Thermal and hydraulic performance of half-cone minichannel design for supercritical CO2 PCHE

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-03-13 DOI:10.1016/j.supflu.2025.106594

Haisong Zhang , Bo Wang , Xiang Xu , Lin Chen , Tianshu Song , Bingguo Zhu

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引用次数: 0

Abstract

The Printed Circuit Heat Exchanger (PCHE) is one of the promising application of heat exchangers in supercritical CO₂ (scCO₂) power cycles due to its high compactness and structural rigidity. In this study, an innovative minichannel design with half-cone fin is proposed to increase performance of PCHE and its thermal and hydraulic characteristics are investigated numerically. With the increase of diverging-converging ratio and rib height, and the decrease of pitch, heat transfer can be improved. The flow direction of fluid changes constantly due to the variable cross-section, resulting in large changes in velocity and pressure gradients and increased pressure drop. However, comparing with the traditional straight channel and zigzag channel, it can transfer more heat at the same pump power, especially at relatively low Reynolds number flows. In summary, the half-cone fin can not only benefit increasing the compactness of PCHE, but also has good reliability in advanced scCO₂ power cycles.

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.