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Fluid choice and test standardization for magnetic regenerators operating at near room temperature / Jianghong Wu in International journal of refrigeration, Vol. 37 N° 1 (Janvier 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 135–146 Titre : Fluid choice and test standardization for magnetic regenerators operating at near room temperature Titre original : Choix du frigorigène et normalisation des essais pour les régénérateurs fonctionnant à température ambiante Type de document : texte imprimé Auteurs : Jianghong Wu, Auteur ; Chaopeng, Liu, Auteur ; Puxiu, Hou, Auteur Année de publication : 2014 Article en page(s) : pp. 135–146 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetic  refrigeration;  simulation;  regenerator;  optimization;  performance Résumé : Numerical simulations are performed to investigate the performance of an active magnetic regenerator (AMR) operating near room temperature. A two-dimensional porous model is established to analyze the impact different heat transfer fluids (HTFs) have on the performance of the AMR. The internal temperature distribution and cooling capacity of the system are analyzed and the influence of the HTF discussed. The simulation results show that when mercury is substituted in place of water as the HTF, the cooling capacity can be enhanced by nearly 600%. A fluid with high conductivity, high density, and low specific heat is most suitable for use as the HTF. Furthermore, as the environmental conditions have a great impact upon the performance of the AMR, three feasible methods of standardization testing are proposed. These involve: the evaluation index under fixed test environment conditions, a maximum exergy method, and a maximum specific exergy method around the Curie temperature. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002570 [article] Fluid choice and test standardization for magnetic regenerators operating at near room temperature = Choix du frigorigène et normalisation des essais pour les régénérateurs fonctionnant à température ambiante [texte imprimé] / Jianghong Wu, Auteur ; Chaopeng, Liu, Auteur ; Puxiu, Hou, Auteur . - 2014 . - pp. 135–146. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 135–146 Mots-clés : Magnetic  refrigeration;  simulation;  regenerator;  optimization;  performance Résumé : Numerical simulations are performed to investigate the performance of an active magnetic regenerator (AMR) operating near room temperature. A two-dimensional porous model is established to analyze the impact different heat transfer fluids (HTFs) have on the performance of the AMR. The internal temperature distribution and cooling capacity of the system are analyzed and the influence of the HTF discussed. The simulation results show that when mercury is substituted in place of water as the HTF, the cooling capacity can be enhanced by nearly 600%. A fluid with high conductivity, high density, and low specific heat is most suitable for use as the HTF. Furthermore, as the environmental conditions have a great impact upon the performance of the AMR, three feasible methods of standardization testing are proposed. These involve: the evaluation index under fixed test environment conditions, a maximum exergy method, and a maximum specific exergy method around the Curie temperature. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002570