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Comparison of the transient behavior of microchannel and fin-and-tube evaporators / Gunda Mader in International journal of refrigeration, Vol. 34 N° 5 (Août 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1222-1229 Titre : Comparison of the transient behavior of microchannel and fin-and-tube evaporators Titre original : Comparaison du comportement transitoire des évaporateurs à microcanaux à tubes ailetés Type de document : texte imprimé Auteurs : Gunda Mader, Auteur ; Georg P.F. Fösel, Auteur ; Lars F.S. Larsen, Auteur Année de publication : 2011 Article en page(s) : pp. 1222-1229 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Air  conditioning  Evaporator  Microchannel  Transient  state  Modeling Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The development of control algorithms for refrigeration systems requires models capable of simulating transient behavior with sensible computational time and effort. The most pronounced dynamics in these systems are found in the condenser and the evaporator, especially the transient behavior of the evaporator is of great importance when designing and tuning controllers for refrigeration systems. Various so called moving boundary models were developed for capturing these dynamics and showed to cover the important characteristics. A factor that has significant influence on the time constant and nonlinear behavior of a system is the amount of refrigerant charge in the evaporator which is considerably reduced when microchannel heat exchangers are utilized. Here a moving boundary model is used and adapted to simulate and compare the transient behavior of a microchannel evaporator with a fin-and-tube evaporator for a residential air-conditioning system. The results are validated experimentally at a test rig. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000247 [article] Comparison of the transient behavior of microchannel and fin-and-tube evaporators = Comparaison du comportement transitoire des évaporateurs à microcanaux à tubes ailetés [texte imprimé] / Gunda Mader, Auteur ; Georg P.F. Fösel, Auteur ; Lars F.S. Larsen, Auteur . - 2011 . - pp. 1222-1229. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1222-1229 Mots-clés : Air  conditioning  Evaporator  Microchannel  Transient  state  Modeling Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The development of control algorithms for refrigeration systems requires models capable of simulating transient behavior with sensible computational time and effort. The most pronounced dynamics in these systems are found in the condenser and the evaporator, especially the transient behavior of the evaporator is of great importance when designing and tuning controllers for refrigeration systems. Various so called moving boundary models were developed for capturing these dynamics and showed to cover the important characteristics. A factor that has significant influence on the time constant and nonlinear behavior of a system is the amount of refrigerant charge in the evaporator which is considerably reduced when microchannel heat exchangers are utilized. Here a moving boundary model is used and adapted to simulate and compare the transient behavior of a microchannel evaporator with a fin-and-tube evaporator for a residential air-conditioning system. The results are validated experimentally at a test rig. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000247