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Development of a slug flow absorber working with ammonia-water mixture. Part II. Data reduction model for local heat and mass transfer characterization.

Author(s) : KIM H. Y., SAHA B. B., KOYAMA S.

Type of article: Article, IJR article

Summary

This study deals with a data reduction model for clarifying experimental results of a counter-current slug flow absorber, working with ammonia-water mixture, for significantly low solution flow rate conditions. A data reduction model to obtain the local heat and mass transfer coefficient on the liquid side is proposed by using the drift flux model to analyse the flow characteristics. The control volume method and heat and mass transfer analogy are employed to solve the combined heat and mass transfer problem. As a result, it is found that the local heat and mass transfer coefficient on the liquid side of the absorber is greatly influenced by the flow pattern. The heat and mass transfer coefficient at the frost flow region is higher than that at the slug flow region due to flow disturbance and random fluctuation. The solution flow rate and gas flow rate have an influence on the local heat and mass transfer coefficient at the frost flow region. However, it is insignificant at the slug flow region.

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Pages: 698-706

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Details

  • Original title: Development of a slug flow absorber working with ammonia-water mixture. Part II. Data reduction model for local heat and mass transfer characterization.
  • Record ID : 2004-0085
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 6
  • Publication date: 2003/09

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