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Previous issue date: 2011-03-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / 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 / A envolt?ria da edifica??o consiste no principal meio de intera??o entre ambiente e exterior,
com influ?ncia direta no desempenho t?rmico e energ?tico do edif?cio. Atrav?s da interven??o
na envolt?ria, com a proposi??o de elementos arquitet?nicos espec?ficos, ? poss?vel promover
o uso de estrat?gias passivas de condicionamento, a exemplo da ventila??o natural. A
ventila??o cruzada ? recomendada pela NBR 15220-3 como principal estrat?gia bioclim?tica
para o clima quente e ?mido de Natal/RN, oferecendo dentre outros benef?cios, o conforto
t?rmico dos ocupantes. As ferramentas de an?lise da ventila??o natural, por sua vez,
abrangem diversas t?cnicas, desde m?todos de c?lculos simplificados a simula??es
computacionais de fluidos, cujas limita??es s?o discutidas em diversos trabalhos, por?m sem
detalhamento dos problemas encontrados. Neste sentido, o presente trabalho tem objetivo de
avaliar o potencial dos captadores de vento, elementos de envolt?ria aplicados para
incremento da ventila??o natural na edifica??o, atrav?s de simula??o simplificada em CFD.
Al?m disto, busca quantificar as limita??es encontradas durante as an?lises. Para tanto, o
procedimento adotado para avaliar a aplica??o e efici?ncia dos elementos foi a simula??o
computacional em CFD, sigla em ingl?s para Computer Fluid Dynamics, no software
DesignBuilder CFD. Foi definido um caso base, onde se acrescentaram captadores de vento
com diversas configura??es, para compar?-los entre si e avaliar as diferen?as no fluxo e
velocidades do ar encontradas. Inicialmente deu-se prosseguimento a testes de sensibilidade
para familiariza??o com o software e observar padr?es de simula??o, com mapeamento das
configura??es utilizadas e tempo de simula??o de cada caso simulado. Os resultados mostram
as limita??es encontradas durante o processo de simula??o, assim como um panorama da
efici?ncia e do potencial dos captadores de vento, com o incremento da ventila??o com a
utiliza??o dos captadores, diferen?as nos padr?es de fluxo de ar e aumento consider?vel das
velocidades do ar no interior do ambiente, al?m de altera??es encontradas em fun??o das
diferentes geometrias do elemento. Considera-se que o software utilizado pode auxiliar
projetistas durante an?lises preliminares em fases iniciais do projeto
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12357 |
| Date | 01 March 2011 |
| Creators | Ara?jo, Carla Varela de Albuquerque |
| Contributors | CPF:75042142991, http://lattes.cnpq.br/9012296636400514, Tinoco, Marcelo Bezerra de Melo, CPF:41385039434, http://lattes.cnpq.br/8060203177958046, Bittencourt, Leonardo Salazar, CPF:12917907484, http://lattes.cnpq.br/8764685045584103, Pedrini, Aldomar |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Arquitetura e Urbanismo, UFRN, BR, Conforto no Ambiente Constru?do; Forma Urbana e Habita??o |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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