Combined gas and steam turbine system

US5365730A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hermann Bruckner · Uttenreuth, DE
• Erich Schmid · Nuremberg, DE

Key dates

• Filing date: Mar 19, 1993
• Grant date: Nov 22, 1994
• Expiry date: Mar 19, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/16
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A combined gas and steam turbine system includes a steam turbine having a water/steam loop and a high-pressure stage in the water/steam loop. The high-pressure stage has a preheater and a high-pressure heater connected downstream of the preheater. A gas turbine has an exhaust gas side. A steam generator is connected downstream of the exhaust gas side of the gas turbine. The steam generator includes a firing system producing flue gases flowing in a given direction, the preheater, the high-pressure heater, an intermediate superheater connected downstream of the high-pressure stage, and a medium-pressure heater connected parallel to the high-pressure stage. The medium-pressure heater is disposed in the steam generator between the high-pressure heater and the preheater, as seen in the given flow direction of the flue gases.