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ObjectivesIn order to provide technical reference and design basis for the research and subsequent upgrade of China’s independent heavy-duty gas turbine, a series of upgrade measures of SGT5-4000F gas turbine were analyzed.MethodsThrough the collection, organization and performance analysis of relevant literature and data on the SGT5-4000F gas turbine, a series of upgrade measures taken by Siemens to improve the performance of the gas turbine have been summarized since it was introduced to the market in 1996.ResultsThrough the analysis, it can be concluded that Siemens’ upgrade measures include: increasing compressor mass flow, reducing the cooling air and adopting HCO to improve the power and thermal efficiency. The use of premixed pilot and optimization of the main swirler helps to improve the thermo-acoustic stability and reduce NOx emission. The validated new materials and new casting technologies can be used to improve the durability, life and operational flexibility.ConclusionsThe above technical upgrade measures can be used as technical reference and design basis for future improvement and upgrade of China’s independent heavy-duty gas turbine and its derivative models.

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