METHOD AND DEVICE FOR EFFECTIVE USE OF STEAM FOR STEAM INJECTION-TYPE GAS TURBINE COGENERATION

摘要

PROBLEM TO BE SOLVED: To effectively use excess steam, in a thermoelectric ratio variable-type cogeneration system in a specified electric industry which is under obligation to supply all amount of electric power load of a region. ;SOLUTION: In steam injection-type gas turbine cogeneration, steam recovered by an exhaust heat boiler 22 of a plurality of steam injection-type gas turbines 10 arranged in parallel is partially injected to a combustor 18 to increase the power generation amount, and remaining steam is depressurized for heat utilization. A back pressure steam turbine 52 is provided on a depressurizing line for steam, and steam to be heat-utilized is introduced into the back pressure steam turbine 52, to generate electric power and recover power.;COPYRIGHT: (C)2000,JPO