Experimental Investigation of Critical Heat Flux of Nucleate Pool Boiling of Water and Nanofluid on Platinum Wire Under Hypergravity and Earth Gravity

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-10 DOI:10.1007/s12217-023-10086-5

Yafeng Chen, Xiaohuan Li, Xiande Fang, Zhiqiang He, Yuxiang Fang

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Abstract

The experimental investigation of the critical heat flux (CHF) of saturated nucleate pool boiling of pure water and water-based Al₂O₃ nanofluids on the platinum wire with a diameter of 50 μm was conducted under earth gravity and hypergravity. The gravity level ranges from 1 to 3 g, the saturation pressures range from 0.1 to 0.6 MPa, and the Al₂O₃ concentration in the nanofluids ranges from 0.001wt% to 0.015wt%. The experimental results show that both pressure and gravity are vital factors enhancing the CHF, with the effect of pressure more pronounced. For nanofluids with concentration C > 0.005wt %, CHF initially increased with the increase in gravity. When the gravity is greater than 2 g, CHF does not increase further with the increase in gravity. Increasing nanoparticle concentration significantly enhances the CHF for low nanoparticle concentrations less than 0.005 wt%, and the CHFs change little for further increasing the concentration. Nanofluid has a stronger enhancement to the pool boiling CHF than the combination of the heating surface coated with the same kind of nanoparticles and the base fluid. With the increase of particles concentration, Surface modification gradually becomes dominant mechanism for CHF enhancement.

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超重力和地球重力条件下铂丝上水和纳米流体核团沸腾临界热通量的实验研究

在地球重力和超重力条件下，对直径为 50 μm 的铂丝上的纯水和水基 Al2O3 纳米流体的饱和核池沸腾临界热通量（CHF）进行了实验研究。重力水平为 1 至 3 g，饱和压力为 0.1 至 0.6 MPa，纳米流体中的 Al2O3 浓度为 0.001wt% 至 0.015wt%。实验结果表明，压力和重力都是增强 CHF 的重要因素，其中压力的影响更为明显。对于浓度为 C > 0.005wt % 的纳米流体，CHF 最初随着重力的增加而增加。当重力大于 2 g 时，CHF 不再随重力增加而增加。在纳米粒子浓度小于 0.005 wt% 的低浓度条件下，增加纳米粒子浓度可显著提高 CHF，进一步增加浓度时 CHF 变化不大。纳米流体对池沸CHF的增强作用要强于涂有同类纳米粒子的加热表面与基液的组合。随着颗粒浓度的增加，表面改性逐渐成为增强 CHF 的主要机制。

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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.