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Une méthode pour ajuster la charge en frigorigène dans la modélisation de performance d'équipements monobloc (RP-1173) en dehors des conditions prévues lors de la conception.

A method for tuning refrigerant charge in modelling off-design performance of unitary equipment (RP-1173).

Auteurs : SHEN B., BRAUN J. E., GROLL E. A.

Type d'article : Article

Résumé

Existing models do not accurately predict the effect of off-design refrigerant charge even when tuned at the design operating condition. Based on experimental testing and theoretical analyses, multiple factors that cause inaccuracies in charge prediction are identified in this paper. The factors include unaccounted liquid volumes, refrigerant dissolved in the compressor lubricant, inaccurate void fraction models, and an inaccurate estimate of the subcooled liquid length. Some of these factors lead to errors that change with operating conditions and amount of charge. The paper presents a method for adjusting refrigerant charge using a charge correction equation that requires data for two operating points for parameter tuning.

Détails

  • Titre original : A method for tuning refrigerant charge in modelling off-design performance of unitary equipment (RP-1173).
  • Identifiant de la fiche : 2006-2583
  • Langues : Anglais
  • Source : HVAC&R Research - vol. 12 - n. 3
  • Date d'édition : 07/2006

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