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ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Energy and exergy analysis inside a trapezoidal solar chimney from shipping containers to improve thermal comfort
Submission Author:
Felipe Person Malta , SP , Brazil
Co-Authors:
Cyro Albuquerque Neto, Silvio de Oliveira Junior, Jurandir Itizo Yanagihara
Presenter: Felipe Person Malta
doi://10.26678/ABCM.ENCIT2016.CIT2016-0461
Abstract
Solar chimney is a technique widely used to generate clean energy and/or improve thermal comfort inside buildings. Shipping containers are low cost and suitable to be turned into habitation, but the thermal comfort is impaired. The aim of this paper is to apply exergy balance on a solar chimney, from a shipping trapezoidal container wall, in order to improve the thermal comfort. The energy and exergy balance relates the first law of thermodynamics with exergy efficiency and exergy destroyed. The heat loss due reflection, radiation and convection were very close, ranging from 4 to 8% of the heat supplied. However, the heat effectively provided to the fluid is much smaller, being the average of 2%. Meanwhile, the heat lost by the insulation is very low and may even be considered negligible. The exergy destroyed, that has a behavior of quadratic function, combined with the behavior of physical exergy, caused a linear decrease of exergetic efficiency of the chimney, the opposite fact to the linear growth in the thermal efficiency. The combination of these two events shows that it would be ideal to use this chimney at a specific point, which would be in balance both efficiencies for optimization of the apparatus.
Keywords
Solar Chimney, Natural Convection, Exergy Analysis, Shipping Container, thermal comfort, Solar Chimney, Natural Convection, Exergy Analysis, Shipping Container, thermal comfort
