| Titre : | Modeling of a two-stage magnetic refrigerator with wavy-structure gadolinium heat exchangers (2010) |
| Titre original : | Modélisationon d’un réfrigérateur magnétique biétagé muni d’échangeurs de chaleur ondulés en gadolinium |
| Auteurs : | D. Vuarnoz, Auteur ; A. Kitanovski, Auteur ; C. Gonin, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | International journal of refrigeration (Vol. 33 N° 4, Juin 2010) |
| Article en page(s) : | pp. 745-752 |
| Note générale : | Génie Mécanique |
| Langues : | Anglais |
| Index. décimale : | 621.5 (Energie pneumatique. Machinerie et outils. Réfrigération) |
| Tags : | Magnetic refrigerator Two-stage system Modelling Simulation Performance-COP |
| Résumé : | In a rotary magnetic refrigerator a porous ring is turning in and out of a magnetic field region. The adiabatic demagnetization of the magnetocaloric material produces the “cold energy”. This is described by a discontinuous temperature decrease, known as adiabatic temperature difference. For such a machine a physical model has been developed, based on a mapping of the magneto-thermodynamic problem. In this model, in a basic centre cell, two coupled linear partial differential equations are solved, which have been programmed in the Modelica language. The operation of a magnetic refrigerator is simulated with numerous parameters. Steady state solutions are obtained to verify the coefficient of performance under stable operation conditions. Optimal running conditions – defined by maximum values of the coefficient of performance – are not presented in this article, but can now easily be obtained with the existing program. A simple regulation strategy is proposed and implemented into the program. |
| DEWEY : | 621.5 |
| ISSN : | 0140-7007 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0140700709003119 |
