Forced convective boiling in vertical tubes for saturated pure components and binary mixtures


  • Douglas L. Bennett,

    Corresponding author
    1. Chief Engineers Office, Air Products and Chemicals, Inc., Allentown, Pennsylvania 18105
    • Chief Engineers' Office, Air Products and Chemicals Inc., Allentown, Pennsylvania 18015
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  • John C. Chen

    1. Institute of Thermo-Fluid, Engineering and Science, Lehigh University, Bethlehem, Pennsylvania 18015
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Over 1000 sets of data for forced convective boiling of distilled water, ethylene glycol and aqueous mixtures of ethylene glycol are reported. Most of these data were taken in the annular flow regime. These data indicate a previously unrecognized Prandtl number effect on the boiling heat transfer for both pure components and mixtures. A significant reduction in the heat transfer coefficient is observed for mixtures attributable to mass transfer effects. An expression is developed which accounts for both of these effects and correlates the experimental data to within a mean deviation of 14.9%. This correlation reduces to the standard Chen correlation for pure fluids with Prandtl numbers close to unity.