Method of operating a gas-turbine group combined with a waste-heat steam generator and a steam consumer
US5799481A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/15
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of operating a gas-turbine group, combined with a downstream waste-heat steam generator and a steam consumer, in particular a steam turbine, for heat/power cogeneration. The object of the invention is to provide a method which utilizes the utilizable heat energy in the waste-heat steam generator of such a combined-cycle plant at a lower cost and reduces the output fluctuations when demand varies at the external heat consumer. According to the invention, this is achieved in that first of all a quantity of feedwater increased by the maximum heating-water quantity required is directed into the waste-heat steam generator (2). After the feedwater is heated, the additional quantity is diverted as heating water from the water/steam cycle. The diverted heating water is then supplied to the external consumer (30) and the residual heat is used to heat the feedwater tank (3). If there is low demand or no demand for heating water at the external consumer (30), the released quantity of additional feedwater is used to generate steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.