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Experimental correlation of combined heat and mass transfer for ammonia-water falling film absorption.

Author(s) : KANG Y. T., AKISAWA A., KASHIWAGI T.

Type of article: Article, IJR article

Summary

Experimental analysis was performed for ammonia-water falling film absorption process in a plate heat exchanger with enhanced surfaces such as offset strip fin. The article examines the effects of liquid and vapour flow characteristics, inlet subcooling of the liquid flow and inlet concentration difference on heat and mass transfer performance. The inlet liquid concentration was selected as 5, 10 and 15% of ammonia by mass while the inlet vapour concentration was varied from 64.7 to 79.7%. It was found that before absorption started, there was a rectification process as the top of the test section by the inlet subcooling effect. Water desorption phenomenon was found near the bottom of the test section. It was found that the lower inlet liquid temperature and the higher inlet vapour temperature, the higher Nusselt and Sherwood numbers are obtained.

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Pages: 250-262

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Details

  • Original title: Experimental correlation of combined heat and mass transfer for ammonia-water falling film absorption.
  • Record ID : 1999-2896
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 4
  • Publication date: 1999/06

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