Experimental study on heat transfer enhancement of carboxylate multi-wall carbon nanotubes in a 3D pulsating heat pipe with a corrugated evaporator

IF 2.7 3区工程技术 Q2 ENGINEERING, MECHANICAL

Nanoscale and Microscale Thermophysical Engineering Pub Date : 2022-05-17 DOI:10.1080/15567265.2022.2072790

Ali Reza Alizadeh Jajarm, H. Goshayeshi, K. Bashirnezhad

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引用次数: 2

Abstract

ABSTRACT In this research, the thermal performance of a three-dimensional pulsating heat pipe with 11 turns is investigated experimentally. Carboxyl-functionalized multi-walled carbon nanotubes with 0.1 wt% in a water-based fluid are used as the operating fluid. Experiments are performed at 50% and 60% filling ratios, and the effect of grooving the evaporator tubes has also been investigated. Experiments with distilled water were also performed to compare the effect of the nanofluid. Experimental results show that the heat transfer performance of the device depends mainly on the power input and the filling ratio, working fluid, and also, the corrugated evaporator that significantly improves the thermal performance. The use of nanofluids reduces the thermal resistance by about 13% compared to pure water at a filling ratio of 50%, and an input power of 300 watts. At a filling ratio of 60%, and the use of nanofluid, corrugating the evaporator reduces the thermal resistance by 6% in comparison with non-corrugated tubes. In general, and in all cases, with increasing input power, the thermal resistance also decreases.

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波纹蒸发器三维脉动热管中羧酸盐多壁碳纳米管强化传热的实验研究

本文对11匝三维脉动热管的热性能进行了实验研究。羧基功能化的多壁碳纳米管在水基流体中含有0.1 wt%作为操作流体。在填充率为50%和60%的情况下进行了实验，并研究了开槽对蒸发器管的影响。用蒸馏水进行了实验，比较了纳米流体的效果。实验结果表明，该装置的传热性能主要取决于功率输入和填充比、工作流体以及显著改善传热性能的波纹蒸发器。在填充率为50%、输入功率为300瓦的情况下，与纯水相比，纳米流体的使用减少了约13%的热阻。在填充率为60%的情况下，使用纳米流体，与非波纹管相比，波纹管蒸发器的热阻降低了6%。一般来说，在所有情况下，随着输入功率的增加，热阻也会减小。

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来源期刊

Nanoscale and Microscale Thermophysical Engineering 工程技术-材料科学：表征与测试

CiteScore

5.90

自引率

2.40%

发文量

审稿时长

3.3 months

期刊介绍： Nanoscale and Microscale Thermophysical Engineering is a journal covering the basic science and engineering of nanoscale and microscale energy and mass transport, conversion, and storage processes. In addition, the journal addresses the uses of these principles for device and system applications in the fields of energy, environment, information, medicine, and transportation. The journal publishes both original research articles and reviews of historical accounts, latest progresses, and future directions in this rapidly advancing field. Papers deal with such topics as: transport and interactions of electrons, phonons, photons, and spins in solids, interfacial energy transport and phase change processes, microscale and nanoscale fluid and mass transport and chemical reaction, molecular-level energy transport, storage, conversion, reaction, and phase transition, near field thermal radiation and plasmonic effects, ultrafast and high spatial resolution measurements, multi length and time scale modeling and computations, processing of nanostructured materials, including composites, micro and nanoscale manufacturing, energy conversion and storage devices and systems, thermal management devices and systems, microfluidic and nanofluidic devices and systems, molecular analysis devices and systems.