System to achieve full combustion turbine load in HRSG limited combined cycle plants
US11892160B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2022 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Oct 18, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22D5/34
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method of suppressing steam production in a HRSG where a volume of feed water is diverted upstream bypassing a portion of the economizer and returning the volume of diverted feed water to a downstream portion of the economizer. A control logic circuit is used to manipulate a suppression control valve regulating the bypassed feed water, thereby reducing the temperature of water in the steam drum. Bypassing feed water flow into a downstream portion of an economizer reduces the steam production rate in the steam drum by increasing the evaporator approach temperature, permitting gas turbines to operate at base load even after an upgrade, by preventing the waste heat boiler from exceeding its rated capacity and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.