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Conception thermo-aéraulique de bâtiments multizones. Proposition d'un outil à choix multiple des modèles.

Abstract : Establishing the level of approach of the building professionals, the first chapter applies the systemic analysis to the thermal design of buildings. The consequence of the splitting up of the building makes evident the sub-system thermal zone and lays the foundations of our description of a building. The state of art (and the software offer) is then tackled, revealing some schedule of conditions of our work i.e. the one of a detailed simulation tool and of a tool useful for the design of multizone buildings thermal design, integrating in particular airflow aspects. The chapters II and III about the thermal, humidity and airflow models, recall physical hypotheses, simplifications and models of phenomenons as well as they explain our choices as far as integration is concerned. In addition to the classic simplified models, some detailed models are reviewed, their integration to a reckoning code being now conceivable due to the increase of the available power of today's microcomputers. As far as the compromise between reckoning time and precision, an original conductive model, anamorphosis, is displayed and integrated. Desirous of enlarging the application field beyond the sole temperate climate, particular attention is granted to radiation exchanges between the covering of the building and the outside as well as the airflow transfers. Besides, owing to the airflow patterns coupling with the outside particularly important within a tropical climate, a detailed presentation of airflow calculation models is done. With the integration of wide openings and our choice of a pressure model, the stress is put on the numerical problems thus encountered. Result of the conceptual and physical analysis of the building, the architecture of the software called CODYRUN is covered by chapter IV. The chose of the environment and the development of an interface have been made in order to make easier its subsequently distribution nearby professionals. The calculation process and organisation is then explained. The data structures linked to the building are displayed and turn on to be complex due to the diversity of the situations that can be described (the number of zones, the constitution of the covering of the building, the integration of systems, ...). Besides, owing to the simultaneous taking into account of thermal, airflow and humidity transfers as well as the multiple model innovator feature, it is necessary to detail apart the calculation process of each one of the parts and that of the coupling procedures chosen. The last chapter will deal with illustrations of the software and of our approach of its validation. The process adopted is progressive and confirms the importance of tests in steady state, for each one of the thermal, airflow patterns and humidity models. With successively comparisons with another simulation code, the confrontation with measures and analytic checks, a reliability of the modelling done is obvious. Other illustrations are proposed, i.e. a sensibility analysis to the spatial distribution of the outdoor short wave radiation and the illustration of the numerical interest of the selective use of models, in the case of the indoor convection.
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Harry Boyer. Conception thermo-aéraulique de bâtiments multizones. Proposition d'un outil à choix multiple des modèles.. Mécanique [physics.med-ph]. INSA de Lyon, 1993. Français. ⟨tel-00757022⟩

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