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Research Article

Study on transient heat transfer through multilayer thermal insulation: Numerical analysis and experimental investigation

Lazaros Elias Mavromatidis1( ), Pierre Michel1, Mohamed El Mankibi1, Mat Santamouris2
Université de Lyon, Ecole Nationale des Travaux Publics de l’Etat (ENTPE), CNRS FRE 3237, DGCB, Building & Civil Engineering Department, Building Sciences Laboratory, 3 Rue Maurice Audin, F-69120 (69518), Vaulx-en-Velin Cedex, Lyon, France
National Kapodistrian University of Athens, Physics Department Group Building Environmental Research, Panepistimioupolis, Building Physics 5,15784, Athens, Zografou, Greece
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Abstract

This paper reports on a numerical and experimental study of heat transfer phenomena through two different multilayer fibrous insulations for building applications. The investigated samples were composed of different layers of fibrous materials and aluminium foils, placed between one or two air gaps in the vertical dimension. An experimental apparatus (a guarded hot box) has been used to measure heat transfer through the samples, while a finite volume numerical model combined radiation/conduction heat transfer was developed to predict the temperature distribution and heat transfer in such insulation systems comprised of the materials separated by multiple reflective foils. The model takes into account the coupling between the solid conduction of the fibrous system and the gaseous conduction and radiation. The radiation heat transfer through the insulation system has been modelled via the two flux approximation. The numerical results were compared with the experimental data from the guarded hot box for model validation, as well as to assess the effectiveness of the reflective foils in changing the resistance of the insulations. The comparative verification of the model showed that the numerical results were consistent with the experimental data through the environmental conditions under examination.

Keywords

heat transfermultilayer insulationreflective foilsthermal radiationbioclimatic design

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Building Simulation
Volume 3 Issue 4,
December 2010
Pages 279-294
DOI: 10.1007/s12273-010-0018-z
Cite this article:
Mavromatidis LE, Michel P, Mankibi ME, et al. Study on transient heat transfer through multilayer thermal insulation: Numerical analysis and experimental investigation. Building Simulation, 2010, 3(4): 279-294. https://doi.org/10.1007/s12273-010-0018-z

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Received: 25 August 2010
Revised: 29 October 2010
Accepted: 09 November 2010
Published: 04 December 2010
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010
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