Review on the experimental studies of refrigerant flow mechanisms inside short-tube orifices / Kitti Nilpueng in International journal of refrigeration, Vol. 35 N° 1 (Janvier 2012)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 27–35 Titre : Review on the experimental studies of refrigerant flow mechanisms inside short-tube orifices Titre original : Passage en revue des études expérimentales sur les mécanismes du débit du frigorigène dans les orifices de tubes courts Type de document : texte imprimé Auteurs : Kitti Nilpueng, Auteur ; Somchai Wongwises, Auteur Année de publication : 2012 Article en page(s) : pp. 27–35 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Expansion valve Flow rate Critical pressure Temperature variation Résumé : A short-tube orifice is a kind of an expansion device. The advantages of a short-tube orifice are simplicity, low cost, and low starting torque of the compressor as the pressures across the short-tube orifice equalise during the off-cycle. The two-phase flow mechanisms of refrigerant inside the short-tube orifice are very complicated although its physical configurations are simple. During the past decade, investigations of the mass flow rate of various refrigerants inside short-tube orifices, which is useful for selecting the proper size in practical applications, have been reported by many researchers. However, few researchers focused on the flow pattern, choked flow, and metastable flow phenomena inside short-tube orifices, which are necessary for a clear understanding of the flow behaviour and developing suitable calculation techniques. The aim of this paper is to summarise the evolution of the experimental research on refrigerant flow characteristics inside short-tube orifices to provide guidelines for future research. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002271 [article] Review on the experimental studies of refrigerant flow mechanisms inside short-tube orifices = Passage en revue des études expérimentales sur les mécanismes du débit du frigorigène dans les orifices de tubes courts [texte imprimé] / Kitti Nilpueng, Auteur ; Somchai Wongwises, Auteur . - 2012 . - pp. 27–35. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 27–35 Mots-clés : Expansion valve Flow rate Critical pressure Temperature variation Résumé : A short-tube orifice is a kind of an expansion device. The advantages of a short-tube orifice are simplicity, low cost, and low starting torque of the compressor as the pressures across the short-tube orifice equalise during the off-cycle. The two-phase flow mechanisms of refrigerant inside the short-tube orifice are very complicated although its physical configurations are simple. During the past decade, investigations of the mass flow rate of various refrigerants inside short-tube orifices, which is useful for selecting the proper size in practical applications, have been reported by many researchers. However, few researchers focused on the flow pattern, choked flow, and metastable flow phenomena inside short-tube orifices, which are necessary for a clear understanding of the flow behaviour and developing suitable calculation techniques. The aim of this paper is to summarise the evolution of the experimental research on refrigerant flow characteristics inside short-tube orifices to provide guidelines for future research. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002271

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