Navegando por Assunto "Bioclimatic architecture"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Desempenho termoenergético da utilização de telhado vegetal em edificação no clima amazônico
(Universidade Federal do Pará, 2013-03-19) MARINHO, Dircirene Tavares; FRANCO, Irving Montanar; http://lattes.cnpq.br/4254203203850909; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
The thermoenergetic performance of all construction work stems from the decisionmaking of the initial phase, and the thermo-physical characteristics of the materials used must be considered. The thermo-physical phenomenon of inertia in the roof vegetable offers resistance to the transport of thermic charge to inside the edification, reducing the demand of the electric energy needed to its climatic conditioning. At the same time, the low albedo of the roof vegetable contributes to mitigate the effects of the heat islands in urban environments. The bioclimatic and microclimatic study needed will determine the choice of the suitable construction materials, especially regarding the protection of surfaces exposed to solar heat load. This work deals with the experimental verification of the thermoenergetic performance of a room covered with grass in a place where the vegetation is predominant, in the Guamá Science and Technology Park, Federal University of Pará Campus. The key objective was to examine the thermal response of the slab by proving mitigation of heat spikes by physical phenomenon of thermal inertia, implying favorable results of energy performance by reducing the use of active cooling. It was performed preliminary characterization of the indoor and outdoor microclimate through the obtained values of temperature and relative humidity of air, and observed the evolution of internal environmental conditions in two phases, with the slab discovered and after application of vegetation. The quantitative results showed favorable performance of the roof vegetation in the moderation of heat flow through the slab, contributing to the reduction of the temperature of indoor air and consequent energy efficiency in buildings in Amazonian climate.
Acesso aberto (Open Access)
Uso e adequação de tensoestruturas à região Amazônica estudo de caso: Feira do Ver-O-Peso em Belém-Pa
(Universidade Federal do Pará, 2006-09-15) FONTENELE, Helane Barbosa; SOUZA, Remo Magalhães de; http://lattes.cnpq.br/1995895693959225
The steady increase in use of tension structures for all sorts of applications, not always with the appropriate concern about local climate aspects, motivated the present study, which evaluates the adequacy of this type of covering to the Amazon Region. More specifically, the object of this study is the tension structures of the Ver-O-Peso free market, located in Belém-PA. In this work, the performance evaluation of the tensile roofs used in this fair was based on the concepts of Bioclimate Architecture, emphasizing their performance as protection to weather exposure. The employed methodology verified the adequacy of the design of these tension structures to the regions climate, using the following programa: Analyses Bio 3.0, SOL-AR 5.0.1, and Tensil 2.1. The results obtained with these computer programs allowed a critical analysis of the design of the Ver-O-Peso market tension structures, concerning their orientation with regard to predominant wind directions and incidence of solar rays, as well as regarding their thermal and luminous performance. In order to precisely study solar incidence on these tensile structures according to the sun position, a virtual model of the fair was created with the program 3DS MAX 8. Then, some computational simulations were performed considering the geographic coordinates of Belém, and the respective sun trajectory occurring during the summer solstice, winter solstice, and equinox. In addition to the analyses performed with these computer programs, a field research, based on several interview questions, was conducted to evaluate the satisfaction of the users (vendors and clients) of the fair. The obtained results demonstrated that it is necessary to improve protection conditions under these tensile structures, especially for the stands located at the border of the covered area. For this purpose, it is suggested that a vertical baffle made with a translucent membrane could be used. This baffle, if strategically placed on the most critical regions of the covering would allow light entrance, but at the same time, reducing the effects of direct ix radiation. Besides, it would also provide a better protection against rain, without changes in the aesthetics of the original design.