BK1-19 Transition and Film Boiling Methods for Kettle Reboilers
November 21, 2022This report proposes several correlations based on physical properties to replace the current reduced-pressure correlations Xist® 9.0 uses to determine the maximum heat flux and film boiling heat transfer coefficient for kettle reboilers. It discusses methods to determine the critical temperature differences and documents a new transition boiling method that improves...
BK1-17 Improvements to HTRI 1D Kettle Circulation Model
October 18, 2022This report discusses bundle pressure drop and recirculation flow rate measurements. Comparing HTRI data trends to the bundle flow rate measurements from the literature, we developed an improved circulation model for kettle reboilers. The improved model predicts a higher recirculation, especially at a high vapor generation, which also improves the thermal...
BK1-16 Boiling Temperature Rise due to Recirculation in Kettle Reboiler
June 23, 2022Recirculation in kettle reboilers causes a boiling temperature increase or rise for mixtures because it increases the concentration of less volatile components of the bundle flow. Methods in Xist® 9.0 account for this rise at the top of the bundle. However, the bubble point calculation is based on the feed composition...