Method for operating a gas and steam-turbine plant and plant working according to the method
US5992138A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jan 27, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01K23/106
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.