Comportamento térmico da madeira maciça Tectona grandis L. f. e Pinus elliottii Engelm

Abstract

Wood is one of the best elaborated materials of organic origin, presenting a set of physical and mechanical characteristics hardly found in other materials, in addition to an innumerable variation of aesthetic patterns. Knowing the technological behavior of wood from different forest species, native or exotic, is essential to increase the alternatives for their use. Among its properties, thermal conductivityis important, which indicates the measurement of heat flow through the thickness of the material, subject to a temperature difference. In this work, temperature measurements were made on samples of two speciesand the thermal conductivity was calculated using a mathematical model. This study was carried out on the Campus of the Federal Technological University of Paraná, in the municipality of Dois Vizinhos. A total of twenty samples were kept in an air-conditioned environment with constant moisture contents, measured dimensions and their calculated densities. The data were obtained through a prototype built like a box and a heat source, simulating the passage of energy through the material. It was verified through the data collected that the pine samples showed higher thermal conductivity, due to factors such as the moisture content and their cellular constitution. Statistical analyzes revealed a moderate dispersion, in the order of up to 19% in the variation coefficient.