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

H. Y. Kim, B. B. Saha, S. Koyama

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

This study deals with an experimental investigation for a counter-current slug flow absorber, working with ammonia-water mixture, for significantly low solution flow rate conditions that are required for operating as the GAX (generator absorber heat exchanger) cycle. It is 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, is observed, while dry patch on the tube wall are not observed. The liquid film at the slug flow region has smooth gas-liquid interface structure without apparent wavy motion. The local heat transfer rate is measured by varying main parameters, namely, ammonia gas flow rate, solution flow rate, ammonia concentration of inlet solution and coolant inlet conditions. The heat transfer rate while absorption is taking place is higher than that after absorption has ended. The absorption length is greatly influenced by varying main parameters, due to flow conditions and thermal conditions.

Original languageEnglish
Pages (from-to)508-515
Number of pages8
JournalInternational Journal of Refrigeration
Volume26
Issue number5
DOIs
Publication statusPublished - Aug 1 2003

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Gastropoda
slugs
Ammonia
ammonia
Hot Temperature
Flow rate
Water
Gases
water
Heat transfer
Liquid films
Coolants
Flow patterns
Heat exchangers
Flow of gases
gases
Visualization
heat transfer
Liquids
liquids

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

Cite this

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