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Experimental study of the influence of additives on ammonia bubble absorption.

[In Chinese. / En chinois.]

Author(s) : CHENG W. L., ZHAO R., LIU C., et al.

Type of article: Article

Summary

To investigate the effects of additives on the ammonia bubble absorption, surface tensions of aqueous ammonia with additives were measured by a drop weight method, and performance of absorption of ammonia vapour from an orifice into water were recorded by a video camera and analysed. In the case with additives, the surface tension decreased significantly. For a given additive concentration, the surface tension of aqueous ammonia increased with the increase of the ammonia when the concentration was less than 10%. However, the surface tension decreased when the concentration was more than 10%. During the bubble absorption process, the ammonia vapour flow rate had little effect on the bubble generative frequency. However, the maximum bubble volume, the maximum absorption height, and the Sherwood number for a single bubble increased when the flow rate of ammonia vapour increased. For a single absorption cycling, the additives with a suitable concentration range might enhance the heat and mass transfer.

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Pages: 35-40

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2006-2897
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 27 - n. 109
  • Publication date: 2006/06

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