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Enabling Taguchi method with grey relational analysis to optimize the parameters of TiO2/ZnO heat transfer nanofluid for heat pipe application
Nano Express ( IF 2.7 ) Pub Date : 2021-03-10 , DOI: 10.1088/2632-959x/abea48
Jacob Rubasingh B 1 , P Selvakumar 2
Affiliation  

Our previous work demonstrated that the TiO2/ZnO (1:1) nanocomposite suspended in ethylene glycol with CTAB (0.5 ml) as surfactant exhibits better heat transfer property than TiO2 and ZnO nanofluid. As an extension, the influence of parameters such as wt.% of ZnO Nps in TiO2/ZnO nanocomposite (0 wt.%, 25 wt.%, 50 wt.%, and 100 wt.%), the quantity of CTAB (250 μl, 500 μl, 750 μl, and 1000 μl) and vol.% of TiO2/ZnO nanocomposite (1 vol.%, 2 vol.%, 4 vol.%, and 8 vol.%) are analyzed through Taguchi design constructed with L16 orthogonal array is emphasized in the present work. As per the Taguchi design, the responses such as viscosity, thermal conductivity, and normalized height % for the set of input parameters are evaluated. Besides, the multiple responses are graded employing Grey relational analysis and the optimum set of parameters to achieve the preparation of the best nanofluid is identified as 25 wt.% ZnO, 1 vol.% nanocomposite and 500 μl CTAB which display viscosity of 0.043 Pa.s, thermal conductivity of 0.35 Wm−1 K−1, and normalized height % as 1%. Further, the optimal TiO2/ZnO nanofluid is used as working fluid in heat pipe and compared its results with ethylene glycol. From the calculated thermal resistance and heat transfer coefficient values, the TiO2/ZnO nanofluid outperforms the base fluid in a significant manner.



中文翻译:

基于灰色关联分析的田口法优化热管应用中TiO 2 /ZnO传热纳米流体的参数

我们之前的工作表明,悬浮在乙二醇中的 TiO 2 /ZnO (1:1) 纳米复合材料与 CTAB (0.5 ml) 作为表面活性剂相比,具有比 TiO 2和 ZnO 纳米流体更好的传热性能。作为扩展,参数的影响如TiO 2 /ZnO纳米复合材料中ZnO Nps的wt.%(0wt.%、25wt.%、50wt.%和100wt.%)、CTAB的量( 250 μ l、500 μ l、750 μ l 和 1000 μ l) 和 TiO 2 的体积百分比/ZnO 纳米复合材料(1 vol.%、2 vol.%、4 vol.% 和 8 vol.%)通过田口设计进行分析,L16 正交阵列构造在本工作中被强调。根据田口设计,对输入参数集的粘度、热导率和归一化高度 % 等响应进行评估。此外,多个响应进行分级采用灰关联分析和最佳的一组参数,以达到最好的纳米流体的制备中被标识为25重量%的ZnO,1体积%的纳米复合材料和500 μ升CTAB哪个显示0.043帕的粘度.s,0.35 Wm -1 K -1 的热导率,以及归一化的高度%为1%。此外,最佳的 TiO 2/ZnO 纳米流体用作热管中的工作流体,并将其结果与乙二醇进行比较。从计算的热阻和传热系数值来看,TiO 2 /ZnO 纳米流体显着优于基础流体。

更新日期:2021-03-10
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