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Improved energy performance of a refrigerating machine using water spray upstream of the condenser / J. Tissot in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 93–105 Titre : Improved energy performance of a refrigerating machine using water spray upstream of the condenser Titre original : Performance énergétique améliorée d'un système frigorifique utilisant une aspersion d'eau en amont du condenseur Type de document : texte imprimé Auteurs : J. Tissot, Auteur ; P. Boulet, Auteur ; F. Trinquet, Auteur Année de publication : 2014 Article en page(s) : pp. 93–105 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Heat  pump;  Condenser;  Spray;  Evaporation;  Energy Résumé : An experimental and numerical study has been carried out on the improvement of the energy performance of a refrigerating machine using a water spray upstream of the condenser. The experimental setup is based on a reversible heat pump used in cooling mode. The spray has been simply added upstream from the heat pump in order to investigate the possible performance improvements on a real machine, leaving its own control system free to adapt itself. Condensation temperature and pressure data have been measured on the refrigerating fluid side, while temperature and humidity have been measured on the air upstream and downstream the condenser. A complete model has been developed, combining a thermodynamic model for the system and heat transfer models on the air and refrigerating fluid sides. Comparisons have been carried out. Results show that water spraying upstream of the condenser may increase the global COP of the system (refrigerating machine plus spraying system) up to 28.9% for relatively hot and dry air conditions (relative humidity 19,7% and temperature 308 K). En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002429 [article] Improved energy performance of a refrigerating machine using water spray upstream of the condenser = Performance énergétique améliorée d'un système frigorifique utilisant une aspersion d'eau en amont du condenseur [texte imprimé] / J. Tissot, Auteur ; P. Boulet, Auteur ; F. Trinquet, Auteur . - 2014 . - pp. 93–105. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 93–105 Mots-clés : Heat  pump;  Condenser;  Spray;  Evaporation;  Energy Résumé : An experimental and numerical study has been carried out on the improvement of the energy performance of a refrigerating machine using a water spray upstream of the condenser. The experimental setup is based on a reversible heat pump used in cooling mode. The spray has been simply added upstream from the heat pump in order to investigate the possible performance improvements on a real machine, leaving its own control system free to adapt itself. Condensation temperature and pressure data have been measured on the refrigerating fluid side, while temperature and humidity have been measured on the air upstream and downstream the condenser. A complete model has been developed, combining a thermodynamic model for the system and heat transfer models on the air and refrigerating fluid sides. Comparisons have been carried out. Results show that water spraying upstream of the condenser may increase the global COP of the system (refrigerating machine plus spraying system) up to 28.9% for relatively hot and dry air conditions (relative humidity 19,7% and temperature 308 K). En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002429