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Conception et réalisation de caloducs silicium pour les applications spatiales

Abstract : In a context of further integration and increase of operationnal working domains of
electronic systems aboard satellites, the conception of effective and compact cooling systems
for the thermal management of power densities of several decades of W/cm^2 is
necessary.This Phd work which took place at the "Laboratoire d'Electrotechnique de
Grenoble" (LEG) and used the technological expertise of the CEA-LETI focuses on the study
of silicon phase-change systems using water as the working fluid for the on board cooling of
electronics considering specifications provided by the CNES.
Using microelectronic technics (especially deep etching technics), specific advantages of
silicon for space applications (low mass, good mechanical behaviour, compatibility with
electronics) and a first experience of the realization of phase change systems, hydraulical ,
mechanical and thermal designs of 5 cm square spreaders with reduced compacity (1mm) able
for microgravity working and the realization of prototypes were dealt.Thermal and hydraulical
performances characterization of the latter enable to forecast dissipation of power densities up
to 76 W/cm^2 with an equivalent thermal conductivity of 800 W/(m.K) according to the
working temperature domain considered.
Moreover, a study of the issue of the filiing of the structure and hermetic confinment of the
fluid was dealt and an innovative patented solution was proposed.
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Submitted on : Friday, September 7, 2007 - 2:11:40 PM
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  • HAL Id : tel-00170346, version 1



Aymeric Laï. Conception et réalisation de caloducs silicium pour les applications spatiales. Energie électrique. Institut National Polytechnique de Grenoble - INPG, 2005. Français. ⟨tel-00170346⟩



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