Assisted convective heat transfer and entropy generation in a solar collector filled with nanofluid

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2016-12-29 DOI:10.3329/JNAME.V13I2.27774

R. Nasrin, M. A. Alim, M. Hasanuzzzaman

引用次数: 3

Abstract

Heat transfer phenomena of flat plate solar collector filled with different nanofluids has been investigated numerically. Galerkin’s Finite Element Method is used to solve the problem. Heat transfer rate, average bulk temperature, average sub-domain velocity, outlet temperature, thermal efficiency, mean entropy generation and Bejan number has been investigated by varying the solid nanoparticle volume fraction of water/Cu, water/Ag and water/Cu/Ag nanofluids from 0% to 3%. It is found that the solid nanoparticle volume fraction has great effect on heat transfer phenomena. It is observed that the increases of the solid volume fraction (up to 2%) enhances the heat transfer rate and collector efficiency where after 2% the rate of change almost constant. Higher heat transfer rate and collector efficiency has been obtained 19% and 13% for water/Ag nanofluid respectively.

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纳米流体在太阳能集热器中的辅助对流传热和熵生成

对不同纳米流体填充的平板太阳能集热器的传热现象进行了数值研究。采用伽辽金有限元法求解该问题。通过改变水/Cu、水/Ag和水/Cu/Ag纳米流体的固体纳米颗粒体积分数从0%到3%，研究了传热速率、平均体温、平均子域速度、出口温度、热效率、平均熵产和贝让数。研究发现，固体纳米颗粒体积分数对传热现象有很大影响。观察到，固体体积分数的增加(高达2%)提高了传热速率和集热器效率，而在2%之后，变化率几乎不变。水/银纳米流体的传热率和集热器效率分别为19%和13%。

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

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.