Study on Calculation Method of Inlet Steam Flow of External Steam Cooler in Feedwater Heating System

In order to improve the thermal economic performance of coal-fired units in thermal power industry, supercritical units above 600MW generally adopt the method of installing external steam cooler system to improve the utilization of reheat. In view of the difficulties and problems in calculating the three extraction flow of the external steam cooler high pressure heater system by the traditional method, In this paper, a new calculation method of medium flow at the inlet of external steam cooler is proposed based on medium fluid dynamics. This method does not need to install a measuring device, the treatment method is simple and clear, and improves the test efficiency while saving the cost.