New methodology for the heat flow prediction for different construction materials

Elhadj Benachour,Bachir Imine,Belkacem Draoui,Khadidja Asnoune,Brahim Mebarki,Allaoua Boumediene,P Dančová

doi:10.1051/epjconf/201818002006

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.

Highlights

According to the Second Law of Thermodynamics, heat transfer is only possible in the direction from higher temperatures to a lower one
Knowing how heat “flows” inside a structure is significant for designers to make sure that the structure will perform its intended heat conduction function properly [1]
Irrespective of the mode of heat transfer, the researcher is interested in the energy flow through which is diffused by this building material among the most important physical and thermal properties there is thermal conductivity

Summary

Introduction

According to the Second Law of Thermodynamics, heat transfer is only possible in the direction from higher temperatures to a lower one. It becomes zero if temperatures are equal. Irrespective of the mode of heat transfer, the researcher is interested in the energy flow through which is diffused by this building material among the most important physical and thermal properties there is thermal conductivity. We will vary the conductivity thermal analysis of four different materials: wood, concrete, brick and granite, and mathematical calculation of the thermal flux to find a point cloud that helps us to use Lagrange's polynomial interpolation method to develop a only correlation to estimate the heat flux diffused by one of these four materials proposed at all times

Objectives

Results

Conclusion