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Modélisation par la méthode Boltzmann sur réseau pour la fusion de matériaux à changement de phase (PCM) avec des milieux poreux dans un échangeur de chaleur.

A Lattice Boltzmann model for phase change material (pcm) melting with porous media in heat exchanger.

Numéro : 2508

Auteurs : CHEN D., RIAZ A., AUTE V. C., RADERMACHER R.

Résumé

Phase change material (PCM) is widely used in thermal energy storage systems as it can absorb and release a large amount of heat by the phase change process. Both experimental and numerical studies of PCM have increased substantially in the past two decades. Among them, the phase change in porous media is one of the significant topics. The simulation of PCM melting in porous media is required to characterize the fluid flow and heat transfer behavior, and to provide guidance for the further design and optimization of PCM heat exchangers and thermal energy storage systems. In this paper, a model is developed based on the Lattice Boltzmann method (LBM) to simulate transient phase change in porous media. Double distribution functions coupled with a multirelaxationtime (MRT) scheme are utilized in LBM for the simulation of the fluid flow and temperature field, respectively. An enthalpy updating scheme is also applied to determine the liquid fraction of PCM, which is used to track the solidliquid interface. The basic model in Cartesian coordinate is verified with the simulation of PCM phase change in a porous rectangular container. The model is further adapted for use in cylindrical coordinates for simulating the phase change process within porous media in a cylindrical heat exchanger. The developed model is verified by two vertical annulus cases and the results indicate that the developed model can successfully simulate the effects of natural convection and porous media on the thermal flow. More validation cases are expected to be conducted for the developed model to test its ability to simulate the phase change process. And the fully developed model is expected to be applied in a wider field of PCM phase change, which can benefit the design and improvement of PCM heat exchangers in thermal energy storage systems.

Documents disponibles

Format PDF

Pages : 10

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A Lattice Boltzmann model for phase change material (pcm) melting with porous media in heat exchanger.
  • Identifiant de la fiche : 30028499
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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