Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Computational Fluid Dynamics applied in a solar chimney analysis
Submission Author:
Filipe Alcântara Soares , RJ
Co-Authors:
Filipe Alcântara Soares, Priscila Araujo, André Luiz Tenório Rezende
Presenter: Filipe Alcântara Soares
doi://10.26678/ABCM.COBEM2017.COB17-0241
Abstract
Computational fluid dynamics was used to simulate solar chimney power plants and investigate modeling techniques. The solar chimney combines three known elements: solar air collector, tower and wind turbine. This device uses the solar radiation to generate a hot airflow and this is usually used to drive wind turbines coupled to an electric generator. Large solar chimneys are necessary for be economically competitive with conventional power plants, however small chimneys can be used for other applications, for example drying agricultural products. In order to analyze the turbulent flow in a small solar chimney in this paper, the Finite Volume Method was adopted to solve the system of equations which describe the two-dimensional steady state airflow. The purpose of this work is to verify the influence of the ground in the numerical analysis of airflow in a small solar chimney using three turbulence models: standard k-ε, standard k-ω and the SST k-ω. The simulations are compared with experimental data available in the literature and with another numerical analysis that used the k-ε model. The results showed that the use of the ground as an energy storage layer has not major influence on the temperature and velocity profile of the airflow and for the approach seen in this paper it may be negligible in the numerical analysis.
Keywords
Solar Chimney, Numerical Study, Turbulence Models
