A HEAT RECOVERY STEAM GENERATOR (HRSG) SYSTEM FOR SMOOTH CHANGE OVER FROM GAS TURBINE(GT)MODE TO FRESH AIR FIRING (FD) MODE AND REDUCED BACK PRESSURE TO THE GAS TURBINE

摘要

(1) a super heater formed of a plurality of tubes, (2) an evaporator consisting of a plurality of configured tubes; (3) an economizer adjacently located to the evaporator; and (4) a condensate pre heater/makeup water heater adjacently located to the economizer. The exhaust gases from the economizer/condensate pre heater/makeup water heater emitting via a stack through a device called induced draft fan. The device comprising an uptake duct, a set of blades along with shaft and an outlet duct disposed in between the last heat transfer section of HRSG and stack.