THERMAL ANALYSIS OF DIFFERENT CONFIGURATIONS FOR BUILDING INSULATION SYSTEMS WITH ACTUAL MATERIALS USING REAL SOLAR RADIATION AND TEMPERATURE DATA

C. B. P. Sa, M. F. Curi

Abstract


Thermal insulation is present in several engineering areas, such as in civil
construction, in industrial ovens, in satellites and launch vehicles and even in
domestic applications, such as refrigerators. This work aims to present
multilayer insulation for civil construction, thus reducing electrical energy
expenditure on air conditioning the environment and increasing thermal
comfort. To determine the heat flow through the wall, it was necessary to
solve the heat diffusion equation in rectangular Cartesian coordinates for each
insulation layer, and the boundary conditions of each differential equation
depend on the neighboring layers, thus forming a system of equations. The
Wolfram Mathematica computational software was used to solve the
mathematical equations. The heat flow was determined for the four seasons
of the year throughout the day for different configurations of thermal
insulation, varying the insulating material and its thickness. After analyzing
the results, it was possible to observe the great efficiency of the models with
thermal insulation compared to traditional walls, making the internal wall's
temperature profile more constant throughout the day.


Keywords


thermal walls; heat transfer; thermal comfort; insulation systems

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DOI: http://dx.doi.org/10.5380/reterm.v20i1.80447

Copyright (c) 2021 C. B. P. Sa, M. F. Curi

Revista da Engenharia Térmica. ISSN: 1676-1790