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Surprising effects of combined vapour and liquid mass transfer resistances when condensing a mixture outside tube banks.

Author(s) : KARLSSON T., VAMLING L.

Type of article: Article

Summary

Detailed calculations are carried out for condensation of a binary zeotropic mixture outside a tube bank to investigate the combined effects of mass transfer resistances in the liquid and vapour phases. The question is how a change in mass transfer resistance in the vapour phase can influence the heat flux. The surprising result was that a decrease in resistance in the vapour phase by reducing the tube pitch, and thus increasing the vapour velocity, reduces the heat flux between 20 and 50% for the conditions studied. This is due to a combination of mass transfer resistance, depletion of the heavy volatile component, and a reduction in the phase interface temperature.

Details

  • Original title: Surprising effects of combined vapour and liquid mass transfer resistances when condensing a mixture outside tube banks.
  • Record ID : 2005-1732
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 48 - n. 2
  • Publication date: 2005/01

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