| 摘要 |
A reheat gas and double reheat steam turbine combined cycle is provided in which the outer shell confining the blading of the power turbine and the exhaust portion of the power turbine are cooled with steam extracted from the steam cycle. The coolant steam is extracted from a high pressure steam turbine, used to cool the turbine outer shell, readmitted for expansion in the steam turbine, the lower pressure steam is extracted to cool the exhaust portion of the power turbine and readmitted to the steam turbine and condensed.
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