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Titre du document / Document title

Non-linear thermal optimization and design improvement of a new internal light concrete multi-holed brick walls by FEM

Auteur(s) / Author(s)

DEL COZ DIAZ J. J. (1) ; GARCIA NIETO P. J. (2) ; SUAREZ SIERRA J. L. (1) ; PENUELAS SANCHEZ I. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Edificio Departamental Viesques, No.7, 33204 Gijón, Asturias, ESPAGNE
(2) Departamento de Matemáticas, Facultad de Ciencias, C/Calvo Sotelo s/n, 33007 Oviedo, Asturias, ESPAGNE

Résumé / Abstract

The aim of this work was carried out the optimization and numerical study by the finite element method of internal hollow bricks walls in order to determine the best candidate brick from the thermal point of view. With respect to the energy saving for housing and industrial structures, there is also a great interest in light building materials with good physical and thermal behaviors, which fulfills all thermal requirements of the new CTE Spanish rule. The conduction, convection and radiation phenomena are taking into account in this study for six different types of bricks varying the material conductivity obtained from five experimental tests. Mathematically, the non-linearity is due to the radiation boundary condition inside the inner recesses of the bricks. Optimization of the walls is carried out from the finite element analysis of the new hollow brick geometries by means of the average mass overall thermal efficiency and the equivalent thermal conductivity. Based on the previous thermal analysis and the optimization procedure described in this paper, the best candidate was chosen and then a full 1.22 x 0.23 x 1.05 m wall made of these bricks was simulated for fifteen different compositions. The main variables influencing the thermal conductivity of these walls are illustrated for different concrete and mortar properties and the temperature distribution is shown for some typical configurations. Finally, in order to select the appropriate wall satisfying the CTE requirements, detailed instructions are given and conclusions of this work are exposed.

Revue / Journal Title

Applied thermal engineering    ISSN  1359-4311 

Source / Source

2008, vol. 28, no8-9, pp. 1090-1100 [11 page(s) (article)] (18 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1996) (Revue)

Mots-clés anglais / English Keywords

Europe

;

Heat transfer

;

Modeling

;

Temperature distribution

;

Mortar

;

Thermal analysis

;

Thermal conductivity

;

Thermal efficiency

;

Geometry

;

Boundary condition

;

Experimental test

;

Conduction

;

Spain

;

Construction materials

;

Numerical analysis

;

Finite element method

;

Concrete

;

Optimization

;

Mots-clés français / French Keywords

Europe

;

Transfert chaleur

;

Modélisation

;

Champ température

;

Mortier

;

Analyse thermique

;

Conductivité thermique

;

Rendement thermique

;

Géométrie

;

Condition aux limites

;

Vérification expérimentale

;

Conduction

;

Espagne

;

Matériau construction

;

Analyse numérique

;

Méthode élément fini

;

Béton

;

Optimisation

;

Mots-clés espagnols / Spanish Keywords

Europa

;

Transferencia térmica

;

Modelización

;

Campo temperatura

;

Mortero

;

Análisis térmico

;

Conductividad térmica

;

Rendimiento térmico

;

Geometría

;

Condiciones límites

;

Verificación experimental

;

Conducción

;

España

;

Material construcción

;

Análisis numérico

;

Método elemento finito

;

Hormigón

;

Optimización

;

Mots-clés d'auteur / Author Keywords

Internal hollow brick wall

;

Light concrete

;

Finite element modelling

;

Non-linear complex heat transfer

;

Energy savings

;

Thermal optimization

;

Localisation / Location

INIST-CNRS, Cote INIST : 18801, 35400018321100.0330

Nº notice refdoc (ud4) : 20167001



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