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Document IIF

Compensation de la mauvaise distribution de l'écoulement dans les évaporateurs à tubes ailetés utilisés dans le conditionnement d'air résidentiel.

Compensation of flow maldistribution in fin-and-tube evaporators for residential air conditioning.

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

Type d'article : Article, Article de la RIF

Résumé

Compensation of flow maldistribution in multi-channel fin-and-tube evaporators for residential air-conditioning is investigated by numerical modeling. The considered sources of maldistribution are distribution of the liquid and vapor phases in the distributor and non-uniform airflow distribution. Fin-and-tube heat exchangers usually have a predefined circuitry, however, the evaporator model is simplified to have straight tubes, in order to perform a generic investigation. The compensation of flow maldistribution is performed by control of the superheat in the individual channels. Furthermore, the effect of combinations of individual maldistribution sources is investigated for different evaporator sizes and outdoor temperatures. It is shown that a decrease in cooling capacity and coefficient of performance by flow maldistribution can be compensated by the control of individual channel superheat. Alternatively, a larger evaporator may be used.

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Format PDF

Pages : 1230-1237

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    20 €

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    Gratuit

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Détails

  • Titre original : Compensation of flow maldistribution in fin-and-tube evaporators for residential air conditioning.
  • Identifiant de la fiche : 30000962
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 5
  • Date d'édition : 08/2011

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