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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

A STUDY ON HEAT AND MASS TRANSFER IN GAS ABSORPTION INTO LIQUID THROUGH A NARROW CHANNEL

Get access (open in a dialog) DOI: 10.1615/IHTC11.2420
pages 57-62

要約

Heat and mass transfer characteristics in the gas absorption into liquid through a narrow channel have been investigated. Two-phase mixture of water vapor and LiBr/Hr0 solution flows in a parallel plate channel with 2mm gap width. The upper wall of the channel is transparent for the visual observation of the flow pattern, and the bottom wall is cooled by water to remove the absorption heat. The absorption rate was measured for various liquid and vapor How rates, and the Sherwood number was correlated with the liquid and vapor Reynolds numbers. Further, a numerical analysis was made on the flow and heat-and-mass transfer assuming a smooth laminar liquid film. The comparison between calculated and experimental results indicates that the enhancement of absorption by the interfacial wave becomes significant with the increase of liquid and vapor Reynolds numbers. In addition, the enhancement of absorption by promoters on the wall was investigated, and it was shown that the increase of pressure drop is an important factor, because the pressure drop causes the increase of equilibrium concentration which reduces the absorption capability.