Research on Heat Transfer Correlation for Passive Containment Cooling System

In this paper, a CFD model in low Mach number regime was used to model the convection heat transfer tests in COPAIN facility, and validated using COPAIN experimental data. Using the CFD model to extend the experimental parameters in convection heat transfer to high temperature difference regime（40~80℃）, compute the Nusselt number for convection heat transfer, and a heat transfer correlation suitable for the PCCS design was derived. The condensation heat and mass transfer model closed by the new correlation was validated using the Wisconsin condensation tests data. Comparing with Dittus-Boelter correlation, the computed results are more close to the tests data.