Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Thermodynamic analysis of a solar chimney using meteorological data from Rio de Janeiro and Seropédica cities.
Submission Author:
Erick Oliveira , RJ
Co-Authors:
Erick Oliveira, José Luiz Zanon Zotin
Presenter: Erick Oliveira
doi://10.26678/ABCM.ENCIT2020.CIT20-0297
Abstract
Ventilation is a process that guarantees the control of contaminants, an improved thermal comfort, and an adequate air supply for people, generally, using mechanical blowers or exhaust fans powered by electrical energy. A solar chimney is a device that consists of a closed conduit with a solar energy absorber on, at least, one of its faces. This absorptive material is responsible for heating the air inside the conduit generating an airflow due to natural convection. The present study investigates a solar chimney as an alternative element for indoor ventilation for Rio de Janeiro and Seropédica Cities. The study was performed from data collected at 5 weather stations located within these cities, with hourly measurements between July/18 and July/19. A thermodynamic analysis was carried out to estimate the airflow generated by the chimney for nine different inclined positions, which were tested with real climate data from these cities. In general, inclinations between 60◦ and 70◦ were the ones that provided the highest flow to the solar chimney regardless of the time or month analyzed.
Keywords
Solar Chimney, Solar Energy, Ventilation, Thermal confort
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