masterThesis
Análise de componentes arquitetônicos para potencialização da ventilação natural com ênfase em captadores de vento
Fecha
2011-03-01Registro en:
ARAÚJO, Carla Varela de Albuquerque. Análise de componentes arquitetônicos para potencialização da ventilação natural com ênfase em captadores de vento. 2011. 130 f. Dissertação (Mestrado em Conforto no Ambiente Construído; Forma Urbana e Habitação) - Universidade Federal do Rio Grande do Norte, Natal, 2011.
Autor
Araújo, Carla Varela de Albuquerque
Resumen
The building envelope is the principal mean of interaction between indoors and environment,
with direct influence on thermal and energy performance of the building. By intervening in
the envelope, with the proposal of specific architectural elements, it is possible to promote the
use of passive strategies of conditioning, such as natural ventilation. The cross ventilation is
recommended by the NBR 15220-3 as the bioclimatic main strategy for the hot and humid
climate of Natal/RN, offering among other benefits, the thermal comfort of occupants. The
analysis tools of natural ventilation, on the other hand, cover a variety of techniques, from the
simplified calculation methods to computer fluid dynamics, whose limitations are discussed in
several papers, but without detailing the problems encountered. In this sense, the present
study aims to evaluate the potential of wind catchers, envelope elements used to increase
natural ventilation in the building, through CFD simplified simulation. Moreover, it seeks to
quantify the limitations encountered during the analysis. For this, the procedure adopted to
evaluate the elements implementation and efficiency was the CFD simulation, abbreviation
for Computer Fluid Dynamics, with the software DesignBuilder CFD. It was defined a base
case, where wind catchers were added with various settings, to compare them with each other
and appreciate the differences in flows and air speeds encountered. Initially there has been
done sensitivity tests for familiarization with the software and observe simulation patterns,
mapping the settings used and simulation time for each case simulated. The results show the
limitations encountered during the simulation process, as well as an overview of the
efficiency and potential of wind catchers, with the increase of ventilation with the use of
catchers, differences in air flow patterns and significant increase in air speeds indoors, besides
changes found due to different element geometries. It is considered that the software used can
help designers during preliminary analysis in the early stages of design