A study of real-gas effect on SCO<sub>2</sub> compressor performance using similitude method

The drastic property changes of supercritical CO<sub>2</sub> (SCO<sub>2</sub>) make the performance SCO<sub>2</sub> compressors different from that conventional compressors. This study deals with real-gas effect on compressor by theoretical analysis and numerical validation. A set similitude parameters are firstly deduced dimensional analysis. Then keeping these unchanged, variation a is analyzed when inlet flow condition in certain temperature pressure range. Results show proposed method could accurately reflect trend under inflow conditions. enables to obtain higher ratio lower rise. It recommended should be as close possible critical about 150 kPa than corresponding pseudo-critical at same temperature.