The dynamic behavior research on feedwater heater with condensation zone

Feedwater heater is an important device in thermodynamic system of power plant, and its operating performance affects the efficiency of the units directly. Focusing on the dynamic behavior of heater, the numerical solutions and experimental researches are presented in this paper. The heater was departed into four control volumes: shell, steam outside the tubes, heat transfer tubes and water inside the tubes. After mass and energy balance equations were given for each part, the dynamic model was established. Finally, the theory results were verified with experimental ones in the steam pressure reduction condition, and the results were almost coincidence.