Mass transport effect on the heat transfer coefficient during boiling of multicomponent mixture |
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Authors: | Roman Krupiczka Adam Rotkegel Zenon Ziobrowski |
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Institution: | (1) Institute of Chemical Engineering, Polish Academy of Sciences, ul. Bałtycka 5, 44-100 Gliwice, Poland |
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Abstract: | In this work a simplified calculation method taking into account the effect of mass transport on the heat transfer coefficient
(HTC) during boiling of multicomponent mixture has been elaborated. The calculation results were compared with own experimental
data for ternary system methanol–isopropanol–water and Grigoriev data 1] (acetone–methanol–water). The experiments were performed in different hydrodynamic conditions such as: pool boiling and
liquid evaporation at the free surface of the falling film. The experimental data covered wide range of heat fluxes from 6
to 30 kW/m2 in the case of liquid evaporation from the falling film and from 30 to 240 kW/m2 for pool boiling. The analysis of the results indicates that the mass transfer resistance in the liquid phase caused a significant
reduction of experimental value HTC in comparison to so-called ideal HTC. |
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