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Corrélation pour prédire les conditions qui conduisent à un noyage de liquide au démarrage du compresseur en fonction de la taille de l'évaporateur et des propriétés du fluide.

Correlation to predict conditions that lead to liquid-flooding at compressor start-up as a function of evaporator size and fluid properties.

Auteurs : BRENDEL L. P. M., PRANATHARTHI HARAN S., LIU H., BRAUN J. E., GROLL E. A.

Type d'article : Article de la RIF

Résumé

Refrigeration cycles with fixed speed compressors cycle on and off to modulate their time averaged cooling capacity. While the cycles are turned off, refrigerant can migrate from the condenser into the colder evaporator. The next start-up process can then pull liquid refrigerant out of the evaporator and into the compressor causing liquid flooding. This phenomenon results in a loss of latent heat for cooling, can undercool the lubricant, and may cause damage to the compression mechanism. The geometric and thermophysical conditions that lead to liquid flooding are poorly understood. Experimental data collected for four refrigerants and three heat exchangers was analyzed for flooding conditions. A correlation was fitted to the experimental data, predicting the experimentally determined charge threshold for flooding with an average deviation of 6.6% and a maximum deviation of 16.7%. Repeating the tests with other heat exchanger types and smaller or larger compressors is suggested as important future work.

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Format PDF

Pages : 349-356

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    20 €

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Détails

  • Titre original : Correlation to predict conditions that lead to liquid-flooding at compressor start-up as a function of evaporator size and fluid properties.
  • Identifiant de la fiche : 30030914
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 146
  • Date d'édition : 02/2023
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2022.11.017

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