초임계 CO2 발전용 Recuperator 열적 성능 시험 및 해석

In this study, numerical analysis and experimental results of Recuperator PCHE constituting the s-CO2 power cycle were discussed. The heat transfer correlations required for the thermal numerical model were obtained using Gnielinski, and it was confirmed that the heat transfer rate is predicted well at ±10% even though numerical analysis is performed through several assumptions. Also, the comparison of heat transfer rate in the Rankine / Brayton cycle was analyzed. In the Brayton condition, it was confirmed that the overall heat transfer coefficient was higher due to the superior thermophysical properties of the supercritical fluid.