New methodology for the heat flow prediction for different construction materials

¹ Laboratory of Energy in Arid Regions, University of Tahri Mohamed - Bechar, P.O. P 417. 08000, Road Kenedza, Bechar, Algeria
² Department of Mechanical Engineering, University of Sciences and Technology of Oran -Mohamed Boudiaf, P.O.1505 El-Mnaouar, Oran, Algeria
³ Laboratory of Smart Grids and Renewable Energies, TAHRI Mohammed, University of Bechar, BP. 417 Bechar (08000), Algeria

^a Corresponding author: benachour_elhadj@yahoo.fr

Published online: 4 June 2018

Abstract

Among the ways of energy transfer by conduction is that of molecular interaction, in which the greater motion of a molecule at a higher energy level (temperature) imparts energy to adjacent molecules at lower energy levels. This type of transfer is present, to some degree, in all systems in which a temperature gradient exists and in which molecules of a solid, liquid, or gas are present. So, in heat transfer, the thermal conductivity of a substance is an intensive property that indicates its ability to conduct heat In particular in the building sector. The thermal flux is often measured with a mathematical analysis but for the same material, on the other hand the estimate will be disruptive and sometimes very difficult when the material changes. In this paper, a single equation for predicting heat flux of different materials is given.