| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine cycle having high cycle thermal efficiency. SOLUTION: This steam turbine cycle is provided with a high pressure turbine 1, a reheating turbine 24, a boiler 4, a feedwater heater 6 for heating feed water to the boiler 4 by bleeding steam from the turbines 1, 24, a feed water pump 12 and a steam condenser 10. The steam turbine cycle is a first-stage reheating cycle in which working fluid is water and a Rankine cycle which is a regeneration cycle. The steam temperature at a boiler 4 outlet exceeds 590°C. In this cycle, a temperature rise ratio of feed water temperature rise in a first feedwater heater 7 corresponding to bleeding 22 from exhaust gas of the high pressure turbine 1 (high pressure turbine exhaust gas bleeding) to an average of feed water temperature rise in a second feedwater heater 8 in which feed water has lower pressure compared to the first feedwater heater 7 is set to be≥1.9 and≤3.5. COPYRIGHT: (C)2007,JPO&INPIT
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