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Performance of residential air-conditioning systems with flow maldistribution in fin-and-tube evaporators.

Performance des systèmes de conditionnement d'air résidentiels avec une mauvaise distribution de l'écoulement dans les évaporateurs à tubes ailetés.

Auteurs : KAERN M. R., BRIX W., ELMEGAARD B., et al.

Type d'article : Article, Article de la RIF

Résumé

Refrigerant and airflow maldistribution in fin-and-tube evaporators for residential air conditioning was investigated with numerical modelling. Fin-and-tube heat exchangers usually have a pre-defined circuitry. However, the objective in this study was to perform a generic investigation of each individual maldistribution source in an independent manner. Therefore, the evaporator and the condenser were simplified to be straight tubes for the purposes of this study. The numerical model of the R410A system, its verification and an investigation of individual maldistribution sources are presented in this paper. The maldistribution sources of interest were: inlet liquid/vapour phase distribution, feeder tube bending and airflow distribution. The results show that maldistribution reduced the cooling capacity and the coefficient of performance of the system. In particular, different phase distribution and non-uniform airflow distribution reduced the performance significantly. Different feeder tube bendings only caused a minor decrease in performance.

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Format PDF

Pages : pp. 696-706

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    15 €

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Détails

  • Titre original : Performance of residential air-conditioning systems with flow maldistribution in fin-and-tube evaporators.
  • Identifiant de la fiche : 2011-0292
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 3
  • Date d'édition : 05/2011

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