Skip to Main content Skip to Navigation
Theses

Nouveaux composites graphite/sel destinés au stockage de l'énergie thermique à haute température : De l'élaboration au développement de méthodes de caractérisation thermique de matériaux conducteurs orthotropes.

Abstract : This PhD is carried out within the framework of DISTOR (European) and HTPSTOCK (French) projects, which have for objective to conceive and study new graphite/salt composites dedicated to high temperature energy storage (>200°C). It is split into two distinct part.
The first one focused mainly on works linked with elaboration and thermal characterisation of these new composites. The different composites ways of elaboration (Dispersion, uniaxial compression, isostatic) associated to the different kind of graphite (Natural expanded graphite (ENG), synthetic graphite) investigated during the PhD are presented. The results of the thermal characterization campaign of these composites are also presented and permit to highlight the impact of graphite in the thermal behaviour of studied materials. Based on these results, modelling studies of the evolution of the thermal conductivity have been undertaken to deepen the understanding of the effect of graphite (quantity, size of particles) on the effective conductivity composites.
The second one describes the thermal characterization devices and associated thermo-kinetics models which had to be developed and adapted to the specificities of newly developed materials. This concerns mainly the materials prepared by compression, which present orthotropic properties and are difficult to reproduce. So, the characterization of this kind of material is very difficult and tedious. That is why we are committed to develop and adapt existing methods of characterization to allow the complete thermal characterisation of an orthotropic conductive material from a single experimentation on a single sample.
Document type :
Theses
Complete list of metadatas

Cited literature [102 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00263601
Contributor : Zoubir Acem <>
Submitted on : Wednesday, March 12, 2008 - 3:32:05 PM
Last modification on : Thursday, January 11, 2018 - 6:20:34 AM
Long-term archiving on: : Thursday, May 20, 2010 - 9:02:34 PM

Identifiers

  • HAL Id : tel-00263601, version 1

Collections

Citation

Zoubir Acem. Nouveaux composites graphite/sel destinés au stockage de l'énergie thermique à haute température : De l'élaboration au développement de méthodes de caractérisation thermique de matériaux conducteurs orthotropes.. Energie électrique. Université Sciences et Technologies - Bordeaux I, 2007. Français. ⟨tel-00263601⟩

Share

Metrics

Record views

1041

Files downloads

4610