Abstract
An experimental study on the boiling heat transfer to water flowing in a tube at pressures of 0.3, 0.5, 1 and 2 MPa was conducted. Based on the data in the subcooled boiling region, a heat transfer model, in which the heat flux was postulated to consist of forced convection and nucleate boiling contributions, was developed. The forced convection heat flux was evaluated by the single-phase convective heat transfer correlation by taking into account the effect of increase in liquid velocity due to net vapor generation. The nucleate boiling heat flux is determined from an empirical correlation that takes into consideration promotive and suppressive effects on the incipience of boiling. The present model was compared with the experimental data and various known correlations and satisfactory results were obtained.
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