DEVELOPMENT OF A COMPUTATIONAL CODE TO CALCULATE HEAT TRANSFER IN MULTILAYER WALLS

Resumo

The main objective of this research is to analyze the thermal behavior of walls submitted to
different situations, through a program developed by the author. In the program, it is possible to vary
the amount of layers in the wall with different materials, to change the color of the surface submitted to

the solar radiation, as well as the orientation of the wall in relation to the Sun. The transient and one-
dimensional model of the heat equation for solve the problem. Four examples with different properties

(number of layers, azimuth, surface absorptivity) were analyzed. The influence of these variations was
verified in each case. In one example, the outer wall temperature without insulation was 28.1667 ° C,
internal 27.0295 ° C, while the insulated wall temperatures were 28.1127 ° C and 25.5351 ° C. An
internal wall reduction of 1.4944 ° C, with a decrease of 5.5287% of the temperature with the inclusion
of 2cm (1 cm on each surface) of polystyrene, pearls.