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BEHAVIOR OF THE LIQUID FILM IN AN ABSORBER.

Author(s) : HIHARA E., SAITO T.

Summary

ABSORPTION OF A VAPOR INTO A LIQUID FILM FLOWING ALONG A VERTICAL TUBE IS ANALYZED. A VERTICAL ABSORBER WAS CONSTRUCTED TO OBSERVE THE BEHAVIOUR OF THE LIQUID FILM AND TO MEASURE THE COEFFICIENTS OF HEAT AND MASS TRANSFER. AT THE LOW FILM REYNOLDS NUMBER, A BREAK OF THE FALLING FILM WAS FREQUENTLY OBSERVED, WHICH IS CAUSED BY THE INSTABILITY DUE TO THE DEPENDANCE OF THE SURFACE TENSION ON THE ABSORBENT CONCENTRATION. THIS INSTABILITY SCARCELY CONTRIBUTES TO THE ENHANCEMENT OF THE FILM ABSORPTION, BUT RESULTS IN THE REDUCTION OF THE EFFECTIVE HEAT TRANSFER AREA. THE MOMENTUM AND DIFFUSION EQUATION ARE SOLVED IN THE LIQUID FILM TO OBTAIN THE TEMPERATURE AND THE CONCENTRATION DISTRIBUTIONS. THE PERFORMANCE OF THE FILM ABSORPTION CAN BE SUCCESSFULLY PREDICTED. WITH THE AID OF THIS CALCULATION, AN ANALOGY BETWEEN THE HEAT AND THE MASS TRANSFER AT THE INTERFACE IS EXAMINED. DEPENDENCES OF NUSSELT NUMBER AND SHERWOOD NUMBER ON THE FILM REYNOLDS NUMBER ARE QUITE DIFFERENT.

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Pages: 524-527

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Details

  • Original title: BEHAVIOR OF THE LIQUID FILM IN AN ABSORBER.
  • Record ID : 1992-2215
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10
  • Document available for consultation in the library of the IIR headquarters only.

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