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Thermal analysis of the defrost cycle in a domestic freezer / Pradeep Bansal in International journal of refrigeration, Vol. 33 N° 3 (Mai 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 589-599 Titre : Thermal analysis of the defrost cycle in a domestic freezer Titre original : Analyse thermique du cycle de dégivrage d'un congélateur domestique Type de document : texte imprimé Auteurs : Pradeep Bansal, Auteur ; David Fothergill, Auteur ; Ryan Fernandes, Auteur Année de publication : 2010 Article en page(s) : pp. 589-599 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigerator-freezer  Calculation  Heat  transfer  Defrosting  Experiment  Efficiency  Energy  consumption Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents a thermal analysis of a defrost cycle in order to design more efficient defrosting mechanisms in household refrigerators and freezers. A simple heat transfer model has been developed to determine energy flows from a defrost heater across various components of a refrigerator/freezer. The study measures power consumption and temperatures of a single temperature vertical empty freezer (in normal operation with and without defrosts) to determine the heat distribution from the radiant type electric defrost heater and its effect on power consumption. The surface temperature of the defrost heater was measured to be 520 °C for minimal frost and 560 °C for heavy frost. The efficiency of a defrost heater was measured to be 30.3%, while power consumption of the freezer was found to increase by 17.7% due to automatic defrost. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900276X [article] Thermal analysis of the defrost cycle in a domestic freezer = Analyse thermique du cycle de dégivrage d'un congélateur domestique [texte imprimé] / Pradeep Bansal, Auteur ; David Fothergill, Auteur ; Ryan Fernandes, Auteur . - 2010 . - pp. 589-599. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 589-599 Mots-clés : Refrigerator-freezer  Calculation  Heat  transfer  Defrosting  Experiment  Efficiency  Energy  consumption Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents a thermal analysis of a defrost cycle in order to design more efficient defrosting mechanisms in household refrigerators and freezers. A simple heat transfer model has been developed to determine energy flows from a defrost heater across various components of a refrigerator/freezer. The study measures power consumption and temperatures of a single temperature vertical empty freezer (in normal operation with and without defrosts) to determine the heat distribution from the radiant type electric defrost heater and its effect on power consumption. The surface temperature of the defrost heater was measured to be 520 °C for minimal frost and 560 °C for heavy frost. The efficiency of a defrost heater was measured to be 30.3%, while power consumption of the freezer was found to increase by 17.7% due to automatic defrost. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900276X