ABSTRACT
Heat transfer coefficient in steam is essential for modelling the film boiling of water. The experiment of forced convective heat transfer to superheated steam in vertical round tube of 12mm ID has been performed, covering the range of pressure 1.5 to 60.9 bar, Reynolds number 1800 to 58000, steam temperature 450 to 750K, and surface temperature 590–910K. From the results the change of flow from turbulent region to transition region is evident, which exhibits a dramatic change in the heat transfer trend, and occurs at substantially different Reynolds number for different pressure. The results are compared with six correlations. Reasonable agreement is found with the Heineman and Hadaller correlations for turbulent region, but a significant deviation from the data exists when these correlations are extended to the transition region.
