Estudo da eficiência para a ventilação natural dos sheds em hospitais da Rede Sarah / Study of the efficiency of natural ventilation of sheds Sarah network in Hospitals


IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia




Natural ventilation in tropical regions is an efficient design strategy for achieving thermal comfort and reducing energy consumption. The utilization of natural resources and climate conditions improves integration of the building with its surroundings and allows comfort conditions through passive systems of conditioning. The effects of wind on a building are analyzed using computational fluid dynamics (CFD, Computational Fluid Dynamics) or wind tunnel studies. It is important to quantify variables such as speed, pressure, temperature and pressure coefficient. The Sarah Kubitschek Network hospital, designed by João Filgueiras Lima, Lelé, are considered good examples of bioclimatic architecture, due to the passive solutions for comfort, such as the use of sheds, which provide natural lighting and ventilation. These hospitals were built in several Brazilian cities with different climates. This study aims to evaluate the efficiency of natural ventilation of Sarah hospitals located in the cities of Brasília and Belém. These cities were chosen because of the different climate characteristics of the two cities - mild dry and hot humid. The sheds in the hospital of Belem act as wind extractors, while those in in Brasilia Lago Norte hospital was designed as a means of wind catchers. The analysis is done through testing in atmospheric boundary layer wind tunnel. The tests include measurements of air velocity and pressure at several points inside and outside of buildings. The Belém hospital is analyzed in its actual implantation and in the situation where the prevailing incident wind is perpendicular to the facade. The results show that both the number of openings and the shed system in the hospital in Belém, as well as its implantation, provided a higher air speed in indoor environments than the hospital Brasília Lago Norte. The results for the pressure coefficients allow to confirm that for both hospitals studied, the design of natural ventilation takes advantage of the higher pressure areas for positioning of the income and exit of air


ventilação natural natural ventilation hospital hospitais - ventilação

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