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Distribution de la charge en frigorigène d'un réfrigérateur domestique. I. Conditions transitoires.

Refrigerant mass charge distribution in a domestic refrigerator. I. Transient conditions.

Auteurs : BJÖRK E., PALM B.

Type d'article : Article

Résumé

Experimental results are presented of the refrigerant mass charge distribution in a steadily cycling domestic refrigerator. It is shown in detail how the charge is displaced at compressor start-up and shut-down. At start-up it was found that the charge was temporarily displaced towards the condenser before returning to a steady state distribution in the latter part of the on-period. As a result, initially the evaporator was starved with a lowered evaporation temperature and a peak 10°C superheat. The superheat disappeared within 3 min as the evaporator was gradually refilled with refrigerant. At shut-down the pressure equalised within 3 min as refrigerant was pushed into the evaporator from the condenser. The losses due to charge displacements were estimated to 11% (capacity) and 9% (efficiency). Possible ways to reduce the losses are discussed. [Reprinted with permission from Elsevier. Copyright, 2005]. See also this Bulletin, reference 2006-2408.

Détails

  • Titre original : Refrigerant mass charge distribution in a domestic refrigerator. I. Transient conditions.
  • Identifiant de la fiche : 2006-2409
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 26 - n. 8-9
  • Date d'édition : 06/2006

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