Performance Study and Optimization Design of Manifold Microchannel Heat Sink With Rectangular Ribs

doi:10.3969/j.issn.1008-0198.2025.03.001

Abstract

Abstract: To enhance the comprehensive performance of the manifold microchannel heat sink (MMCHS), a new manifold microchannel heat sink with rectangular ribs (MMCHS-RR) is proposed. Firstly, the three-dimensional numerical simulations are employed to investigate the effects of the arrangement of rectangular ribs, microchannel width, microchannel height, and the ratio of rectangular rib width to microchannel width on the thermal-hydraulic performance. Then the artificial neural network and a multi-objective genetic algorithm are used to optimize the structural parameters. Finally, the TOPSIS decision-making algorithm is applied to select the parameter combination with the best comprehensive performance from the Pareto front. After optimization, compared with the initial heat sink, the maximum temperature on the heated surface is reduced by 6.4 K, the average heat transfer coefficient is increased by 46.3%, and the total pressure drop is reduced by 1.85 kPa at an inlet flow rate of 6 m/s. The research results indicate that the heat sink with rectangular ribs arranged to bypass the jet holes of the inlet manifold and the outflow holes of the outlet manifold exhibits superior comprehensive performance.

Key words: electronic equipment cooling, manifold microchannel, rectangular rib, parameter analysis, multi-objective optimization

CLC Number:

TM172.4

LiU Yiwen, CUi Pan, LiU Wei, LiU Zhichun, CUi Haichuan. Performance Study and Optimization Design of Manifold Microchannel Heat Sink With Rectangular Ribs[J]. Hunan Electric Power, 2025, 45(3): 1-8.

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