Windows are major elements in the construction of buildings. They can significantly contribute in the heat exchange between the outside and inside environments of a building. The main aim of this work is to estimate the thermal performance of a building interior due to heat flow through a window that also contributes to room ventilation. For this purpose, we studied numerically the coupling of natural convection heat transfer with the radiation of the glass surfaces that occur in a supply-air Paziaud window. The latter is composed of three panes of glass separated by ventilated U-shaped air gaps. The numerical solution is obtained using a finite volume method based on the SIMPLER algorithm for the treatment of velocity-pressure coupling. Concerning the radiation exchange, we consider that the working fluid is transparent, so only the solid surfaces contribute to the radiation exchange and assumed to be diffuse-gray. The effects of Rayleigh number, aspect ratio, and blind geometry on the convective and radiation heat transfer are examined in detail.
Modelling of Natural Convection with Radiation in a Triple-Glazed Ventilated Window
Journal of Thermophysics and Heat Transfer ; 29 , 4 ; 795-804
01.10.2015
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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