Claims
- 1. A method for cooling a low-pressure turbine section of a steam turbine, which comprises:
- drawing condensate for use as a coolant from a condenser connected downstream of a steam turbine in a water/steam circuit;
- passing the coolant through a low-pressure turbine section of the steam turbine; and
- cooling down at least a partial flow of the coolant after flowing through the low-pressure turbine section by emitting heat to the water/steam circuit, and then feeding back the at least partial flow to the water/steam circuit.
- 2. The method according to claim 1, which comprises passing the coolant through the low-pressure turbine section during idling operation.
- 3. The method according to claim 1, which comprises passing the coolant through at least one guide blade of the low-pressure turbine section.
- 4. The method according to claim 1, which comprises passing the coolant through passages inside an inner casing of the low-pressure turbine section.
- 5. The method according to claim 1, which comprises directing the coolant in a separate cooling circuit, and feeding back the coolant into the condenser after flowing through the low-pressure turbine section.
- 6. The method according to claim 1, which comprises setting the coolant flow for controlling a final temperature of the at least partial flow downstream of the low-pressure turbine section.
- 7. In a steam turbine plant including a water/steam circuit, a steam turbine connected in the water/steam circuit and having a low-pressure turbine section, and a condenser connected downstream of the steam turbine and having an outflow side, a device for cooling the low-pressure turbine section, comprising:
- a condensate coolant line connected to the outflow side of the condenser, connected to the low-pressure turbine section, and leading into the water/steam circuit; and
- a heat exchanger having a primary side connected in said condensate coolant line downstream of the low-pressure turbine section in condensate flow direction and a secondary side connected in the water/steam circuit for transferring heat contained in the condensate.
- 8. The device according to claim 7, wherein the condenser has a hot well connected to said coolant line.
- 9. The device according to claim 7, including a condensate pump connected in the water/steam circuit and having a pressure side connected to said coolant line.
- 10. The device according to claim 7, including a circulating pump connected in said coolant line.
- 11. The device according to claim 7, including a device for controlling a final temperature of the coolant heated during the cooling.
Priority Claims (1)
Number |
Date |
Country |
Kind |
195 32 199 |
Aug 1995 |
JPX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of International Application Ser. No. PCT/DE96/01506, filed Aug. 12, 1996, which designated the United States.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4891937 |
Noguchi et al. |
Jan 1990 |
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EPX |
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Non-Patent Literature Citations (2)
Entry |
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Continuations (1)
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Number |
Date |
Country |
Parent |
PCTDE9601506 |
Aug 1996 |
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