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Experimental investigations of heat transfer and pressure drop during the condensation process within plate heat exchangers of the herringbone-type.

Author(s) : WÜRFEL R., OSTROWSKI N.

Type of article: Article

Summary

The application of compact heat exchangers to the realization of the processes with phase change gaseous-liquid is increasingly significant. However, the state of the knowledge is unsatisfactory for modelling heat transfer and pressure drop. Experimental investigations on condensation in the channels of corrugated plates of a plate heat exchanger were carried out with the condensing vapours water and n-heptane. The loads of the vapour phase as well as the kind of plate corrugation were used as experimental parameters. The results, in terms of the heat transfer coefficient and friction pressure drop, refer to the condition of complete condensation. The essential influence of the phase load as well as of the corrugation inclination angle was observed in the investigated range of shear controlled two-phase flow. The intensity of heat transfer increases by a factor of approx. 3-4, compared with the calculation of the Nusselt theory of the laminar film. A discussion of the experimental data was realized on the basis of modelling of the turbulent two-phase channel flow.

Details

  • Original title: Experimental investigations of heat transfer and pressure drop during the condensation process within plate heat exchangers of the herringbone-type.
  • Record ID : 2004-1667
  • Languages: English
  • Source: International Journal of thermal Sciences - vol. 43 - n. 1
  • Publication date: 2004/01

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