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ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL INVESTIGATION OF THE INFLUENCE OF AN AUXILIARY WALL IN THE PERFORMANCE OF A SOLAR CHIMNEY CONNECTED TO A ROOM FOR NATURAL VENTILATION
Submission Author:
Elizaldo dos Santos , RS , Brazil
Co-Authors:
Tarciso Claudino, Liércio Isoldi, Emanuel da Silva Diaz Estrada, Luiz Alberto Oliveira Rocha, Sylvie Lorente, Marta Leao, Elizaldo dos Santos
Presenter: Elizaldo dos Santos
doi://10.26678/ABCM.ENCIT2022.CIT22-0134
Abstract
The present work aims to investigate the influence of an auxiliary wall inserted near the lateral wall of a room, which is connected to a passive inclined wall solar chimney device. Turbulent air flow is assumed incompressible, with heat transfer by natural convection and evaluated in the transient regime and two-dimensional domain. The time-averaged conservation equations of mass, momentum and energy are numerically solved using the finite volume method. The k-ε closure model is used to tackle the turbulence modeling. In addition, for the simulations, a constant heat flux of 1000 W/m² is used and the dimensions of the chimney are kept constant. The studied computational model was verified with previous results of literature for a case without auxiliary wall, which is the reference in the present investigation. Results demonstrated that the insertion of an auxiliary wall led to a decrease of mass flow rate in the system, regardless of the height of the inserted wall. In spite of that, results demonstrated that the solar chimney can work for natural ventilation of the room, even for a building composed of obstacles or heat sources, since the mass flow rate in the domain is not completely restricted in any studied case.
Keywords
Numerical simulation, Auxiliary Wall, Geometrical Investigation, Solar Chimney, turbulent flows
