Malfunction Diagnosis of the GTCC System under All Operating Conditions Based on Exergy Analysis  

作　　者：Xinwei Wang Ming Li Hankun Bing Dongxing Zhang Yuanshu Zhang 

机构地区：[1]Steam Turbine and Gas Turbine Research Center,Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou,310030,China [2]College of Control Science and Engineering,Zhejiang University,Hangzhou,310058,China

出　　处：《Energy Engineering》2024年第12期3875-3898,共24页能源工程（英文）

基　　金：supported by the China Postdoctoral Science Foundation(Grant number:370140).

摘　　要：After long-term operation,the performance of components in the GTCC system deteriorates and requires timely maintenance.Due to the inability to directly measure the degree of component malfunction,it is necessary to use advanced exergy analysis diagnosis methods to characterize the components’health condition(degree of malfunction)through operation data of the GTCC system.The dissipative temperature is used to describe the degree of malfunction of different components in the GTCC system,and an advanced exergy analysis diagnostic method is used to establish a database of overall operating condition component malfunctions in theGTCC system.Ebsilon software is used to simulate the critical parameters of the malfunctions of the GTCC system components and to obtain the changes in the dissipative temperature of different components.Meanwhile,the fuel consumption and economic changes of the GTCC system on a characteristic power supply day under health and malfunction conditions are analyzed.Finally,the effects of maintenance costs,electricity,and gas prices on maintenance expenses and profits are analyzed.The results show that the GTCC system maintenance profit is 6.07$/MWh,while the GTCC system maintenance expense is 5.83$/MWh.Compared with the planned maintenancemode,the malfunction maintenance mode saves 0.24$/MWh.Simultaneously,the maintenance coefficient of GTCC should be adjusted under different malfunctions to obtain a more accurate maintenance period.

关 键 词：Gas turbine combined cycle malfunction diagnosis exergy analysis maintenance profits 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]