| 摘要 |
<p>A steam turbine system comprises a steam turbine 6 driving electric generator 10, a heat recovering steam generator 8, and a gas turbine 2 driving electric generator 4. The steam generator 8 converts feed water into steam using heat exchanger coils 22, 24, 26, 28, 30 and 32 disposed in duct 20 carrying gas turbine exhaust gases. Coil 22 is a boiler feed water heater, 24a low pressure evaporator, 26 an economiser, 28a high pressure evaporator, 30 a reheater, and 32 a superheater. The steam turbine has a high pressure cylinder 34, an intermediate pressure cylinder 36, and a low pressure cylinder 38. Superheater 32 supplies high pressure steam to the cylinder 34, reheater 30 supplied intermediate pressure steam to the cylinder 36 which supplies an output of low pressure steam to the cylinder 38. A fuel gas burner 56 is mounted in the duct between the superheater 32 and the reheater 30 to provide heat augmenting the heat in the exhaust gases. If desired another fuel gas burner 58 may be provided between the reheater 30 and the evaporator 28, and/or another fuel gas burner 60 may be provided between the gas turbine 2 and the superheater 32. <IMAGE></p> |
