Thermal Performance of An Innovative Rotating Fan-Sink Radiator

創新型旋轉式熱槽散熱器的熱性能

Shueei-Muh Lin(林水木) ； Didi Widya Utama(周新光) ； Chihng-Tsung Liauh(廖慶聰) ； Agustinus Purna Irawan

《中國機械工程學刊》 44卷1期 (2023/02) Pp. 11-21

摘要

The cooling device is traditionally composed of two components: (1) the conductive sink and (2) the axial fan. This research proposes a novel design of a rotating fan-sink radiator, with the rotating fan made of conductive material serving two functions: heat conduction and drawing in cold air. The numerical and experimental results for the rotating fan-sink are very consistent; two indexes of its performance are presented: (1) the thermal resistance as low as possible and (2) the ratio of thermal admittance to the required power consumption driving the rotating fan as high as possible. Cooling performance is improved by increasing the relative velocity of the conductive fan and the cooling fluid. The effects of the number of blades, the hub diameter, and the power consumption on heat transfer performance are investigated. This study discovered that the fan-sink's thermal resistance is considerably less than the literature under some parameters. Moreover, the thermal admittance-power consumption ratio is significantly greater than the other. Finally, some correlation formulas for the Nusselt number were established with less than 6% error compared to the experimental data.

關鍵字

rotating fan-sink ； thermal admittance - power consumption ； Nusselt number correlation formula

並列摘要

傳統上冷卻裝置由兩個元件組成：（1）熱槽和（2）軸流風扇。本研究提出了一種新型的旋轉風扇熱槽散熱器設計，由導熱材料製成的旋轉風扇具有兩個功能：熱能的傳導和推動冷空氣中的流動。旋轉風扇熱槽散熱器的電腦模擬數值和實驗結果非常一致。提出了比對本裝置性能的兩個設計指標：（1）盡可能降低熱阻值和（2）盡可能高的速度驅動旋轉風扇下熱導納與所需功耗的比率。通過增加導熱風扇和冷卻空氣的相對速度，可以提高冷卻性能。研究了葉片數量、輪毂直徑和功耗對傳熱性能的影響。本研究發現，在某些參數下，旋轉風扇熱槽散熱器的熱阻遠低於現有文獻。此外，熱導納-功耗比明顯大於其他冷卻裝置。最後，建立了一些Nusselt數的相關公式，與實驗數據相比誤差小於6%。