Single loop attemperation control
US8733104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2009 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22G5/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat recovery steam generation system is provided. The heat recovery steam generation system includes at least one superheater in a steam path for receiving a steam flow and configured to produce a superheated steam flow. The system also includes an inter-stage attemperator for injecting an attemperation fluid into the steam path. The system further includes a control valve coupled to the inter-stage attemperator. The control valve is configured to control flow of attemperation fluid to the inter stage attemperator. The system also includes a controller coupled to the control valve and the inter-stage attemperator. The controller further includes a feedforward controller and a trimming feedback controller. The feedforward controller is configured to determine a desired amount of flow of the attemperation fluid and the trimming feedback controller is configured to compensate for inaccuracies in the determined amount of flow of the attemperation fluid to determine a net desired amount of flow of attemperation fluid through the control valve into an inlet of the inter-stage attemperator based upon an outlet temperature of steam from the superheater. The controller also determines a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.