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Long-period food storage household vertical freezer: Refrigerant charge influence on working conditions during steady operation / F. De Rossi in International journal of refrigeration, Vol. 34 N° 5 (Août 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1305-1314 Titre : Long-period food storage household vertical freezer: Refrigerant charge influence on working conditions during steady operation Titre original : Congélateur domestique utilisé pour le stockage à long terme des surgelés: l'influence de la charge en frigorigène sur les conditions de fonctionnement en régime permanent Type de document : texte imprimé Auteurs : F. De Rossi, Auteur ; A.W. Mauro, Auteur ; M. Musto, Auteur Année de publication : 2011 Article en page(s) : pp. 1305-1314 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Freezer  Performance  Refrigerant  Charge Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Long-period food storage vertical freezers are small cooling capacity appliances usually working with HC. The particular system architecture and the small thermal load allow the use of natural draft wires and tube heat exchangers with large heat transfer areas. Despite of the good performance achieved, high refrigerant charges with respect to the cooling capacity of the system are required, due to the high volumes of the heat exchangers. In this work an experimental analysis of an apparatus with a typical arrangement of the heat exchangers and capillary tube is presented. The system was first designed according to the current standards to reach high performances. Then the working conditions of the system were completely characterized experimentally in the whole range of refrigerant charges compatible with steady operation. Some general conclusions about the systems with this kind of architecture are furnished about the determination of the thermodynamic optimum operating condition and, hence, the determination of the optimum charge. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002665 [article] Long-period food storage household vertical freezer: Refrigerant charge influence on working conditions during steady operation = Congélateur domestique utilisé pour le stockage à long terme des surgelés: l'influence de la charge en frigorigène sur les conditions de fonctionnement en régime permanent [texte imprimé] / F. De Rossi, Auteur ; A.W. Mauro, Auteur ; M. Musto, Auteur . - 2011 . - pp. 1305-1314. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1305-1314 Mots-clés : Freezer  Performance  Refrigerant  Charge Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Long-period food storage vertical freezers are small cooling capacity appliances usually working with HC. The particular system architecture and the small thermal load allow the use of natural draft wires and tube heat exchangers with large heat transfer areas. Despite of the good performance achieved, high refrigerant charges with respect to the cooling capacity of the system are required, due to the high volumes of the heat exchangers. In this work an experimental analysis of an apparatus with a typical arrangement of the heat exchangers and capillary tube is presented. The system was first designed according to the current standards to reach high performances. Then the working conditions of the system were completely characterized experimentally in the whole range of refrigerant charges compatible with steady operation. Some general conclusions about the systems with this kind of architecture are furnished about the determination of the thermodynamic optimum operating condition and, hence, the determination of the optimum charge. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002665