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Encapsulated phase change material under cyclic pulsed heat load / T. Kousksou in International journal of refrigeration, Vol. 33 N° 8 (Décembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1648-1656 Titre : Encapsulated phase change material under cyclic pulsed heat load : Matériau à changement de phase encapsulé à charge thermique à pulsations Type de document : texte imprimé Auteurs : T. Kousksou, Auteur ; P. Bruel, Auteur Année de publication : 2011 Article en page(s) : pp. 1648-1656 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat  storage  Material  Phase  change  Modelling  Simulation  Solar  energy  Improvement Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this work is to investigate numerically a storage system formed by a cylindrical tank which is randomly packed with spheres having uniform sizes and encapsulating paraffin as phase change material (PCM). The packed bed is tested for various complex input temperature signals of the working fluid as well as for different internal layouts. A stochastic differential Langevin equation is used to add some randomness in the sinusoidal inlet working fluid temperature signal. The results obtained put into evidence the noticeable sensitivity of the bed response to the adjunction of such a low amplitude stochastic signal. The results obtained for a multi-slab configuration indicate also that it is possible to maximise the energy stored under a latent form by properly selecting and ordering the different PCM’s in the bed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001234 [article] Encapsulated phase change material under cyclic pulsed heat load : Matériau à changement de phase encapsulé à charge thermique à pulsations [texte imprimé] / T. Kousksou, Auteur ; P. Bruel, Auteur . - 2011 . - pp. 1648-1656. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1648-1656 Mots-clés : Heat  storage  Material  Phase  change  Modelling  Simulation  Solar  energy  Improvement Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this work is to investigate numerically a storage system formed by a cylindrical tank which is randomly packed with spheres having uniform sizes and encapsulating paraffin as phase change material (PCM). The packed bed is tested for various complex input temperature signals of the working fluid as well as for different internal layouts. A stochastic differential Langevin equation is used to add some randomness in the sinusoidal inlet working fluid temperature signal. The results obtained put into evidence the noticeable sensitivity of the bed response to the adjunction of such a low amplitude stochastic signal. The results obtained for a multi-slab configuration indicate also that it is possible to maximise the energy stored under a latent form by properly selecting and ordering the different PCM’s in the bed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001234