Browsing by Author "Rouault, Fabien"

Now showing 1 - 7 of 7
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    Analysis of energy data of existing buildings in a University Campus
    (2018) Aguayo-Ullao, Eduardo; Valderrama Ulloa, Claudia; Rouault, Fabien
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    Characterization of Fatty Acids as Biobased Organic Materials for Latent Heat Storage
    (2021) Duquesne, Marie; Mailhe, Clement; Doppiu, Stefania; Dauvergne, Jean-Luc; Santos-Moreno, Sergio; Godin, Alexandre; Fleury, Guillaume; Rouault, Fabien; del Barrio, Elena Palomo
    This work aims to characterize phase change materials (PCM) for thermal energy storage in buildings (thermal comfort). Fatty acids, biobased organic PCM, are attractive candidates for integration into active or passive storage systems for targeted application. Three pure fatty acids (capric, myristic and palmitic acids) and two eutectic mixtures (capric-myristic and capric-palmitic acids) are studied in this paper. Although the main storage properties of pure fatty acids have already been investigated and reported in the literature, the information available on the eutectic mixtures is very limited (only melting temperature and enthalpy). This paper presents a complete experimental characterization of these pure and mixed fatty acids, including measurements of their main thermophysical properties (melting temperature and enthalpy, specific heats and densities in solid and liquid states, thermal conductivity, thermal diffusivity as well as viscosity) and the properties of interest regarding the system integrating the PCM (energy density, volume expansion). The storage performances of the studied mixtures are also compared to those of most commonly used PCM (salt hydrates and paraffins).
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    Experimental investigation and modelling of a low temperature PCM thermal energy exchange and storage system
    (2014) Rouault, Fabien; Bruneau, Denis; Sébastian, Patrick; Lopez, Jérome
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    Feasibility study of the application of a cooling energy storage system in a chiller plant of an office building located in Santiago, Chile
    (2019) Venegas-Troncoso, Tomas; Ugarte-Larraguibel, Gaspar; Vasco, Diego A.; Rouault, Fabien; Perez, Rodrigo
    Energy consumption of commercial buildings has increasingly gained attention worldwide, because of its significant electricity consumption and peak power demand. Chiller plants are mostly used in commercial buildings to generate cold water for air conditioning. However, because the chiller plants and the refrigeration systems tend to be oversized with respect to their critical design load conditions, they certainly lead to higher energy consumption than a properly sized chiller plant. One possible way to reduce the power consumption and redistribute energy use is through the integration of latent heat thermal energy storage (LHTES) systems with air-cooling system in buildings. In the present work, a LHTES system based on ice is implemented along with a conventional chiller system of an existing commercial building located in Santiago, Chile. Different strategies of operation in a design day are assessed by computational simulation with EnergyPlus. A hybrid operation strategy is evaluated for the hottest summer week, and the results of the cooling loads are obtained. Finally, we founded that the implementation of a LHTES reduces by 7.8% the cooling energy consumption of the cooling system during the analyzed period. (C) 2019 Elsevier Ltd and IIR. All rights reserved.
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    Indoor Environmental Quality in Latin American Buildings: A Systematic Literature Review
    (2020) Valderrama Ulloa, Claudia; Silva Castillo, Lorena.; Sandoval Grandi, Catalina.; Robles Calderón, Carlos.; Rouault, Fabien
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    Multiobjective optimization of an air-phase change material heat exchanger for free cooling in a single-family house
    (2020) Rouault, Fabien; Bruneau, Denis; Sebastian, Patrick; Lopez, Jerome
    Free cooling systems based on phase change materials (PCM) are a possible alternative to air conditioning systems for summer comfort in buildings. However, the performance of such cooling systems is closely related to the climatic conditions and building configurations to be cooled. The objective of this work is to present an application of multiobjective optimization of an air cooling system using PCM at the preliminary stage of the design process. A dynamic thermal model simulating the thermal behaviour of an air-PCM heat exchanger is therefore presented and then coupled to the EnergyPlus? software for the dynamic thermal simulation of the system. Finally, a first application of the optimization is presented to define a set of optimal configurations of the systems maintaining summer comfort in the house NAPEVOMO, minimizing both the initial cost of PCM and energy use of the fan.
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