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Title: Modeling of Rectangular Microchannel Heat Sink with Non-Uniform Channels and Multi-Objective Optimization
题目：非均匀矩形微通道热沉建模及多目标优化
Authors: SHANG Xueshuo, WANG Yixin, LI Qingwen, WANG Rui, CUI Zheng, SHAO Wei
作者：商学硕，王怡欣，栗庆文，王瑞，崔峥，邵卫
单位：高等技术研究院,热科学与工程研究中心,山东高等技术研究院
Journal of Thermal Science, 2024, 33(5): 1701-1711.
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摘要
Abstract:Rectangular microchannel heat sinks (MCHS) are widely used to cool high-heat-flux electronic devices. However, previous studies focused mainly on MCHS with uniform channels (UCs). This study considers a microchannel heat sink with non-uniform channels (NUCs). A mathematical model is developed based on energy equations and the Darcy flow principle. Explicit expressions for total thermal resistance and coolant pressure drop are derived using the thermoelectric analogy. Experiments and numerical simulations are performed to verify the mathematical model. As non-uniformity increases, total coolant pressure drop decreases but at the cost of higher thermal resistance. The overall performance of NUCs is better than that of UCs because of their lower ratio of pumping power to cooling power. Heat transfer performance of NUCs changes little for more than 120 channels and depends mainly on channel arrangement. A multi-objective optimization is conducted to minimize the thermal resistance and pumping power of an NUC. An optimal NUC saves 64% pumping power compared with a conventional UC for the total thermal resistance of 0.1°C/W, indicating that the use of non-uniform channels could be very helpful to reduce the flow resistance of MCHS.
摘要：微通道热沉(MCHS)广泛应用于高热流密度电子设备冷却，以往的研究主要集中在矩形通道均匀分布（UCs）的热沉。本研究建立了矩形通道非均匀分布（NUCs）的热沉模型，基于能量方程和达西定律构建了描述热沉传热和流动性能的数学模型，基于热-电比拟方法推导了热阻数学表达式，并通过实验和数值模拟验证了模型的可靠性。仿真结果表明，随着通道非均匀程度的增加，总压降减小，但总热阻增大。相比于Ucs，NUCs泵功与冷却功率的比值更低，因此整体性能更佳。当通道数超过120，NUCs的传热性能主要取决于通道的排列方式。以NUCs的热阻和泵功最小为目标构建多目标优化模型，结合遗传算法求解获得最优参数，结果表明，在总热阻为0.1℃/W时，最优NUCs与传统UCs相比最多可节省64%的泵功。
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引用格式
SHANG Xueshuo, WANG Yixin, LI Qingwen, WANG Rui, CUI Zheng, SHAO Wei, Modeling of Rectangular Microchannel Heat Sink with Non-Uniform Channels and Multi-Objective Optimization, Journal of Thermal Science, 2024, 33(5): 1701-1711.
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