1. Introduction - Firenze University Press

Fig. 3. 600MW supercritical coal-fired power plant without CO2 capture process
The selected steam turbine process flow diagram is shown in Fig. 4. The turbine consists of a HP,
IP and LP sections all connected to the generator with a common shaft. Steam from the exhaust of
the HP turbine is returned to the boiler for reheating and then sent to the double flow IP turbine.
Exhaust steam form the IP turbines then flows into the double cylinders/four flows LP turbine
system.
Fig. 4. Steam/water cycle of the 600MW supercritical power unit
And the overall performances of the unit is summarized in Table 1. Besides, the unit is designed to
generate about 1677.5t/h of steam at nominal conditions of 24.2MPa and 566 o C with reheat steam
heated to 566 o C, and the exhaust steam pressure of the steam turbine is 5.88kPa. These represent
the typical parameters of China’s existing power generation unit.
Fuel Parameters
Table 1. Overall performance of Base Case
Coal Heat Input (HHV) MJ/kg, ar 23.92
Coal Heat Input (LHV) MJ/kg, ar 22.76
Steam/Water Cycle Parameters
Existing Steam Turbine Generator Output MW 604.3
Total Auxiliary Power MW 30.22
Net Output MW 573.8
Overall Plant Performance Parameters
Net Efficiency % 40.28
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