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Heat Pipe Science and Technology, An International Journal

ISSN Print: 2151-7975
ISSN Online: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

Heat Pipe Science and Technology, An International Journal

DOI: 10.1615/HeatPipeScieTech.v5.i1-4.370
pages 335-342

3D MODELING AND OPTIMIZATION OF A LOOP HEAT PIPE EVAPORATOR

R. Hodot
CETHIL - INSA de Lyon - UMR 5008 CNRS, 9 rue de la physique, Villeurbanne 69621, France; Thales Avionics, 25 rue Jules Védrines, 26027 Valence Cedex, France
Valerie Sartre
University of Lyon, CNRS, INSA-Lyon, CETHIL UMR5008, F-69621, Villeurbanne, France
Frederic Lefevre
University Lyon, CNRS, INSA-Lyon, CETHIL UMR5008, F-69621, Villeurbanne, France
C. Sarno
Thales Avionics, 26027 Valence, France

ABSTRACT

A three dimensional modeling of a loop heat pipe (LHP) evaporator is presented. The model is developed to take into account different geometrical configurations of the evaporator, as well as the nonsymmetrical temperature and heat flux distributions in a cylindrical LHP evaporator which is usually neglected. Both convection and conduction phenomena are considered in the porous wick. The evaporation heat transfer coefficient is calculated at the vaporization interface. This 3D modeling approach is integrated into a global model of the whole loop heat pipe and compared with experimental measurements. Various modifications of the evaporator design have been considered: the most important improvement of the performance is obtained by optimizing the disposition of the axial vapor grooves as well as the saddle, or radial vapor grooves.


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