Documents disponibles écrits par cet auteur

Improvement and application of a numerical model for optimizing the design of magnetic refrigerators / M. Risser in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 950–957 Titre : Improvement and application of a numerical model for optimizing the design of magnetic refrigerators Titre original : Amélioration et application d'un modèle numérique pour l'optimisation de la conception des réfrigérateurs magnétiques Type de document : texte imprimé Auteurs : M. Risser, Auteur ; C. Vasile, Auteur ; C. Muller, Auteur Année de publication : 2013 Article en page(s) : pp. 950–957 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetocaloric  refrigerator;  Modelling;  Thermodynamic  cycle;  Exergy;  Gadolinium Résumé : Magnetocaloric systems are interesting from the point of view of energy efficiency and could be environment-friendly products. Numerous prototypes have demonstrated the feasibility of such systems for applications around room temperature, but there is still room for improvement. The research of an optimal configuration only by an experimental approach is a complex and difficult task due to numerous building parameters and driving parameters. Therefore we propose here a methodology based on a numerical approach. A numerical model calibrated with respect to experimental tests is used to make a parametric analysis of a magnetocaloric system. The design of the system is made according to given functional specifications, targeting different design strategies such as the power density, the energy efficiency, the maximizing of the temperature span, etc. This work is a step forward to the increase of the efficiency in the design of our future systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002721 [article] Improvement and application of a numerical model for optimizing the design of magnetic refrigerators = Amélioration et application d'un modèle numérique pour l'optimisation de la conception des réfrigérateurs magnétiques [texte imprimé] / M. Risser, Auteur ; C. Vasile, Auteur ; C. Muller, Auteur . - 2013 . - pp. 950–957. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 950–957 Mots-clés : Magnetocaloric  refrigerator;  Modelling;  Thermodynamic  cycle;  Exergy;  Gadolinium Résumé : Magnetocaloric systems are interesting from the point of view of energy efficiency and could be environment-friendly products. Numerous prototypes have demonstrated the feasibility of such systems for applications around room temperature, but there is still room for improvement. The research of an optimal configuration only by an experimental approach is a complex and difficult task due to numerous building parameters and driving parameters. Therefore we propose here a methodology based on a numerical approach. A numerical model calibrated with respect to experimental tests is used to make a parametric analysis of a magnetocaloric system. The design of the system is made according to given functional specifications, targeting different design strategies such as the power density, the energy efficiency, the maximizing of the temperature span, etc. This work is a step forward to the increase of the efficiency in the design of our future systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002721

Magnetic heat pumps / J. M. Gatti 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. 165–175 Titre : Magnetic heat pumps : configurable hydraulic distribution for a magnetic cooling system=Distribution hydraulique configurable pour un système de froid magnétique Titre original : Pompe à chaleur magnétiques Type de document : texte imprimé Auteurs : J. M. Gatti, Auteur ; C. Muller, Auteur ; C. Vasile, Auteur Année de publication : 2014 Article en page(s) : pp. 165–175 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetocaloric  heat  pump;  hydraulic  distribution;  linear  system;  rotary  system;  AMRR  cycle;  dynamic  seal Résumé : Magnetic cooling technology has experienced significant developments over the last five years. Most of the magneto-caloric prototypes use magneto-caloric alloys subject to variable magnetic field and coolant flow synchronized with the magnetisation/demagnetisation cycles. Hydraulic flow regulation has a major impact on the AMRR cycle and on the performance of the magnetic heat pump. This paper discloses a hydraulic solution implemented in a two stage linear prototype, where the volume, the flow rate and the coolant velocity can be controlled. The dynamic sealing of the system is also described, as well as the performance of a two stage prototype integrating this hydraulic distribution solution to this first generation solution. A brief description of a third generation ‘rotative’ architecture is provided, with results obtained just after the last Thermag V conference. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002399 [article] Magnetic heat pumps = Pompe à chaleur magnétiques : configurable hydraulic distribution for a magnetic cooling system=Distribution hydraulique configurable pour un système de froid magnétique [texte imprimé] / J. M. Gatti, Auteur ; C. Muller, Auteur ; C. Vasile, Auteur . - 2014 . - pp. 165–175. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 165–175 Mots-clés : Magnetocaloric  heat  pump;  hydraulic  distribution;  linear  system;  rotary  system;  AMRR  cycle;  dynamic  seal Résumé : Magnetic cooling technology has experienced significant developments over the last five years. Most of the magneto-caloric prototypes use magneto-caloric alloys subject to variable magnetic field and coolant flow synchronized with the magnetisation/demagnetisation cycles. Hydraulic flow regulation has a major impact on the AMRR cycle and on the performance of the magnetic heat pump. This paper discloses a hydraulic solution implemented in a two stage linear prototype, where the volume, the flow rate and the coolant velocity can be controlled. The dynamic sealing of the system is also described, as well as the performance of a two stage prototype integrating this hydraulic distribution solution to this first generation solution. A brief description of a third generation ‘rotative’ architecture is provided, with results obtained just after the last Thermag V conference. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002399