Dispersion stability and thermal conductivity of modified ZnO/HFE-7100 nano-coolant

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-26 DOI:10.1016/j.ijrefrig.2025.03.039

Yuxin Yang , Rixin Zhang , Rui Liang , Yike Gao , Chenyang Zhang , Junwei Cui , Shengshan Bi

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引用次数: 0

Abstract

In this work, ZnO nanoparticle was surface modified with the PFPE-acid as ligand. The modified ZnO particle size was about 30 nm measured by SEM. The modified ZnO/HFE-7100 nano-coolants with mass fractions of 0.10 % - 0.40 % were prepared and characterized, and their dispersion stabilities were evaluated by visual sedimentation and UV spectrophotometer. Then the thermal conductivities of these nano-coolants were measured using a visualized transient hot-wire system. Results show that the thermal conductivity of the modified ZnO/HFE-7100 nano-coolants increased with the increasing mass fraction of nanoparticles and temperature, and 4.94 %-16.24 % enhancement were found compared to the base fluid. Based on the experimental data, a thermal conductivity model of nano-coolant was developed, and the deviation of the calculated thermal conductivity from the experimental value was less than ± 1.10 %.

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改性ZnO/HFE-7100纳米冷却剂的分散稳定性和导热性能

本文以pfpe -酸为配体对氧化锌纳米粒子进行了表面改性。SEM测得改性ZnO的粒径约为30 nm。制备了质量分数为0.10% ~ 0.40%的改性ZnO/HFE-7100纳米冷却剂，并对其进行了表征，采用目视沉降法和紫外分光光度计对其分散稳定性进行了评价。然后使用可视化瞬态热线系统测量这些纳米冷却剂的导热系数。结果表明：改性ZnO/HFE-7100纳米冷却剂的导热系数随着纳米颗粒质量分数的增加和温度的升高而提高，与基液相比，导热系数提高了4.94% ~ 16.24%；基于实验数据，建立了纳米冷却剂的导热系数模型，计算结果与实验值的偏差小于±1.10%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.