Turbomachinery design of an axial turbine for a direct fired sCO2 cycle

• Published in: Energy conversion and management 2022-09, Vol.267, p.115913, Article 115913
• Main Authors: Can Uysal, Selcuk, Weiland, Nathan
• Format: Article
• Language: English
• Subjects: administrative management; algorithms; ant colony optimization; axial turbine design; design optimization for turbines; energy conversion; power plants; sCO2 turbine design; system optimization; temperature; turbomachinery design; turbomachinery design for sCO2
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2022.115913

•Single flow and double flow type turbine designs were made for 950 MW sCO2 turbine.•Ant Colony optimization methods was used to design a 950 MW output sCO2 turbine.•Optimization methods aid in finding the high efficiency designs faster.•Optimization methods aid in reducing the profile and TE losses in turbine designs. This paper presents the details of the design process of a 950 MW rated sCO2 turbine for a direct fired sCO2 power plant. The design is made by using a meanline turbomachinery design code, which is then used in a design optimization process using mixed integer distributed ant colony optimization (MIDACO) algorithm. Turbine blade and disk designs and key turbomachinery design metrics are optimized by using a three-step optimization procedure. A single-flow and a double-flow turbine design were made by using the design optimization procedure. The two turbine designs made in this work represent the first publicly available information on detailed turbine parameters for a large-scale sCO2 turbine, which has unique temperature and pressure design requirements compared to the turbine design conditions used in comparable sCO2 cycle literature.