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Predicting off-design range and performance of refrigeration cycle with two-stage centrifugal compressor and flash intercooler / Teemu Turunen-Saaresti in International journal of refrigeration, Vol. 33 N° 6 (Septembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1152-1160 Titre : Predicting off-design range and performance of refrigeration cycle with two-stage centrifugal compressor and flash intercooler Titre original : Prévision des conditions non prévues dans la conception, et prévision de la performance d'un cycle frigorifique à compresseur centrifuge biétagé muni d'un refroidisseur intermédiaire instantané Type de document : texte imprimé Auteurs : Teemu Turunen-Saaresti, Auteur ; Pekka Röyttä, Auteur ; Juha Honkatukia, Auteur Année de publication : 2010 Article en page(s) : pp. 1152-1160 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Compression  system  Two-stage  system  Centrifugal  compressor  Intercooler  Performance-optimisation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A modern refrigeration process requires constant control to provide required cooling for the user. To properly and economically accommodate this need, a wide operation range of the compressor is necessary. Therefore, it is of interest to investigate the off-design operation of a cooling cycle and compressor. The refrigeration cycle equipped with a two-stage centrifugal compressor and a flash intercooler is studied. The compressor operation maps are generated with two different design codes and the operation values of the compressors are interpolated from the compressor maps in the simulation of the entire cooling cycle. Based on the previous studies of the utilised refrigeration cycle, R245fa is selected as coolant. The aim of this study is to demonstrate the control capacity of the centrifugal compressor and the performance of the cooling loop in off-design conditions. This configuration provides better and wider control over the cooling range than the traditional on-off control of displacement compressors. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000782 [article] Predicting off-design range and performance of refrigeration cycle with two-stage centrifugal compressor and flash intercooler = Prévision des conditions non prévues dans la conception, et prévision de la performance d'un cycle frigorifique à compresseur centrifuge biétagé muni d'un refroidisseur intermédiaire instantané [texte imprimé] / Teemu Turunen-Saaresti, Auteur ; Pekka Röyttä, Auteur ; Juha Honkatukia, Auteur . - 2010 . - pp. 1152-1160. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1152-1160 Mots-clés : Refrigeration  system  Compression  system  Two-stage  system  Centrifugal  compressor  Intercooler  Performance-optimisation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A modern refrigeration process requires constant control to provide required cooling for the user. To properly and economically accommodate this need, a wide operation range of the compressor is necessary. Therefore, it is of interest to investigate the off-design operation of a cooling cycle and compressor. The refrigeration cycle equipped with a two-stage centrifugal compressor and a flash intercooler is studied. The compressor operation maps are generated with two different design codes and the operation values of the compressors are interpolated from the compressor maps in the simulation of the entire cooling cycle. Based on the previous studies of the utilised refrigeration cycle, R245fa is selected as coolant. The aim of this study is to demonstrate the control capacity of the centrifugal compressor and the performance of the cooling loop in off-design conditions. This configuration provides better and wider control over the cooling range than the traditional on-off control of displacement compressors. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000782