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Distilled Water-Based AlN + ZnO Binary Hybrid Nanofluid Utilization in a Heat Pipe and Investigation of Its Effects on Performance
International Journal of Thermophysics ( IF 2.2 ) Pub Date : 2021-01-21 , DOI: 10.1007/s10765-021-02792-2
Erdem Çiftçi

The preparation and utilization of hybrid nanofluids in thermal systems have become popular nowadays owing to their improved thermophysical properties. Although a nanofluid suspension increases the performance of the thermal system, hybrid nanofluids improve the heat transfer performance more by removing the disadvantages of each component. The aqueous hybrid nanofluids consisting of AlN and ZnO nanoparticles were prepared under various mixing rates and tested in a wickless, thermosiphon-type heat pipe under various circumstances. The effects of both unary and hybrid utilization of nanoparticles in the nanofluid preparation process were taken into consideration. The hybrid nanofluids were prepared in the mixing ratios of 25:75, 50:50, and 75:25 for AlN and ZnO nanoparticles, respectively. The experiments were run by applying 3 different heating powers to the evaporator section, and three different cooling tap water mass flow rates to the condenser section. Temperature distributions on all heat pipe sections were monitored, efficiency and thermal resistance values for each unary and hybrid nanofluids were specified. The results showed that hybrid utilization of nanoparticles enhanced heat pipe characteristics more compared to its unary counterparts. The maximum decrement of 40.79 % was obtained in thermal resistance of the heat pipe under 150 W, 6 g·s−1 conditions.



中文翻译:

蒸馏水基AlN + ZnO二元杂化纳米流体在热管中的利用及其对性能的影响

由于其改善的热物理性质,如今在热系统中制备和利用杂化纳米流体已变得很流行。尽管纳米流体悬浮液提高了热系统的性能,但杂化纳米流体通过消除每种组分的缺点,进一步提高了传热性能。由AlN和ZnO纳米颗粒组成的水性杂化纳米流体是在各种混合速率下制备的,并在各种情况下在无芯,热虹吸型热管中进行了测试。考虑了纳米流体制备过程中纳米颗粒一元和杂化利用的影响。对于AlN和ZnO纳米粒子,分别以25:75、50:50和75:25的混合比制备了杂化纳米流体。通过对蒸发器部分施加3种不同的加热功率,对冷凝器部分施加3种不同的冷却自来水质量流量来进行实验。监测所有热管截面上的温度分布,指定每种一元和混合纳米流体的效率和热阻值。结果表明,与一元对应物相比,纳米粒子的杂化利用增强了热管特性。在150 W,6 g·s下热管的热阻最大降低40.79%结果表明,与一元对应物相比,纳米粒子的杂化利用增强了热管特性。在150 W,6 g·s下热管的热阻最大降低40.79%结果表明,与一元对应物相比,纳米粒子的杂化利用增强了热管特性。在150 W,6 g·s下热管的热阻最大降低40.79%-1条件。

更新日期:2021-01-21
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