Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical Determination of the Coefficient of Heat Transfer by Convection between Coverage and External Environment in a Small Solar Chimney
Submission Author:
Daniel Sales Santos Machado , MG , Brazil
Co-Authors:
Janaína de Oliveira Castro Silva, João Arthur Daconti Silva, Cristiana Brasil Maia, Daniel Sales Santos Machado
Presenter: Daniel Sales Santos Machado
doi://10.26678/ABCM.COBEM2017.COB17-0701
Abstract
The growing world demand for energy and concerns about the environmental impacts of energy production has motivated research into alternative sources of energy. In this context, the solar chimney uses a solar radiation to generate a flow of heated air that can be used for a generation of electric energy for a drying of products. An important factor without performance of solar chimneys is a loss of heat to cover the external environment, in this work are proposed two expressions obtained numerically for the coefficient of heat transfer by convection between a cover and the external environment. A small model is used to evaluate the impact of the crosswind (0 to 25m / s) on the performance of solar chimneys.
Keywords
Solar Chimney, Small scaling, CFD, Energetic efficiency, Coefficient of heat transfer by convection
