D. Bigot

University of Reunion Island · Laboratory of Physics and Mathematical Engineering for Energy and the Environment (PIMENT)

Adopting a multiscale approach is crucial for optimizing urban and building performance, prompting inquiries about the link between a technology’s local efficiency (building scale) and its broader impact (city-wide). To investigate this correlation and devise effective strategies for enhancing building and city energy performance, we experimentally...

This paper addresses the plastic waste management challenge by proposing a sustainable solution for the building sector. The proposed solution uses Loose-Fill Plastic Waste (LFPW) as a thermal insulation material, the world’s first in plastic waste recovery. To investigate the potential of this new path, an experimental study was conducted on test...

In the context of global warming, Phase change materials (PCMs) arise a growing interest in the scientific and industrial communities because it fits very well with the policy of reducing energy consumption that many countries must face. They are natural or synthetic substances with the peculiarity of storing and releasing thermal energy through th...

This study is being conducted to evaluate the effects of Phase Change Materials (PCM) on thermal comfort in buildings in Reunion Island. Experimental and numerical approaches are used to determine the criteria for the integration of bio-based PCM. A full-scale platform is divided into two rooms, where a layer of PCM is applied to one surface of the...

This study is being conducted to evaluate the effects of Phase Change Materials (PCM) on thermal comfort in buildings in Reunion Island. Experimental and numerical approaches are used to determine the criteria for the integration of bio-based PCM. A full-scale platform is divided into two rooms, where a layer of PCM is applied to one surface of the...

T.D.G.S., "Tubular Daylight Guidance Systems", are natural lighting processes based on the transport of light. In 1990, they were judged by Littlefair as the most innovative technology in daylighting [1]. From 1982 to 2020, this paper is a state of the art on the different processes of tubular daylight guide systems. The keywords used to carry out...

T.D.G.S., “Tubular Daylight Guidance Systems”, are natural lighting processes based on the transport of light. In 1990, they were judged by Littlefair as the most innovative technology in daylighting [1]. From 1982 to 2020, this paper is a state of the art on the different processes of tubular daylight guide systems. The key words used to carry out...

The "VCP Lsa" is a specific kind of green-roof specially developed for light-weight structures with steep slopes under tropical climates. The "VCP Lsa" acronym stands for Vegetalized Complex Partition type Ligneous over Structure and Air gap. Comparatively to a traditional extensive green roof the VCP Lsa is easy to install and allows to reach an h...

This paper focuses on the part of Tubular Daylight Guide Systems (TDGS): the Mirrored Light-Pipe (MLP). MLP is part of the multiple specular reflection conveyors. They allow daylight to be transported and distributed in dark rooms far from traditional openings while limiting heat transmission. It involves collecting, concentrating, and diffusing su...

Windows are central in architecture and they play a significant role in the energy consumption of buildings, particularly in hot climates, where overheating is a critical issue. Innovative glazing technologies, like thermochromic (TC) glazing, could help to overcome those issues. This article aims to identify both the influence and the importance o...

Windows are central in architecture and they play a significant role in the energy consumption of buildings, particularly in hot climates, where overheating is a critical issue. Innovative glazing technologies, like thermochromic (TC) glazing, could help to overcome those issues. This article aims to identify both the influence and the importance o...

Windows are central in architecture and they play a significant role in the energy consumption of buildings, particularly in hot climates, where overheating is a critical issue. Innovative glazing technologies, like thermochromic (TC) glazing, could help to overcome those issues. This article aims to identify both the influence and the importance o...

In a concerning global energy context, the construction industry must be able to respond both in terms of energy management and the comfort of its buildings’ occupants. In this context, innovative devices using daylighting can provide an obvious answer. The Tubular Devices Guide Systems (TDGS) are innovative daylighting processes based on light tra...

Les dispositifs d’éclairage naturel innovants constituent des procédés techniques à haute performance énergétique, pouvant être avantageusement utilisés dans le bâtiment, en particulier à l’échelle locale où le gisement solaire extérieur est très abondant. L’objectif de la thèse est d’étudier le comportement de composants complexes du type vitrages...

The use of phase change materials (PCMs) as a building integrated thermal storage may contribute to improving building energy performances. This article focuses on the integration of PCMs in the roof with a non-ventilated air layer, in order to assess thermal performances of a dedicated test cell, especially for thermal comfort. An experimental equ...

This paper deals with the empirical validation of a building thermal model using a phase change material (PCM) in a complex roof. A mathematical model dedicated to phase change materials based on the heat apparent capacity method was implemented in a multi-zone building simulation code, the aim being to increase understanding of the thermal behavio...

This article deals with a new configuration of a complex roof using a phase change material (PCM) installed on a dedicated test cell. For the first time and in field conditions, an experimental device using phase change material was set up at Reunion Island, location having a tropical and humid climate. Results show that in the tested configuration...

CODYRUN is a multi-zone software integrating thermal building simulation, airflow, and pollutant transfer. A first question thus arose as to the integration of indoor lighting conditions into the simulation, leading to a new model calculating natural and artificial lighting. The results of this new daylighting module were then compared with results...

In Reunion Island, many buildings have been equipped with PV panels on their roofs in order to produce electricity. These PV systems were built to increase the penetration of renewable energies in the public electricity grid and so reduce greenhouse effect gases emissions. This type of installation was designed just in order to produce electricity...

Buildings in Reunion Island have different thermal performances so the thermal energy storage should be enhanced. Using phase change materials in the building envelope could be a solution. These materials are able to increase the low thermal mass of lightweight constructions in order to improve human comfort, maintaining the building ambient therma...

This article deals with a numerical model of the thermal behavior of a building roof equipped with phase change materials (PCM). The study puts in evidence the first results of the proposed model based on the apparent heat capacity method. A backward Euler scheme and a finite difference discretization method have been used. The model was integrated...

In this paper, the electrical energy generation by photovoltaic (PV) arrays is discussed for three cities in the island of Reunion (the Republic of France) located in Indian Ocean. Each PV array has different orientation as it is placed at different part of the roof of a residential house that pretends to be a sustainable building. The electrical e...

This article deals with the optimization and validation of a thermal model of photovoltaic panels integrated to buildings. The PV thermal model is implemented in the building simulation code ISOLAB and have already been the subject of previous works. The optimization is made by using the generic optimization program GenOpt. First, these two program...

The aim of this paper is to briefly recall heat transfer modes and explain their integration within a software dedicated to building simulation (CODYRUN). Detailed elements of the validation of this software are presented and two applications are finally discussed. One concerns the modeling of a flat plate air collector and the second focuses on th...

This paper deals with the experimental evaluation of a roof-mounted multi-reflective radiant barrier (MRRB), installed according to the state of the art, on a dedicated test cell. An existing experimental device was completed with a specific system for the regulation of the airflow rate in the upper air layer included in a typical roof from Reunion...

As in Reunion Island, France, around 61% of electricity is produced by using coal and fuel oil with high greenhouse emissions, it is beneficial to the environment to produce electricity from solar energy. Therefore, there is a large push to generate electricity from solar energy by use of photovoltaic (PV) arrays. However, it is important to have h...

This thesis presents a thermal and electrical modelling of PV walls integrated to buildings. The particularity of this model is that the heat transfer that occurs through the panel to the building is described so that both building and PV thermal modelling are fully coupled. This has the advantage of allowing the prediction of the impact of PV inst...

http://www.intechopen.com/source/pdfs/19415/InTech-Heat_transfer_in_buildings_application_to_solar_air_collector_and_trombe_wall_design.pdf

This paper deals with a simplified model of radiative heat transfer in building enclosures with low emissivity walls. The approach is based on an existing simplified model, well known and used in building multizone simulation codes, for the long wave exchanges in building enclosures. This method is simply extended to the case of a cavity including...

This paper presents initial values of global and diffuse luminous efficacy at Saint-Pierre (Reunion Island). Firstly, data used were measured for a period of 6 months, from February to June 2008. During this period, all defined day-types have been studied (clear, cloudy and intermediate). Generally, the meteorological database of Reunion does not c...

Available from: http://www.intechopen.com/books/solar-collectors-and-panels--theory-and-applications/thermal-performance-of-photovoltaic-systems-integrated-in-buildings-

This paper presents a sensitivity analysis of a thermal model of PV panels integrated in buildings. An integrated thermal model has indeed been built, with the specificity of considering the photovoltaic panels (PV panels) and the associated wall as a solar protection of the building. The specific climate of Reunion Island was taken into account, w...

CODYRUN is a software for computational aeraulic and thermal simulation in buildings developed by the Laboratory of Building Physics and Systems (L.P.B.S). Numerical simulation codes of artificial lighting have been introduced to extend the tool capacity. These calculation codes are able to predict the amount of light received by any point of a giv...

This article deals with both an experimental study and a numerical model of the thermal behaviour of a building whose roof is equipped with photovoltaic panels (PV panels). The aim of this study is to show the impact of the PV panels in terms of level of insulation or solar protection for the building. Contrary to existing models, the one presented...