A thin-film-heater method is setup to measure the thermal conductivity of super insulating materials such as silica aerogels. The experimental setup is purposely designed for insulating materials and allows direct measurement of the thermal conductivity. Few experimental data are available in the literature concerning thermal conductivity of aerogels even though these materials are of major interest in thermal insulation. More data are necessary in order to understand thermal transport and to validate existing models. Monolithic and granular silica aerogels are investigated. Our experimental technique enables to quantify the influence of important parameters, such as air pressure and distribution of grain sizes, on the insulating performance of this material.
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e-mail: spagnol@cict.fr
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Experimental Investigations on the Thermal Conductivity of Silica Aerogels by a Guarded Thin-Film-Heater Method
Sandra Spagnol,
Sandra Spagnol
Laboratoire PHASE,
e-mail: spagnol@cict.fr
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
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Bérangère Lartigue,
Bérangère Lartigue
Laboratoire PHASE,
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
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Alain Trombe,
Alain Trombe
Laboratoire PHASE,
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
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Florence Despetis
Florence Despetis
Groupe d’Etude des Semiconducteurs,
e-mail: despetis@univ-montp2.fr
Université Montpellier II
, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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Sandra Spagnol
Laboratoire PHASE,
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, Francee-mail: spagnol@cict.fr
Bérangère Lartigue
Laboratoire PHASE,
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
Alain Trombe
Laboratoire PHASE,
Université de Toulouse
, Bâtiment 3R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
Florence Despetis
Groupe d’Etude des Semiconducteurs,
Université Montpellier II
, Place Eugène Bataillon, 34095 Montpellier Cedex 5, Francee-mail: despetis@univ-montp2.fr
J. Heat Transfer. Jul 2009, 131(7): 074501 (4 pages)
Published Online: April 30, 2009
Article history
Received:
March 6, 2008
Revised:
January 26, 2009
Published:
April 30, 2009
Citation
Spagnol, S., Lartigue, B., Trombe, A., and Despetis, F. (April 30, 2009). "Experimental Investigations on the Thermal Conductivity of Silica Aerogels by a Guarded Thin-Film-Heater Method." ASME. J. Heat Transfer. July 2009; 131(7): 074501. https://doi.org/10.1115/1.3089547
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