Exergy analysis of the semi-closed gas turbine combined cycle (SCGT/CC)

摘要: Abstract In the present paper, an exergy analysis of SCGT/CC cycle is presented. Exergy destruction has been analysed at component level in order to identify critical plant devices, considering several operating conditions. The power-plant configuration similar that presented previous works, with possibility total or partial water injection combustion chamber peakload Combustion, heat recovery steam generator (HRSG), injection/mixing and system are main sources losses, representing globally more than 80% overall destruction. second-law efficiency ranges between 49% 53%, moving from fully injected not condition. These values close those standard open cycles, which means a good potential for cycle, advantages point view containment emissions capability shaving. Peakload operation (with re-injection) involves additional waste exergy, but attractive as it can be very extended this configuration. Some components, such condensing exchanger, show some sensitivity parameters, however only marginally affects performance.