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

Díaz, J.; Nieto, P.J. Garcı́a; Sierra, J.L. Suárez; Sánchez, Irina

doi:10.1016/j.applthermaleng.2007.06.023

Cited by 59 publications

(25 citation statements)

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“…The results obtained using FEM [6,9,30,31] are processed in order to obtain the overall heat transfer coefficient, U (W/m 2 K). The calculation of this parameter is based on the next equations [44,45]:…”

Section: Numerical Fem Resultsmentioning

confidence: 99%

“…In this section we will describe the finite element modeling and analysis techniques used, taking into account the excellent agreement between experimental tests and numerical simulations by FEM for a certain wall's configuration [30,31].…”

Section: Fem Modelingmentioning

confidence: 99%

“…Based on previous research works [29][30][31]35,36], we have used the finite element method (FEM) as a tool for the theoretical investigation of the thermal behavior of three different multi-holed bricks under steady-state conditions. Usually, brick recesses are too long in comparison to their transversal dimensions and, in consequence, a two-dimensional approach is adopted in the subsequent numerical FEM models.…”

Section: Numerical Modeling As Vertically Multi-holed Bricks Designedmentioning

confidence: 99%

“…The development of mathematical models to predict heat transfer processes is a valuable tool in the field of heat and mass transfer technology. These models play an important role in simulation and optimization of complex systems leading to efficient and economical hollow brick designs [30,31].…”

Section: Introductionmentioning

confidence: 99%

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Thermal performance optimization of hollow clay bricks made up of paper waste

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Díaz

Rabanal

et al. 2014

Energy and Buildings

136

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a b s t r a c tIn this paper, the thermal behavior of hollow clay bricks made up of paper waste has been studied and their thermal performance has been optimized. On the one hand, both strength and thermal properties of different paper waste concentrations have been obtained by means of laboratory tests. Thermal conductivity of the microporous brick materials with additives produced in this study reduced from 0.68 W/m K to 0.39 W/m K compared with that of the sample without additives. On the other hand, the finite element method (FEM) has been applied to the nonlinear numerical thermal analysis of three different hollow bricks, including radiation and convection phenomena inside holes. Next, using the design of experiments (DOE) over the FEM models, several parameters such as the material conductivity, the convection and radiation properties and the mean brick temperature have been studied. In general, the thermal resistance is a nonlinear function that depends on the geometry of the recesses, the material properties and the temperature distribution. In all analyzed cases, minimizing the material thermal conductivity of bricks and decreasing the recesses surface radiation emissivity caused a lower thermal transmittance in the brick. Finally, the most important conclusions and the main findings of this research are exposed.

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Section: Numerical Fem Resultsmentioning

confidence: 99%

Section: Fem Modelingmentioning

confidence: 99%

Section: Numerical Modeling As Vertically Multi-holed Bricks Designedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal performance optimization of hollow clay bricks made up of paper waste

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Díaz

Rabanal

et al. 2014

Energy and Buildings

136

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“…Fan et al [7] described a new building material named expanded polystyrene recycled concrete and conducted corresponding numerical simulations for hollow EPSRC blocks and thermally insulating walls based on thermodynamic principles. In recent works, numerical simulation methods have been proposed by Del Coz Díaz et al [8][9][10][11] for studying various types of walls made of different light concrete hollow bricks. Li et al [12] presented the development of a simplified heat transfer model of hollow blocks for simple and efficient heat flow calculation.…”

Section: Introductionmentioning

confidence: 99%

Study on the Thermal Properties of Hollow Shale Blocks as Self-Insulating Wall Materials

Bai

et al. 2017

Advances in Materials Science and Engineering

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To reduce energy consumption and protect the environment, a type of hollow shale block with 29 rows of holes was designed and produced. This paper investigated the thermal properties of hollow shale blocks and walls. First, the guarding heat-box method was used to obtain the heat transfer coefficient of the hollow shale block walls. The experimental heat transfer coefficient is 0.726 W/m 2 ⋅K, which would save energy compared to traditional wall materials. Then, the theoretical value of the heat transfer coefficient was calculated to be 0.546 W/m 2 ⋅K. Furthermore, the one-dimensional steady heat conduction process for the block and walls was simulated using the finite element analysis software ANSYS. The predicted heat transfer coefficient for the walls was 0.671 W/m 2 ⋅K, which was in good agreement with the test results. With the outstanding self-insulation properties, this type of hollow shale block could be used as a wall material without any additional insulation measures in masonry structures.

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Masonry Units

Pacheco-Torgal¹,

Jalali²

2011

Eco-Efficient Construction and Building Materials

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

Cited by 59 publications

References 1 publication

Thermal performance optimization of hollow clay bricks made up of paper waste

Thermal performance optimization of hollow clay bricks made up of paper waste

Study on the Thermal Properties of Hollow Shale Blocks as Self-Insulating Wall Materials

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