Experimental analysis of a new method for overfeeding multiple evaporators in refrigeration systems / Silvia Minetto in International journal of refrigeration, Vol. 38 (Février 2014)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 38 (Février 2014) . - pp. 1–9 Titre : Experimental analysis of a new method for overfeeding multiple evaporators in refrigeration systems Titre original : Analyse expérimentale d'une nouvelle méthode pour la suralimentation d'évaporateurs multiples dans des systèmes frigorifiques Type de document : texte imprimé Auteurs : Silvia Minetto, Auteur ; Riccardo Brignoli, Auteur ; Claudio Zilio, Auteur Année de publication : 2014 Article en page(s) : pp. 1–9 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : CO2  Flooded evaporator  Thermostatic valve  Ejector  Transcritical cycle Résumé : An innovative method for feeding flooded evaporators, arranged in parallel in R744 plants, is presented. In order to promote evaporators overfeeding, an ejector circulates liquid from the low pressure receiver back to the intermediate pressure receiver. Since there is not a need for superheat at the evaporator exit, each evaporator expansion valve can be controlled by a signal representative, either of the evaporator load, or the evaporator performance, such as the air temperature at its inlet or outlet. When compared to dry-expansion evaporator systems, the proposed solution offers energy saving and smooth operating conditions, typical of flooded evaporators, while still maintaining a simple plant lay-out. The concept was experimentally validated: the evaporators were maintained in flooded conditions, while the ejector was able to promote liquid recirculation. Direct comparison with dry-expansion operations was performed. The suggested method is mainly intended for commercial refrigeration plants, where many evaporators are arranged in parallel. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002788 [article] Experimental analysis of a new method for overfeeding multiple evaporators in refrigeration systems = Analyse expérimentale d'une nouvelle méthode pour la suralimentation d'évaporateurs multiples dans des systèmes frigorifiques [texte imprimé] / Silvia Minetto, Auteur ; Riccardo Brignoli, Auteur ; Claudio Zilio, Auteur . - 2014 . - pp. 1–9. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 1–9 Mots-clés : CO2  Flooded evaporator  Thermostatic valve  Ejector  Transcritical cycle Résumé : An innovative method for feeding flooded evaporators, arranged in parallel in R744 plants, is presented. In order to promote evaporators overfeeding, an ejector circulates liquid from the low pressure receiver back to the intermediate pressure receiver. Since there is not a need for superheat at the evaporator exit, each evaporator expansion valve can be controlled by a signal representative, either of the evaporator load, or the evaporator performance, such as the air temperature at its inlet or outlet. When compared to dry-expansion evaporator systems, the proposed solution offers energy saving and smooth operating conditions, typical of flooded evaporators, while still maintaining a simple plant lay-out. The concept was experimentally validated: the evaporators were maintained in flooded conditions, while the ejector was able to promote liquid recirculation. Direct comparison with dry-expansion operations was performed. The suggested method is mainly intended for commercial refrigeration plants, where many evaporators are arranged in parallel. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002788

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