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Experimental and numerical results of a high frequency rotating active magnetic refrigerator / J. A. Lozano 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. 92–98 Titre : Experimental and numerical results of a high frequency rotating active magnetic refrigerator Titre original : Réfrigérateur magnétique actif rotatif à haute fréquence: résultats expérimentaux et numériques Type de document : texte imprimé Auteurs : J. A. Lozano, Auteur ; K. Engelbrecht, Auteur ; C. R. H. Bahl, Auteur Année de publication : 2014 Article en page(s) : pp. 92–98 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Active  magnetic  regenerator;  magnetic  refrigeration;  experiment;  numerical  modelling;  parasitic  losses  analysis Résumé : Experimental results for a recently developed prototype magnetic refrigeration device at the Technical University of Denmark (DTU) were obtained and compared with numerical simulation results. A continuously rotating active magnetic regenerator (AMR) using 2.8 kg packed sphere regenerators of gadolinium (Gd) was employed. With operating frequencies up to 10 Hz and volumetric flow rates up to 600 L h−1, the prototype has shown high performance and the results are consistent with predictions from numerical modelling. Magnetocaloric properties of the Gd spheres were obtained experimentally and implemented in a one-dimensional numerical AMR model that includes also the parasitic losses from the prototype. The temperature span for a thermal load of 200 W as a function of frequency was measured and modelled. Moreover, the temperature span dependence on the cooling capacity as a function of cycle frequency was determined. A detailed study of these parasitic losses was carried out experimentally and numerically. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002351 [article] Experimental and numerical results of a high frequency rotating active magnetic refrigerator = Réfrigérateur magnétique actif rotatif à haute fréquence: résultats expérimentaux et numériques [texte imprimé] / J. A. Lozano, Auteur ; K. Engelbrecht, Auteur ; C. R. H. Bahl, Auteur . - 2014 . - pp. 92–98. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 92–98 Mots-clés : Active  magnetic  regenerator;  magnetic  refrigeration;  experiment;  numerical  modelling;  parasitic  losses  analysis Résumé : Experimental results for a recently developed prototype magnetic refrigeration device at the Technical University of Denmark (DTU) were obtained and compared with numerical simulation results. A continuously rotating active magnetic regenerator (AMR) using 2.8 kg packed sphere regenerators of gadolinium (Gd) was employed. With operating frequencies up to 10 Hz and volumetric flow rates up to 600 L h−1, the prototype has shown high performance and the results are consistent with predictions from numerical modelling. Magnetocaloric properties of the Gd spheres were obtained experimentally and implemented in a one-dimensional numerical AMR model that includes also the parasitic losses from the prototype. The temperature span for a thermal load of 200 W as a function of frequency was measured and modelled. Moreover, the temperature span dependence on the cooling capacity as a function of cycle frequency was determined. A detailed study of these parasitic losses was carried out experimentally and numerically. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002351