Fe3O4/水纳米流体对管壳式换热器性能的改善

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-20 DOI:10.18186/thermal.1239793

Saad M. Najim, A. Hussein, S. Danook

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引用次数: 0

摘要

本文的目的是研究纳米流体对换热器性能的影响，以及对换热速率、总换热系数、摩擦影响和平均努塞尔数以及热效率因子的影响，并进行了研究和讨论。在层流条件下，对Fe3O4/水纳米流体通过管壳式换热器的输出换热进行了数值研究。利用ANSYS FLUENT 2020R1软件进行CFD仿真，采用有限体积法求解控制方程。在雷诺数为200 ~ 1400的条件下，以纳米颗粒为体积分数(0.2%和0.35%)进行了数值计算。结果表明，在0.35%的浓度下，纳米流体的增加努塞尔数、换热率和效率分别提高了19%、25%和12%左右。结果表明，摩擦随雷诺数的增加而减小。

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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Performance improvement of shell and tube heat exchanger by using Fe3O4/water nanofluid

The objective of this paper is to study the effect of nanofluid on the performance of the heat exchanger, as well as the heat transfer rate, coefficient of total heat transfer, friction influence and average Nusselt number, and thermal efficiency factor and has been investigated and discussed. In this work, the output heat transfer of Fe3O4/water nanofluid through shell and tube heat exchanger has been numerically investigated under laminar flow. CFD simulations with ANSYS FLUENT 2020R1 were used adopting finite volume approach to solve the governing equations. Numerical calculations were carried out for Reynolds numbers ranging from 200 to 1400, with nanoparticles as the volume fraction (0.2% and 0.35%). The results show that the augmentation in increase Nusselt number and amount of heat transfer rate and the efficiency of nanofluid at the concentration of 0.35% are approximately 19%, 25% and 12% respectively. It was observed through the results that the friction decreases as the Reynolds number increase.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.