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Steady-state hybrid modeling of economized screw water chillers using polynomial neural network compressor model / Ling-Xiao Zhao in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 729-738 Titre : Steady-state hybrid modeling of economized screw water chillers using polynomial neural network compressor model Titre original : Modélisation hybride en régime permanent des refroidisseurs d’eau à vis munis d’économiseur, à l’aide d’un modèle polynomial à réseau neuronal Type de document : texte imprimé Auteurs : Ling-Xiao Zhao, Auteur ; Liang-Liang Shao, Auteur ; Chun-Lu Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 729-738 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Liquid  chiller  Screw  compressor  Injection  Modelling  Performance  Neural  network Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents steady-state hybrid modeling and analysis of water chillers with economized screw compressors using intermediate gas injection. The hybrid chiller model consists of the polynomial neural network compressor model and other component models grounded on the first principles. The polynomial neural network compressor model works for all full-load and part-load conditions, both economized and non-economized modes. Good agreement between the predicted and measured performance of two compressors from the manufacturer is reached ranging from full-load to unload conditions. The hybrid chiller model predictions on the performance of two chillers agree with the test data within ±5% errors. Based on the validated model, further investigation on the optimal switch points between the economized and non-economized mode is conducted, which can be used to precisely improve the part-load performance of chillers. A simple linear correlation for switching the economized and non-economized mode is proposed as well. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000095 [article] Steady-state hybrid modeling of economized screw water chillers using polynomial neural network compressor model = Modélisation hybride en régime permanent des refroidisseurs d’eau à vis munis d’économiseur, à l’aide d’un modèle polynomial à réseau neuronal [texte imprimé] / Ling-Xiao Zhao, Auteur ; Liang-Liang Shao, Auteur ; Chun-Lu Zhang, Auteur . - 2010 . - pp. 729-738. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 729-738 Mots-clés : Liquid  chiller  Screw  compressor  Injection  Modelling  Performance  Neural  network Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents steady-state hybrid modeling and analysis of water chillers with economized screw compressors using intermediate gas injection. The hybrid chiller model consists of the polynomial neural network compressor model and other component models grounded on the first principles. The polynomial neural network compressor model works for all full-load and part-load conditions, both economized and non-economized modes. Good agreement between the predicted and measured performance of two compressors from the manufacturer is reached ranging from full-load to unload conditions. The hybrid chiller model predictions on the performance of two chillers agree with the test data within ±5% errors. Based on the validated model, further investigation on the optimal switch points between the economized and non-economized mode is conducted, which can be used to precisely improve the part-load performance of chillers. A simple linear correlation for switching the economized and non-economized mode is proposed as well. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000095