Influence of compressor inlet correction on simulation of supercritical carbon dioxide Brayton cycle

Supercritical carbon dioxide (S-CO2) Brayton cycle technology is one of the alternative power generation technologies for Generation IV reactors. At present, many scholars have carried out simulation studies on S-CO2 Brayton cycle. However, few studies have focused on the impact of compressor inlet correction. In this study, a transient model of S-CO2 recompression Brayton cycle is established with Modelica language to examine the influence of two different correction methods on the simulation results of the compressor model. And the impact of the compressor speed variation on the S-CO2 Brayton cycle system is also studied. The results indicate that the compressor inlet correction will bring significant deviations compared with the uncorrected model, and the results obtained by the correction of the flow coefficient and the correction of the critical velocity are close to each other. The results show that inlet correction should be considered in both steady state and transient simulation of S-CO2 recompression Brayton cycle.