The structure of a moisture separator reheater is very complex, and the cycle steam is heated during the film condensation of heating steam inside the tube bundle.
Previous works proposed a thermal calculation model and a calculation algorithm of a reheater tube bundle and linearized the quality variation of the heating steam and two-phase flow, but did not consider the subcooling of a condensate film.
Kim Myong Chol, a researcher at the Faculty of Thermal Engineering, has proposed an improved thermal calculation algorithm considering the nonlinearity of the steam quality inside the tube bundle and carried out a quantitative evaluation of the factors affecting heat transfer to provide a theoretical basis for determining the optimum design parameters of a moisture separator reheater.
He found out that measures must be taken to prevent U-tube bundles from sagging down in the design and manufacture of reheater bundles.
For more information, please refer to his paper “Analysis of Heat Transfer Characteristics of a Moisture Separator Reheater Considering the Variation of Steam Quality Inside the Tube” in “Proceedings of KUTIC-2025”.