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Modélisation dynamique d’un dispositif de stockage par chaleur sensible intégré à un système énergétique

Abstract : In recent years, policies to promote energy efficiency have been introduced in response to European and International regulatory obligations. Thermal Energy Storage has proven to be a technology that improves energy efficiency, particularly for the air conditioning, heating and domestic hot water utilities in buildings. Among the existing types, sensible heat storage is the oldest and most widespread on the market. The integration of the storage tank into energy installations may be tricky in both the design and operation phases of these installations. Moreover, the annual (or seasonal) energy consumption of the building's technical systems and equipment should be evaluated. To meet all these requirements, dynamic modeling and simulation of energy components and systems becomes essential. The work of this thesis presents a dynamic modeling and simulation approach of a sensible heat water storage tank which respond to the following particular constraints: To ensure a fine modeling based on the resolution of the Navier-Stokes equations of a component – the storage tank – in which the flow and transfer mechanisms are complex, and to carry out a dynamic modeling and simulation, with reasonable computational time, of a thermal energy system associating various technical components of a circuit and compatible with the usual practices of the specialized system design offices. Thus, the carried out work combines a detailed analysis of the dynamic behavior of the storage tank through the development of a CFD model, the development of a reduced model from the previous CFD model that allows the construction of temperature dynamic fields and finally a Modelica modeling adapted to the simulation of a complex energy system. In the different phases of this study, the results from the simulation are compared to the results deduced from various experimental works. The validation of the approach following this comparison between calculations and experimental results makes it possible to consider the application, of the presented tools, in technical projects and in particular the project “PV cooling” for buildings air conditioning with a photovoltaic solar resource, a project that is carried out in parallel with this thesis by the industrial players supporting this research.
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Elie Terzibachian. Modélisation dynamique d’un dispositif de stockage par chaleur sensible intégré à un système énergétique. Thermique [physics.class-ph]. Conservatoire national des arts et metiers - CNAM, 2017. Français. ⟨NNT : 2017CNAM1129⟩. ⟨tel-02896889⟩

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