Method for operating a gas and steam-turbine plant and plant wor

Details Method for operating a gas and steam-turbine plant and plant wor Method for operating a gas and steam-turbine plant and plant wor

1998-01-27

1999-11-30

Kim, Ted

Power plants

Combustion products used as motive fluid

60 39182, 122 7B, F02G 300

Patent

active

059921382

ABSTRACT:
A gas and steam-turbine plant includes a waste-heat steam generator downstream of a gas turbine on the exhaust-gas side. The waste-heat steam generator has a high-pressure preheater connected into a water/steam circuit of a steam turbine having a low-pressure part. In order to achieve as high a plant efficiency as possible, a heat exchanger which is disposed outside the waste-heat steam generator has a primary-side inlet connected to an outlet of the high-pressure preheater, a primary-side outlet connected to an inlet of the high-pressure preheater and a secondary side connected into an overflow conduit opening into the low-pressure part of the steam turbine. A method for operating such a plant includes superheating low-pressure steam flowing into the steam turbine by indirect heat exchange with a part stream of preheated feed water extracted from the high-pressure preheater.

REFERENCES:
patent: 3331202 (1967-07-01), Brunner
patent: 5269130 (1993-12-01), Finckh et al.
patent: 5285627 (1994-02-01), Losel et al.
patent: 5365730 (1994-11-01), Bruckner et al.

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