Investigation on steady aerodynamic performance of a S-CO2 compressor with different diffusers in solar power system

9th Edition of the International SOLARIS Conference

Du, Qiuwan^1 ; Zhang, Di^1 ; Xie, Yonghui^2

MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'An Jiaotong University, Xi'an, China^1

Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, School of Energy and Power Engineering, Xi'An Jiaotong University, Xi'an, China^2

关键词: Aero-dynamic performance;    Diffuser blades;    Off design condition;    Performance analysis;    Reference values;    solar;    Supercritical carbon dioxides;    Thermal designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/556/1/012027/pdf
DOI  :  10.1088/1757-899X/556/1/012027

来源: IOP

【 摘 要 】

Research on solar power system has become a hot spot recently. The supercritical carbon dioxide (S-CO2) power cycle has been widely used in the solar power system with excellent advantages of high efficiency and small device size. Centrifugal compressor plays an important role in the S-CO2 power cycle. The design of a centrifugal compressor is completed according to the requirements of thermal design in this paper. The differences of three kinds of diffusers on the steady aerodynamic performance are further investigated based on the designed model. Finally, the influence of diffuser blade number on the performance is discussed. The results show that the centrifugal compressor with wedge-shaped diffuser holds the best performance under the design and off-design conditions. The diffuser blade number has significant influence on the aerodynamic performance. The current design and performance analysis of centrifugal compressor could provide important reference value for further application of centrifugal compressor in solar power system.