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Performance evaluation of a virtual refrigerant charge sensor / Kim, Woohyun in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1130–1141 Titre : Performance evaluation of a virtual refrigerant charge sensor Titre original : Evaluation de la performance d'un capteur de la charge en frigorigène virtuelle Type de document : texte imprimé Auteurs : Kim, Woohyun, Auteur ; James E. Braun, Auteur Année de publication : 2013 Article en page(s) : pp. 1130–1141 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Air  conditioner;  Refrigerant  charge;  Sensor;  Refrigerant  leakage;  Fault  detection Résumé : The primary goal was to evaluate and enhance a virtual refrigerant charge (VRC) sensor developed by Li and Braun (2006, 2009). Based on the evaluation, the VRC sensor was found to work well in estimating refrigerant charge for systems that do not utilize accumulators when using the default parameters. For systems with accumulators, however, the parameters needed to be improved for better accuracy. To overcome those limitations, a simulation method for estimating parameters was developed that depends on test data at rated conditions and system information. The simulation parameters decreased the errors between the actual and predicted charge. Even better performance was achieved for the VRC sensor when the parameters were tuned by minimizing charge prediction errors using test data and linear regression. The overall RMS error for the VRC sensors using tuned parameters was 3.8% over a wide range of operating conditions for different types of systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003039 [article] Performance evaluation of a virtual refrigerant charge sensor = Evaluation de la performance d'un capteur de la charge en frigorigène virtuelle [texte imprimé] / Kim, Woohyun, Auteur ; James E. Braun, Auteur . - 2013 . - pp. 1130–1141. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1130–1141 Mots-clés : Air  conditioner;  Refrigerant  charge;  Sensor;  Refrigerant  leakage;  Fault  detection Résumé : The primary goal was to evaluate and enhance a virtual refrigerant charge (VRC) sensor developed by Li and Braun (2006, 2009). Based on the evaluation, the VRC sensor was found to work well in estimating refrigerant charge for systems that do not utilize accumulators when using the default parameters. For systems with accumulators, however, the parameters needed to be improved for better accuracy. To overcome those limitations, a simulation method for estimating parameters was developed that depends on test data at rated conditions and system information. The simulation parameters decreased the errors between the actual and predicted charge. Even better performance was achieved for the VRC sensor when the parameters were tuned by minimizing charge prediction errors using test data and linear regression. The overall RMS error for the VRC sensors using tuned parameters was 3.8% over a wide range of operating conditions for different types of systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003039