Fig. 1 shows the layout of an ultrasupercritical coalfired power plant (the base plant) with condensing steam turbine and singlereheater. Design nameplate capacity of the plant is 1000 MW block system is completed with three hightemperature heaters (marked as HTR7, HTR6 and HTR5 in Fig. 1), four lowtemperature heaters (marked as HTR1, HTR2, HTR3 and HTR4 in Fig. 1) and one deaerator.
