Method of steam cooling thermally highly loaded units of a gas-turbine group

US6085514A · kind A · utility

Assignee

• ABB Alstom Power (Switzerland) Ltd. · CH

Inventors

• Ali Cemal Benim · Düsseldorf, DE
• Franz Joos · Waldshut-Tiengen, DE

Key dates

• Filing date: Dec 29, 1997
• Grant date: Jul 11, 2000
• Expiry date: Dec 29, 2017

Classification

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

Abstract

In a method of cooling the thermally highly stressed units of a gas turbine, a steam quantity (31, 32) which first of all cools a turbine (3, 5) is used, and then the same steam quantity is directed into a combustion chamber (2, 4). After this combustion chamber has been cooled, this steam quantity is introduced into the burn-out zone of the relevant combustion chamber. In this way, the combustion, designed for low NOx emissions, of the relevant combustion chamber is not affected by this introduction of the steam quantity; furthermore, with this introduced steam quantity, the burn-out zone can be moderated for minimizing the remaining pollutant emissions.