METHOD OF ENHANCING THE PERFORMANCE OF WATER HEATER IN THE HEAT RECOVERY STEAM GENERATOR (HRSG) SYSTEM

摘要

Accordingly, there is provided a water pre heater device for reducing the exit gas temperature in a heat recovery steam generator (HRSG) system, the HRSG being flowably connected to a gas turbine via a transition duct acting as a passage for exhaust gas from the gas turbine, the HRSG comprising: a super heater formed of a plurality of tubes; an evaporator consisting of a plurality of configured tubes; an economizer adjacently located to the evaporator; and a water 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, the water pre heater device comprising an inlet water entry line from condenser ; a set of finned or bare tubes coated with corrosion resistant material along with a water outlet line, and disposed as a last stage heat transfer section in the HRSG.