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Analyse expérimentale et simulation de la ventilation naturelle mono-façade pour le rafraîchissement des immeubles de bureaux

Abstract : Natural ventilation can contribute to the reduction of the air conditioning demand and to the improvement of thermal comfort in office buildings. In this thesis, a simple configuration of natural ventilation, namely single-sided ventilation, is studied experimentally and by simulation. The main phenomena contributing to air change, thermal effect and wind effect, are discussed. Thus, the validity and applicability of existing models to calculate the ventilation rate is evaluated, by comparing their results with those of experiments conducted in a room with a single opening. Thus, CFD results are compared with experimental ones in order to validate the use of CFD for the study of single-sided ventilation. Guidance on the performance of different types of turbulence models is provided. Results from a turbulence model, namely RANS RSM, are used to establish a new correlation for calculating the ventilation rate. This new correlation shows better performance than previously existing correlations, in particular in the case of leeward opening. Finally, this new correlation is coupled to a dynamic thermal model to evaluate the cooling potential of single-sided natural ventilation in new low-energy office buildings. In particular, we study the reduction of cooling requirements in air-conditioned buildings and the number of hours of discomfort without any air conditioning system. The influence of several parameters is considered: climate, orientation, thermal inertia, rate of glazed area, internal gains and ventilation strategy (daily, night and both daily and night ventilation). Simulations show a significant reduction of cooling demand, between 30 and 90%. Moreover, it is possible to achieve thermal comfort throughout the whole year without using air conditioning in offices, provided that high thermal inertia is used and internal and solar gains are reduced.
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Submitted on : Tuesday, April 5, 2011 - 11:42:42 AM
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  • HAL Id : pastel-00583247, version 1


Marcello Caciolo. Analyse expérimentale et simulation de la ventilation naturelle mono-façade pour le rafraîchissement des immeubles de bureaux. Génie des procédés. École Nationale Supérieure des Mines de Paris, 2010. Français. ⟨NNT : 2010ENMP0061⟩. ⟨pastel-00583247⟩



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