The project of efficient energy buildings requires knowledge about heat transfer from the external environment, in order to create solutions that combine different materials and thicknesses to the desired conditions of thermal comfort. The objective of this work is to assess, from de viewpoint of buildings physics, several types and materials arrangement on solid brick walls. For the achievement of the experiments, full-scale models were fabricated, instrumented and coupled to a heat chamber, developed especially for this purpose. The heat transfer problem was modelled by energy equation, solved in Central Finite Differences using the Implicit Method. The thermal diffusivities of the materials were calculated by solving the Inverse Problem of heat transfer. It was also calculated the heat flow and the total cost of each alternative, ending with the achievement of thermo-economic relation to each wall. Through the thermo-economic analysis, it can be verified that although the initial investment is relatively higher on the thicker walls and/or with thermal insulation, these present a much higher thermal behaviour in comparison to the traditional ones. Notably, the wall with EPS on the external surface presented the best performance.
Heat transfer; Walls; Mathematical modelling; Energy efficiency
