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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
DEVELOPMENT OF COMPUTATIONAL MODELING OF A SOLAR CHIMNEY ATTACHED TO A ROOM FOR NATURAL VENTILATION
Submission Author:
Marta Leao , RS , Brazil
Co-Authors:
Marta Leao, Liércio Isoldi, Luiz Alberto Oliveira Rocha, Emanuel da Silva Diaz Estrada, Elizaldo dos Santos
Presenter: Marta Leao
doi://10.26678/ABCM.ENCIT2020.CIT20-0540
Abstract
The present work aims to develop a computational model for the analysis of turbulent flow in an inclined passive wall solar chimney attached to a room, where solar radiation affects this wall, heating the air and generating its movement inside the chimney and consequently in the attached room. The flow is admitted turbulent, incompressible, with heat transfer by natural convection and it is analyzed in the transient regime in a two dimensional domain. The mass conservation, momentum and energy equations are numerically solved by the finite volume method using the FLUENT software. The standard k-ε turbulence model was used to reproduce the airflow turbulence in the chimney. The simulations were carried out using a constant heat flux of 1000 W/m², absorber wall height Ha = 2.5 m and chimney inclination of 4º with the vertical direction. An investigation of grid and time-step sensibility was performed and independent grid and time-step were used to obtain results of mass flow rate in the attached room. Results obtained with the present numerical model were in close agreement with those obtained in the literature.
Keywords
Solar Chimney, natural ventilation, ANSYS/Fluent, Numerical investigation
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