Development of the gas turbine maintenance management program of main hot gas parts

摘要

The thermal efficiency of gas turbine combined cycle power generation plants will increase significantly in accordance with turbine inlet temperature. These plants will become popular as main thermal power station among electric power companies in Japan. Thus, gas turbine hot gas parts are used under extreme conditions which will strongly affect their lifetimes as well as maintenance costs to be repaired and replaced parts. To reduce the latter is of major importance to enhance cost effectiveness of the plant. This report describes a gas turbine maintenance management program of main hot gas parts (combustion chamber, transition piece, turbine 1{sup}(st) stage nozzle and 1{sup}(st) stage bucket) for management persons of the gas turbine combined cycle power stations in order to obtain an optimal gas turbine maintenance schedule considering rotation, repairing and exchange of those parts.