Method and device for operating a steam power plant, in particular in the part-load range
US6915635B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/303
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
It is proposed that, during the operation of a steam turbine of a steam power plant, the internal pressure and also the internal temperature and, in the region outside it, the external temperature be determined in at least one steam-carrying component. As a result of a change in the operating state, in particular in the event of a load change, then, the abovementioned values vary, so that, under some circumstances, the mechanical stresses which in this case act on the steam-carrying component become unacceptably high. Consequently, a spatial temperature distribution and a reference stress of the steam-carrying component are determined from the abovementioned values and compared with a material limit stress. If the reference stress is greater than the material limit stress, a limit steam pressure desired value is determined, and at least one steam valve is set in such a way that the steam pressure on the steam-carrying component corresponds approximately to this limit steam pressure desired value. By the method according to the invention, an automatic reduction in the throttling is obtained, so that the efficiency of the steam power plant, in particular in the part-load range, is in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.