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Document IIF

Développement d'un absorbeur à ammoniac/eau à écoulement turbulent par à coups. Partie I. caractérisation de l'écoulement et étude expérimentale.

Development of a slug flow absorber working with an ammonia-water mixture. Part I. flow characterization and experimental investigation.

Auteurs : KIM H. Y., SAHA B. B., KOYAMA S.

Type d'article : Article, Article de la RIF

Résumé

This study deals with the experimental investigation of a counter-current slug flow absorber, working with ammonia-water mixture, for significantly low solution flow rate conditions that are required for operating as a GAX (generator absorber heat exchanger) cycle. It was confirmed that the slug flow absorber operates well at the low solution flow rate conditions. From visualization results of the flow pattern, frost flow just after the gas inlet, followed by slug flow with well-shaped Taylor bubble, was observed, while no dry patches on the tube wall were observed. The liquid film in the slug flow region had a smooth gas-liquid interface structure without apparent wavy motion. The local heat transfer rate was measured by varying key parameters, namely, ammonia gas flow rate, solution flow rate, ammonia concentration of inlet solution and coolant inlet conditions. The heat transfer rate while absorption was taking place was higher than that after absorption had ended. The absorption length was greatly influenced by varying the key parameters, due to flow and thermal conditions.

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Format PDF

Pages : 508-515

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    20 €

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Détails

  • Titre original : Development of a slug flow absorber working with an ammonia-water mixture. Part I. flow characterization and experimental investigation.
  • Identifiant de la fiche : 2003-2224
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 5
  • Date d'édition : 08/2003

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