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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

HEAT TRANSFER AND INTERFACE EVOLUTION OF THE PCM MELTING IN A RECTANGULAR ENCLOSURE WITH OR WITHOUT POROUS MEDIA

Get access (open in a dialog) DOI: 10.1615/IHTC16.pma.022312
pages 7993-8007

要約

Phase change energy storage is an important solution for overcoming human energy crisis. In this paper, temperature, flow field, solid-liquid interface of a PCM with or without porous media were theoretically studied. The influences of basic parameters on the melting process were analyzed. A PCM thermal storage device with metal-foam is designed and a thermodynamic analysis for it is conducted. The optimal PCM temperature and the optimal HTF temperature in the metal-foam-enhanced thermal storage device are derived. The results show that the solid-liquid interface of the pure PCM is a line, and that of the mixture PCM is a mushy area. Natural convection in the melting liquid is very intensive for a PCM without porous medium. The porous medium weakens the natural convection, and makes temperature field, flow field and solid-liquid interface distribution more homogeneous. Metal foams greatly improve the PCM heat transfer rate. Heat transfer enhancement with metal foams is proved to be potential for thermal storage applications.