Re-fired gas turbine engine
US6817187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/213
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a reheat gas turbine engine for power generation, fuel is burnt with compressed air from a compressor in a first or primary combustor, the combustion products are passed through a high pressure turbine, the exhaust of the high pressure turbine is then burnt together with further fuel in a reheat combustor to consume the excess air, and the exhaust of the second combustor is passed through a lower pressure turbine. Excess air is supplied to the first combustor, thereby enabling so-called “lean burn” combustion for production of low levels of pollutants in the exhaust of the engine. Some turbine components of the turbines, e.g., blades or vanes, are cooled by cooling air supplies tapped off from the compressor. The operating cycle of the gas turbine engine is modified by returning at least some of the spent cooling air from the low pressure turbine to the reheat combustor, where it is burnt with additional fuel to produce a greater volume of exhaust gases, thereby increasing the torque on a shaft and boosting the power output of the generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.