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Performance evaluation and optimization of semi-dimpled slit fin

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Abstract

In this paper, the semi-dimpled slit fin is proposed and the characteristics of heat transfer and fluid flow are analyzed based on the orthogonal experiment design method. A serial studies on the effects of fin pitch, arrangement of semi-dimple, dimple radius on heat transfer and flow characteristics of semi-dimpled slit fin are investigated. The computational results show fin pitch (Fp) has significantly effected on the performance of heat transfer and fluid flow, the influence of arrangement of semi-dimple, the dimple radius (R) and the opening direction of semi-dimples dwindle. At the same time, compared to the general semi-dimpled slit fin, the heat transfer coefficient and JF factors of the optimized fin increase by 10.7–25.1 and 2.6–7.7 %, respectively. When Re ≤ 1,521, the overall performance of slit fin is better than that of optimized fin; while Re > 1,521, the overall performance of optimized fin is better than that of slit fin. Finally, the performance evaluation plot of enhanced heat transfer of heat exchanger is applied to analyze the optimized fin, it can be seen that optimization fin have better heat transfer performance under the same power consumption.

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Acknowledgments

The present work is supported by the Project of National Natural Science Foundation of China (No. 21076200), Henan province and college cooperation projects (No. 092106000013), supported by Foundation for University Key Teacher by the Henan province (2012GGJS-115), scientific and technological project of Henan province (102102210138) and Innovation Scientists and Technicians Troop Construction Projects of Zhengzhou City (131PLJRC640).

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Authors and Affiliations

  1. School of Electromechanical Science and Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450004, Henan, China

    XueHong Wu, WenHui Zhang, YanLi Lu, QiuPing Gou & ZhiMing Luo

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  1. XueHong Wu
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  2. WenHui Zhang
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  3. YanLi Lu
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  5. ZhiMing Luo
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Correspondence to XueHong Wu.

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Wu, X., Zhang, W., Lu, Y. et al. Performance evaluation and optimization of semi-dimpled slit fin. Heat Mass Transfer 50, 1251–1259 (2014). https://doi.org/10.1007/s00231-014-1338-9

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