Mass transfer correlation of NH3-H2O bubble absorption

Yong Tae Kang, T. Nagano, Takao Kashiwagi

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The objectives of this paper are to study the effect of key parameters on absorption performance and to develop an experimental correlation of mass transfer coefficient for ammonia-water bubble absorption. The orifice diameter, liquid concentration and vapor velocity are considered as the key parameters. This study successfully visualized the bubble behavior and measured the volumetric diameter of bubbles during the bubble absorption process. The bubble absorption is grouped into two processes, bubble growth (process I) and bubble disappearance (process II), respectively. The following conclusions were drawn from the present study. A new experimental correlation for the volumetric bubble diameter was proposed with ± 15% error band, which could be applied to calculate the mass transfer coefficient. The mass transfer coefficient increased with a decrease of the liquid concentration. In process II, the mass transfer coefficient increased with an increase of the Galileo number. Finally, experimental correlations of mass transfer coefficient were developed for processes I and II with ± 18% error bands.

Original languageEnglish
Pages (from-to)878-886
Number of pages9
JournalInternational Journal of Refrigeration
Issue number7
Publication statusPublished - 2002 Nov
Externally publishedYes


  • Ammonia
  • Bubble
  • Heat transfer
  • Modelling
  • Solution
  • Water

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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