Share

IIR document

Heat and mass transfer enhancement by additives in absorptions of H2O-LiBr and NH3-H2O.

Author(s) : CHENG W. L., ZHAO R., SHI M., et al.

Summary

The surface tensions of both aqueous LiBr and aqueous ammonia in the presence of additives were measured. The effects of additives on absorption of vapour into vertical falling aqueous LiBr film, absorption of vapour into aqueous LiBr in a static pool, and absorption of ammonia vapour bubble into NH3-H2O were studied by experimental methods, respectively. The experimental results showed that the heat and mass transfer performance was significantly enhanced with additives (2-EH, n-octanol etc.) in the process of both the aqueous LiBr absorption and the ammonia bubble absorption. The enhancement mechanisms of additives on aqueous LiBr absorption has been concluded in that additives in the liquid phase is absorbed by aqueous LiBr on the liquid side of the liquid-vapour-interface, so is the vapour phase on the vapour side, which generates surface tension gradient, then causes Marangoni convection at the interface, and consequently results in the enhancement of the heat and mass transfer during the absorption process.

Available documents

Format PDF

Pages: ICR07-B1-1507

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Heat and mass transfer enhancement by additives in absorptions of H2O-LiBr and NH3-H2O.
  • Record ID : 2008-0176
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

Links


See other articles from the proceedings (839)
See the conference proceedings

Indexing