SYSTEMS AND METHODS FOR ADJUSTING FLOOR PRESSURE LEVELS TO IMPROVE COMBINED CYCLE PLANT STARTUP

摘要

PROBLEM TO BE SOLVED: To provide a method and system for adjusting floor pressure levels to improve combined cycle plant startup.SOLUTION: The method includes the steps of: receiving a plurality of measured plant operating values associated with an HRSG steam circuit; identifying a plurality of candidate pressure levels for use in pressurizing the HRSG steam circuit; determining a calculated steam velocity level for each of the plurality of candidate pressure levels; identifying a steam velocity limit for a steam piping section of the HRSG circuit; selecting a lowest pressure level of the plurality of candidate pressure levels, where the lowest pressure level is associated with a determined calculated steam velocity level that does not exceed the identified velocity limit; and pressurizing the HRSG steam circuit to the selected lowest pressure level.SELECTED DRAWING: Figure 5