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Titre du document / Document title

Nonlinear thermal optimization of external light concrete multi-holed brick walls by the finite element method

Auteur(s) / Author(s)

DEL COZ DIAZ J. J. (1) ; GARCIA NIETO P. J. (2) ; SUAREZ SIERRA J. L. (1) ; BETEGON BIEMPICA C. (1) ;

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

(1) Deparonent Building of Viesques, N°, 7-33204 Giyón (Asturias), ESPAGNE
(2) Department of Mathematics, Faculty of Sciences. Cl Calvo Sotelo sin, 33007 Oviedo (Asturias), ESPAGNE

Résumé / Abstract

In this work, an analysis and numerical study have been carried out in order to determine the best candidate brick from the thermal point of view by the finite element method. With respect to the ecological design and the energy saving for housing and industrial structures, there is also a great interest in light building materials with good physical and thermal behaviours, which fulfils all thermal requirements of the new CTE Spanish rule for further energy savings. The conduction, convection and radiation phenomena are taking into account in this study for four different types of bricks varying the material conductivity obtained from the experimental tests. Based on the previous thermal analysis, the best candidate was chosen and then a full 1.05 x 0.35 x 1.0 m. wall made of these bricks was simulated for fifteen different compositions and temperature distribution is also provided for some typical configurations. The major variables influencing the thermal conductivity of these walls are illustrated in this work for different concrete and mortar properties. The finite element method (FEM) is used for finding accurate solutions of the heat transfer equation for light concrete hollow brick walls. Mathematically, the nonlinearity 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 four hollow brick geometries by means of the average mass overall thermal efficiency and the equivalent thermal conductivity. In order to select the appropriate wall satisfying the CTE requirements, detailed instructions are given. Finally, conclusions of this work are exposed.

Revue / Journal Title

International journal of heat and mass transfer    ISSN  0017-9310   CODEN IJHMAK 

Source / Source

2008, vol. 51, no7-8, pp. 1530-1541 [12 page(s) (article)] (22 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1960) (Revue)

Mots-clés anglais / English Keywords

Three dimensional model

;

Finite element method

;

Mathematical model

;

Geometry

;

Thermal analysis

;

Energy savings

;

Energy transfer

;

Lightweight concrete

;

Outside wall

;

Nonlinear analysis

;

Optimization

;

Numerical simulation

;

Brick masonry

;

Mots-clés français / French Keywords

Modèle 3 dimensions

;

Méthode élément fini

;

Modèle mathématique

;

Géométrie

;

Analyse thermique

;

Economies d'énergie

;

Transfert énergie

;

Béton léger

;

Mur extérieur

;

Analyse non linéaire

;

Optimisation

;

Simulation numérique

;

Maçonnerie brique

;

Mots-clés espagnols / Spanish Keywords

Modelo 3 dimensiones

;

Método elemento finito

;

Modelo matemático

;

Geometría

;

Análisis térmico

;

Ahorros energía

;

Transferencia energía

;

Hormigón liviano

;

Muro exterior

;

análisis no lineal

;

Optimización

;

Simulación numérica

;

Mampostería ladrillo

;

Localisation / Location

INIST-CNRS, Cote INIST : 9415, 35400017365546.0040

Nº notice refdoc (ud4) : 20187847



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