and might lead to urban heat stress, this paper proposes a practical approach to characterize the local microclimate at the neighborhood scale. In this approach, the local urban climate is described using suitable indicators, to support the ecodistrict design process or...
Article
Full-text available
The aim of this study is to demonstrate the requirement to integrate the urban microclimate to predict the energy needs of buildings. To do this, an integrated approach in TRNSYS software was developed and compared with existing experimental results of a street canyon. Afterwards, a case study was carried out in the case of a street canyon located...
Article
Full-text available
Prolonged and/or extreme heat has become a natural hazard that presents a significant risk to humans and the buildings, technologies, and infrastructure on which they have previously relied on to provide cooling. This paper presents a conceptual model of a resilient cooling system centred on people, the socio-cultural-technical contexts they inhabi...
Chapter
Full-text available
In order to improve the prediction of the building’s energy performance, it has become necessary to evaluate their interactions with the urban microclimate. Currently, there are few tools allowing to simulate the buildings energy consumption taking into account the impact of the urban microclimate with a satisfactory precision and acceptable comput...
Article
Full-text available
We developed and studied key performance indexes and representations of energy simulation heat fluxes to evaluate the performance of the evaporative cooling process as a passive cooling technique for a commercial building typology. These performance indexes, related to indoor thermal comfort, energy consumption and their interactions with their sur...
Conference Paper
The aim of this study is to show the possibility of carrying out an integrated modelling in the TRNSYS software with a zonal approach allowing to take into account the thermal, hydric, aeraulic and radiative phenomena at the microclimatic scale of a street canyon. To evaluate the validity of this approach, a comparison with existing experimental re...
Article
To improve the prediction of the building’s energy performance, it has become necessary to evaluate their interactions with the urban microclimate. This study aims to propose an integrated model in the TRNSYS software with a simplified approach to assess building energy demand, including microclimate interactions on buildings. This model is based o...
Article
Full-text available
It is now well-known that the frequency, intensity and duration of heatwaves will strongly increase along the XXIth century, which introduces the urban built environment resilience as a new paradigm. In Paris, the intense 2003 heatwave demonstrated that warm urban temperatures could result in serious adverse health issues. Temperatures were particu...
Conference Paper
Full-text available
The study focuses on the development and illustration of the interactions between urban microclimate and district scale building simulation through a micro co-simulation approach. A zonal microclimatic model developed to serve the needs of the district scale is coupled with an Urban Building Energy Model aiming a twofold objective: enhancement of t...
Article
Full-text available
Highly- and retro-reflective materials have recently been investigated and proposed as a new urban coating solution to reduce the so-called urban heat island effect. The present study aims at providing a numerical model for assessing inter-buildings solar reflections when these materials are applied to urban canyon's surfaces. The proposed model in...
Conference Paper
Full-text available
In this study a simplified approach for urban microclimate modelling by using TRNSYS 17 software has been developed and validated. This approach has the advantage to model the microclimatic phenomena in order to consider them in a dynamic building thermal simulation software without going through time-consuming CFD calculations, and with a satisfac...
Book
Full-text available
https://link.springer.com/book/10.1007/978-3-030-10856-4#toc This peer-reviewed edited volume consists of seventeen titles. It discusses major environmental issues and challenges which threaten our future. These include climate change impact, environmental deterioration, increasing demand for energy and new approaches for alternative renewable en...
Article
In this paper, we propose a practical approach for decision-making regarding passive cooling design for buildings in dense urban contexts. For non-cooled buildings under temperate climates, assessment of summer thermal discomfort determines the usual passive cooling design together with fossil energy and GHG savings at earth scale. However, passive...
Conference Paper
Full-text available
Le microclimat urbain influe sur les besoins énergétiques et le potentiel de ventilation naturelle des bâtiments. Implicitement, les bâtiments affectent leur environnement, par la création des masques solaires et des circulations aérauliques particulières. Dans ce contexte, l’objectif de cette étude est de réaliser une modélisation intégrée dans le...
Article
The design of low-rise commercial building envelopes is mainly driven by functional large volumes, and low-cost and lightweight materials that often present weak thermal performances. Thermal and visual comfort is a key parameter for these buildings' purpose, but poor envelope designs have significant consequences on the high-energy demand for HVAC...
Article
Full-text available
The experimental study of vegetated façades and their hygrothermal effects on heat loads is essential. Indeed, the complexity of thermal fluxes and airflows taking place within green walls modules under extreme climatic conditions is to date not mastered. In addition, phenomena related to buoyancy, street confinement, condensation, frost and sorpti...
Article
This article present the results obtained an experiment carried out to measure the thermal impacts of green walls on buildings. The experiment deals with full monitoring of a green wall set up on a scaled-down experimental mockup of buildings located in La Rochelle city. Results underline the positive effect of green walls in summer and shows moder...
Conference Paper
Full-text available
The goal of this study is to bring out the efficiency of district landscaping on local urban heat island mitigation. Two cooling strategies at the district scale are evaluated through the coupled effect computation of microclimate and building energy demand: vegetation (trees, green walls and roofs) and high albedo values (cool roofs and façades)....
Article
The single family home market is facing increasing challenges in managing environmental issues. The required objective of building energy performance can be achieved by limiting extra cost, integrating building design, and using the most appropriate and readily available materials. However, standard computations, such as the French building energy...
Article
A hygrothermal model of green walls and a model of mass flows in street canyons have been proposed and implemented in a building simulation program (TRNSYS). The coupled models allow the study of the hygrothermal interaction of green walls at the interface of the detailed building model and the urban microclimate of the street. Its use highlights t...
Conference Paper
Full-text available
Le projet ANR COSIMPHI (CO-Simulation Multi-Physique Interactive - ANR-13-VBDU-0002) s’intéresse à la question de la modélisation multi-physique par la co-simulation pour concevoir des bâtiments en traitant simultanément les ambiances acoustique, visuelle et thermique ainsi que l’efficacité énergétique, environnementale et économique. Cette approch...
Article
Abstract Since some years, dense cities and compact buildings are promoted as sustainable and energy efficient designs. Nevertheless, urban planning strategies should take into account the interactions between buildings and the microclimate because the Urban Heat Island (UHI) phenomenon can increase the cooling load of buildings and is strongly inf...
Conference Paper
Full-text available
Considering increasing constraints from building energy performance regulations, such as EPBD for Europe, building design is bounded to become more and more of an integrated process. The dissemination of such complex approaches can be a key issue for the building sector especially for the single house market. The proposed approach aims to overcome...
Article
This study carried out in late 2013 for the French Ministry of Ecology, Sustainable Development and Energy (MEDDE), aims primarily to make a situational analysis of the awareness and consideration level of the UHI constraints, by organizations that influence on the location and the design of building hosting sensitive people to high temperature (nu...
Conference Paper
Full-text available
Afin de réduire la consommation énergétique des bâtiments en France, la réglementation thermique actuelle (RT2012) impose un renforcement de l’isolation thermique et une diminution de la perméabilité de l’enveloppe. Ainsi, la part de la ventilation dans la consommation énergétique des nouveaux bâtiments s’est considérablement accrue ces dernières a...
Article
Full-text available
This paper presents the design and the results of a reduced-scale experimental bench to study the effect of green roofs and green facades on local urban microclimate. An analysis of experimental data was carried out on three street canyons: one reference street, one street between two buildings with green roofs and one with a green wall to the west...
Article
In this paper, a newly developed heat and moisture transfer model for green envelopes is integrated in a transient building simulation program (TRNSYS) in order to investigate its dynamic performances coupled with a multizone building code. On the one hand we focus on the understanding of the coupled heat and mass transfers between green envelopes...
Article
As of 2007, more than half of the world's population now lives in urban areas and their activities has led to an increase in building energy demand, notably in summer. The higher temperatures in densely built areas are mainly due to landscaping and anthropogenic heat fluxes such as air conditioning systems. Acting on urban landscaping, building den...
Conference Paper
Full-text available
Passive cooling solutions are almost never considered to ensure thermal comfort during summer of commercial low-rise buildings. The present study aims at evaluating the indoor temperature by using different approaches to account for thermal stratification and analysing the potential of natural ventilation to ensure thermal comfort in the occupied z...
Conference Paper
Full-text available
Résumé - Les bâtiments commerciaux de faible hauteur sont souvent caractérisés par de faibles performances énergétiques dues aux transferts thermiques importants au niveau de la toiture et du sol. Dans cet article, le comportement d’un bâtiment de « référence » a été modélisé afin d’étudier les paramètres principaux qui impactent sur la demande d'é...
Technical Report
Full-text available
Dense city, green city, realistic gamble?The role of vegetation in sustainable urban development: an approach by the climatic, hydrologic, energy and ambiances stakes.Urban sprawl increases the artificial surfaces to the detriment of natural ones. However, with the increase of urban population it is necessary to find compromises, and introducing mo...
Conference Paper
Full-text available
Afin d’assurer le confort thermique estival, les techniques passives de rafraîchissement sont rarement considérées pour les bâtiments commerciaux de faible hauteur. L’objectif de cette étude est d’évaluer la température intérieure en utilisantdifférentes approches pour prendre en compte la stratification thermique et d’analyser le potentiel de la v...
Article
Full-text available
Commercial low-rise buildings are often characterized by weak energy performances, and heat transfers through roof and ground are prevalent. The roof design and its opening system is a key factor of the thermal performance. Skylights and radiative properties of roof coating have a direct impact on solar gains, thermal losses and natural ventilation...
Conference Paper
Full-text available
Few studies focus on commercial low-rise buildings which are often characterized by low-cost constructions materials and weak energy performances.For these large volumes,the heat transfers with the roof and the ground are prevalent. In this article, we show how the analysis of heat transfers through both the roof and the ground can achieve their th...
Conference Paper
Full-text available
Commercial low-rise buildings are characterized by large volumes and prevalence of heat transfers with the ground and the roof. The inertia of these lightweight structures is mainly given by the slab/ground. Heat transfer from/to the ground is an important term of the energy balance. The present study aims to assess the importance of both the one-d...
Conference Paper
Full-text available
Green roofs and green walls have several benefits on buildings and cities. They are most often used for water management and for the aesthetical value they provide to the urban environment. These green coatings have a positive impact on the sustainability of building materials. They can improve building energy performance and reduce the amplitude o...
Article
Full-text available
The urban microclimate is due to complex physical interactions with the contribution of water balance, thermo-radiative exchanges and airflows. In this paper, we present and discuss modeling of heat island effects and mitigation techniques in order to give consistent results considering different time and space scales, and different fluxes (heat, w...
Chapter
The chapter presents a set of exemplary case studies where the cool materials were implemented and the impact monitored.
Article
a b s t r a c t Energy performance of air conditioned buildings and summer comfort can be improved with high solar reflectance and high emittance of building envelopes. Widely used for roofs, this technique known as cool roof, has a direct impact on the external surface temperatures peaks which reduces both heat transfer to the building and to the...
Article
This paper describes a dynamic model of transient heat and mass transfer across a green roof component. The thermal behavior of the green roof layers is modeled and coupled to the water balance in the substrate that is determined accounting for evapotranspiration. The water balance variations over time directly impact the physical properties of the...
Article
In this study, we describe a novel method for evaluating building heating demand based on a statistical approach. Our aim is to support integrated building design by providing fast modeling with accuracy close to that of dynamic simulations. A general parametric model encompassing overall building design is proposed based on the analysis of heat tr...
Data
Full-text available
The refurbishment of building roofs with cool selective coatings is already defined by some standards. Impacts on urban heat island (UHI) and thermal performance of buildings are well identified. In France, most of the developments on building thermal performances are focused on the building envelope insu-lation, especially for the winter energy pe...
Article
a b s t r a c t The refurbishment of building roofs with cool selective coatings is already defined by some standards. Impacts on urban heat island (UHI) and thermal performance of buildings are well identified. In France, most of the developments on building thermal performances are focused on the building envelope insu-lation, especially for the...
Article
In the consideration of building energy performance and urban climate models, irradiation is a key parameter. From the city scale to the detailed building interchange, different approaches and models with various levels of details are explained in this review, and their scope and usefulness considered. The first part of the study deals with solar a...