Kurnia Jundika C, Lim Desmond C, Chen Lianjun, Jiang Lishuai, Sasmito Agus P
Department of Mechanical Engineering, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Perak Darul Ridzuan, Malaysia.
State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China.
Entropy (Basel). 2019 Feb 18;21(2):191. doi: 10.3390/e21020191.
Owing to its relatively high heat transfer performance and simple configurations, liquid cooling remains the preferred choice for electronic cooling and other applications. In this cooling approach, channel design plays an important role in dictating the cooling performance of the heat sink. Most cooling channel studies evaluate the performance in view of the first thermodynamics aspect. This study is conducted to investigate flow behaviour and heat transfer performance of an incompressible fluid in a cooling channel with oblique fins with regards to first law and second law of thermodynamics. The effect of oblique fin angle and inlet Reynolds number are investigated. In addition, the performance of the cooling channels for different heat fluxes is evaluated. The results indicate that the oblique fin channel with 20° angle yields the highest figure of merit, especially at higher (250-1000). The entropy generation is found to be lowest for an oblique fin channel with 90° angle, which is about twice than that of a conventional parallel channel. Increasing decreases the entropy generation, while increasing heat flux increases the entropy generation.
由于其相对较高的传热性能和简单的结构，液体冷却仍然是电子冷却和其他应用的首选。在这种冷却方法中，通道设计在决定散热器的冷却性能方面起着重要作用。大多数冷却通道研究从第一热力学方面评估性能。本研究旨在从热力学第一定律和第二定律的角度研究不可压缩流体在带有斜肋片的冷却通道中的流动行为和传热性能。研究了斜肋片角度和入口雷诺数的影响。此外，还评估了不同热通量下冷却通道的性能。结果表明，角度为20°的斜肋片通道具有最高的品质因数，尤其是在较高的（250 - 1000）时。发现角度为90°的斜肋片通道的熵产生最低，约为传统平行通道的两倍。增加会降低熵产生，而增加热通量会增加熵产生。
