The vector analysis indicates that the heat recuperation depends not only on the values of heat transfer coefficient and temperature difference, but also on their coordination for the supercritical fluids. The splitting flow improves the coordination degree between temperature difference and heat transfer coefficient in low temperature recuperator, and increases the inlet temperature of heater and reduces the heat exhaust in the precooler, which leads to
the performance improvement of supercritical CO2 Brayton cycle. The present work is helpful to the system optimization and mechanism analysis of supercritical CO2 Brayton cycle.
Keywords supercritical CO2, heat exchanger, Brayton cycle, coordination optimization, vector analysis.