Étude De Comportement D’une Cheminée Solaire En Vue De L’isolation Thermique

Résumé: In our study, we present a technique for ventilation and natural cooling for hot climates. The movement of the air is generated inside the space by a solar chimney. In order to predict the behavior of the chimney, we realized an experimental setup followed by a simulation using the fluent code for a solar chimney with different geometries and two inclinations. An application is running on a piece of size (1m x 1m x 1m) equipped with a solar chimney inclined 45 degrees to the horizontal integrated over the upper part, to predict the ventilation rate. To improve the quality of ventilation, and reach the level of thermal comfort at lower power consumption. We introduced an air-ground. The decrease in temperature at the entrance of the room, we were able to make a design of an air / ground. The main conclusions derived from the parametric study of the proposed system are:  The efficiency of the system increases with the increase of the quantity of solar radiation  The size of the chimney has a significant effect on increasing of the air volume flow.  Optimal heat circulation corresponds to an inclination angle of 45 degrees from horizontal.  The temperature and air velocity at the outlet of the chimney depends on the intensity of solar radiation.  Reducing the outside temperature by a combination of solar chimney and cooling ducts of the air-ground heat exchanger was found quite sufficient to restore comfort conditions.  There is good agreement between the results obtained by our study and those from literature.

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