Study on Thermal and Hydraulic Performance of Supercritical CO2 in Coupled Channel PCHE With Variable Cross-section
In this paper,using S-CO2 as the heat transfer fluid on the cold and hot sides of the Printed Circuit Heat Exchanger(PCHE),the thermal and hydraulic performance of the circular constant cross section coupling channel,the circular diverging channel and the circular converging channel were compared by numerical simulation method.The results show that,under the same heat transfer area,compared with the traditional constant cross section channel PCHE,the PEC of S-CO2 in the converging channel on both hot and cold sides is greater than 1,the maximum reaches 2.16,and the minimum is 1.38,which shows the best comprehensive performance.However,the PEC of S-CO2 in both sides of the diverging channel is less than 1,and the overall performance is poor.Decreasing the cold side operating pressure is beneficial to improve the comprehensive performance of the converging channel.The results provide new ideas and theoretical guidance for the design of PCHE.
supercritical carbon dioxidePCHEvariable cross section channelthermal and hy-draulic performance
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