Documents disponibles écrits par cet auteur

1D model of an active magnetic regenerator / P. Nikkola 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. 43-50 Titre : 1D model of an active magnetic regenerator Titre original : Modèle unidimensionnel d'un régénérateur actif magnétique Type de document : texte imprimé Auteurs : P. Nikkola, Auteur ; C. Mahmed, Auteur ; M. Balli, Auteur Année de publication : 2014 Article en page(s) : pp. 43-50 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetic  refrigeration;  magnetic  cooling;  AMR;  modeling;  finite  differences Résumé : The 1D active magnetic regenerator model developed at the University of Applied Sciences of Western Switzerland is described. The system of two partial differential equations is discretized with the finite differences method backward in time and solved with the tridiagonal matrix algorithm. New features, not found in the literature in 1D models, are thermal losses in the regenerator, parasitic heat exchange, and the calculation of the AMR cycle output power in steady state. The model is implemented in MATLAB and it has a graphical user interface. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002600 [article] 1D model of an active magnetic regenerator = Modèle unidimensionnel d'un régénérateur actif magnétique [texte imprimé] / P. Nikkola, Auteur ; C. Mahmed, Auteur ; M. Balli, Auteur . - 2014 . - pp. 43-50. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 43-50 Mots-clés : Magnetic  refrigeration;  magnetic  cooling;  AMR;  modeling;  finite  differences Résumé : The 1D active magnetic regenerator model developed at the University of Applied Sciences of Western Switzerland is described. The system of two partial differential equations is discretized with the finite differences method backward in time and solved with the tridiagonal matrix algorithm. New features, not found in the literature in 1D models, are thermal losses in the regenerator, parasitic heat exchange, and the calculation of the AMR cycle output power in steady state. The model is implemented in MATLAB and it has a graphical user interface. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002600

Thermal investigations of an experimental active magnetic regenerative refrigerator operating near room temperature / Y. Chiba 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. 36-42 Titre : Thermal investigations of an experimental active magnetic regenerative refrigerator operating near room temperature Titre original : Etudes thermiques d'un réfrigérateur magnétique actif expérimental fonctionnant à température ambiante Type de document : texte imprimé Auteurs : Y. Chiba, Auteur ; Smaili, Arezki, Auteur ; C. Mahmed, Auteur Année de publication : 2014 Article en page(s) : pp. 36-42 Note générale : refrigeration Langues : Anglais (eng) Mots-clés : Active  magnetic  regenerator;  numerical  simulation;  magnetocaloric  effect;  thermal  analysis Résumé : In this paper, numerical and experimental investigations on a magnetic refrigeration device based upon the active magnetic regeneration (AMR) cycle operating near room temperature are presented. A numerical 1D model based on the transient energy equations is proposed for modelling the heat exchange between the magnetocaloric material and the carrier fluid in the regenerator bed. The validity of 1D AMR-numerical model is investigated through the recently developed magnetic cooling demonstrator by Clean Cooling Systems SA (CCS) at the University of Applied Sciences of western Switzerland (HES−SO). The obtained results including the temperature span, the coefficient of performance and the cooling power are presented and discussed. In general, good agreements have been noted between the experimental and numerical results. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002727 [article] Thermal investigations of an experimental active magnetic regenerative refrigerator operating near room temperature = Etudes thermiques d'un réfrigérateur magnétique actif expérimental fonctionnant à température ambiante [texte imprimé] / Y. Chiba, Auteur ; Smaili, Arezki, Auteur ; C. Mahmed, Auteur . - 2014 . - pp. 36-42. refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 36-42 Mots-clés : Active  magnetic  regenerator;  numerical  simulation;  magnetocaloric  effect;  thermal  analysis Résumé : In this paper, numerical and experimental investigations on a magnetic refrigeration device based upon the active magnetic regeneration (AMR) cycle operating near room temperature are presented. A numerical 1D model based on the transient energy equations is proposed for modelling the heat exchange between the magnetocaloric material and the carrier fluid in the regenerator bed. The validity of 1D AMR-numerical model is investigated through the recently developed magnetic cooling demonstrator by Clean Cooling Systems SA (CCS) at the University of Applied Sciences of western Switzerland (HES−SO). The obtained results including the temperature span, the coefficient of performance and the cooling power are presented and discussed. In general, good agreements have been noted between the experimental and numerical results. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002727