An effective thermal conductivity model ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
An effective thermal conductivity model for architected phase change material enhancer: theoretical and experimental investigations
Auteur(s) :
Hubert, Romain [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bou Matar Lacaze, Olivier [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Foncin, Jerome [Auteur]
Coquet, Philippe [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Tan, Dunlin [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Thales LAS France
Li, Hongling [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Teo, Edwin Hang Tong [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Merlet, Thomas [Auteur]
Thales LAS France
Pernod, Philippe [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bou Matar Lacaze, Olivier [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Foncin, Jerome [Auteur]
Coquet, Philippe [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Tan, Dunlin [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Thales LAS France
Li, Hongling [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Teo, Edwin Hang Tong [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Merlet, Thomas [Auteur]
Thales LAS France
Pernod, Philippe [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Titre de la revue :
International Journal of Heat and Mass Transfer
Pagination :
121364
Éditeur :
Elsevier
Date de publication :
2021
ISSN :
0017-9310
Mot(s)-clé(s) en anglais :
Effective thermal conductivity
Cellular materials Homogenization
Phase change materials
Thermal constriction
Flash laser method
Cellular materials Homogenization
Phase change materials
Thermal constriction
Flash laser method
Discipline(s) HAL :
Sciences de l'ingénieur [physics]/Matériaux
Résumé en anglais : [en]
Phase Change Materials (pcm) have been widely used for thermal energy storage due to their high latent heat of fusion. However, PCMs suffer from their very low thermal conductivity which limits heat spreading around the ...
Lire la suite >Phase Change Materials (pcm) have been widely used for thermal energy storage due to their high latent heat of fusion. However, PCMs suffer from their very low thermal conductivity which limits heat spreading around the heat source. Without proper thermal conductivity enhancement, melting would occur mainly around the heat source and heat would be conducted too slowly for the device to be efficient. It is especially true when dealing with high power densities. Metallic foams are usually used as thermal conductivity enhancer, yet recent progress in additive manufacturing have allowed architected structures to be used and optimized. We present here an analytical investigation of the Effective Thermal Conductivity (etc) of porous architected structures and emphasize is made on the effect of thermal constriction at the interface with a heat spreader in contact with the heat source. To confirm the efficiency of the model, it is compared to simulation data as well as experimental data obtained using flash laser method. Flash laser method data processing had to be modified to adapt to the porous media being characterized. For that purpose, a 1D finite difference model has been developed to solve the heat equation under flash laser conditions and derive the porous material effective properties. Using this model, architected structure were proven to have an ETC up to 75% higher than the one of foam for similar porosity in particular direction of space. The validity of the above mentioned model where proven through simulation, giving an almost perfect match and experiments detailed in this paper,which showed a maximum deviation of 11%.Lire moins >
Lire la suite >Phase Change Materials (pcm) have been widely used for thermal energy storage due to their high latent heat of fusion. However, PCMs suffer from their very low thermal conductivity which limits heat spreading around the heat source. Without proper thermal conductivity enhancement, melting would occur mainly around the heat source and heat would be conducted too slowly for the device to be efficient. It is especially true when dealing with high power densities. Metallic foams are usually used as thermal conductivity enhancer, yet recent progress in additive manufacturing have allowed architected structures to be used and optimized. We present here an analytical investigation of the Effective Thermal Conductivity (etc) of porous architected structures and emphasize is made on the effect of thermal constriction at the interface with a heat spreader in contact with the heat source. To confirm the efficiency of the model, it is compared to simulation data as well as experimental data obtained using flash laser method. Flash laser method data processing had to be modified to adapt to the porous media being characterized. For that purpose, a 1D finite difference model has been developed to solve the heat equation under flash laser conditions and derive the porous material effective properties. Using this model, architected structure were proven to have an ETC up to 75% higher than the one of foam for similar porosity in particular direction of space. The validity of the above mentioned model where proven through simulation, giving an almost perfect match and experiments detailed in this paper,which showed a maximum deviation of 11%.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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