Caracterização térmica de coberturas verdes de base polimérica

Abstract

This work proposes a new method for thermal characterization of green roofs, which is based on the analysis of the temperature profiles, through a new approach Thermal Resistance Equivalent. Temperature measurements were performed in two modules with asbestos tiles: one with a green cover and the other with insulating material. In the new method, called Resistance Equivalent Method, layers of insulating material are used, with known thermal conductivity, in order to achieve equivalent temperature profiles for both modules, with and without green cover. Thus, it is possible to obtain the equivalent conductivity coefficient (k) of structural material with the plant. It is worth noting that the literature is lacking as to methods and / or techniques to this end. In the characterization study, the thermal coefficients of the substrates were obtained from the literature, but in the case of plants, there are few methods and / or data thermal properties of these materials. This method is basically to reach an equivalent thermal resistance of green cover with the insulating material of known thermal conductivity ranging, for this, its thickness. In the study it was possible to a flexible structural base (GreenFlex) for the construction of green roofs, which has been patented due to the novelty and originality of the new material [1]. Thermal characterization experiments were done Greenflex the material with the plant genus Commelina, it is possible to obtain equivalent thermal conductivity, specific heat and density, which are respectively equal to: 0.159 W / mK, 2.96 kJ / kgK and 875.3 kg / m³.