Optimization and Thermal Performance Assessment of Elliptical Pin-Fin Heat Sinks

Dr Husam Rajab, Professor Apostolos Pesyridis, Dr Miltiadis Kourmpetis, Dr Saeed Al-Noman
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Abstract

Heat transfer and fluid flow analyses are employed in this study to optimize the geometry of elliptical pin-fin heat sinks. An entropy minimization technique is employed to optimize the the overall thermal performance of elliptical pin-fin heat sinks (EPFHS). The performance of EPFHS is identified by its thermal resistance and pressure drop. because they substantially affect the the thermal resistance during forced convection cooling of electronics. The design of EPFHS of different configurations are studied and the thermal and hydraulic behaviors are compared. Entropy generation rate is obtained using mass, energy and entropy balance over a control volume. The average heat transfer coefficient of EPFHS is developed using an energy balance equation over the control volume. This heat transfer coefficient is a function of the heat sink material, fluid properties, fin geometry, pin-fin configuration. The selected materials are alumium, and copper.
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椭圆针翅式散热器的优化及热性能评价
本文采用传热和流体流动分析方法对椭圆鳍形散热器的几何结构进行了优化。采用熵最小化技术对椭圆管肋式散热器的整体散热性能进行了优化。EPFHS的性能是通过其热阻和压降来确定的。因为它们在很大程度上影响了电子器件强制对流冷却过程中的热阻。研究了不同结构的EPFHS的设计,并对其热性能和水力性能进行了比较。熵生成率是通过控制体积上的质量、能量和熵平衡来获得的。利用控制体积上的能量平衡方程计算了EPFHS的平均换热系数。传热系数是散热器材料、流体特性、翅片几何形状、鳍片结构的函数。选用的材料是铝和铜。
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