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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effect of nanofluids on reflood heat transfer in a long vertical tube
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Effect of nanofluids on reflood heat transfer in a long vertical tube

机译：纳米流体对长垂直管中回热传热的影响

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摘要

Experiments were conducted to investigate the effect of nanofluids on reflood heat transfer in a hot vertical tube. The nanofluids, which are produced by dispersing nano-sized particles in traditional base fluids such as water, ethylene glycol, and engine oil, are expected to have a reasonable potential to enhance a heat transfer. 0.1 volume fraction (%) Al_2O_3/water nanofluid was prepared by two-step method and 0.1 volume fraction (%) carbon nano colloid (CNC) was prepared by the process self-dispersing by carboxyl formed particle surface. Transmission electron microscopy (TEM) images are acquired to characterize the shape and size of Al_2O_3 and graphite nanoparticles. The dispersion behavior of nanofluids was investigated with zeta potential values. And then, the reflood tests have been performed using water and nanofluids. We have observed a more enhanced cooling performance in the case of the nanofluid reflood. Consequently, the cooling performance is enhanced more than 13 s and 20 s for Al_2O_3/water nanofluid and CNC.
机译：进行实验以研究纳米流体对热垂直管中回热传热的影响。通过将纳米尺寸的颗粒分散在传统的基础流体（例如水，乙二醇和发动机油）中而产生的纳米流体，有望具有合理的潜力来增强传热。通过两步法制备0.1体积分数（％）的Al_2O_3 /水纳米流体，并通过在羧基形成的颗粒表面进行自分散处理，制备0.1体积分数（％）的碳纳米胶体（CNC）。获取透射电子显微镜（TEM）图像以表征Al_2O_3和石墨纳米粒子的形状和尺寸。用ζ电势值研究了纳米流体的分散行为。然后，使用水和纳米流体进行了防洪测试。我们已经观察到，在纳米流体回注的情况下，冷却性能更加增强。因此，对于Al_2O_3 /水纳米流体和CNC，冷却性能提高了13 s和20 s以上。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第18期|p.4766-4771|共6页
  • 作者

    Seung Won Lee; Se Young Chun; Chul Hwa Song; In Cheol Bang;

  • 作者单位

    Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), WO Banyeon-ri, Eonyang-eup, Ulju-gun,Ulsan Metropolitan City 689-798, Republic of Korea;

    ThermalHydraulics Safety Research Division, Korea Atomic Energy Research Institute (KAERI), 1045 Daedeokdaero, Yuseong, Daejeon 305-353, Republic of Korea;

    ThermalHydraulics Safety Research Division, Korea Atomic Energy Research Institute (KAERI), 1045 Daedeokdaero, Yuseong, Daejeon 305-353, Republic of Korea;

    Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), WO Banyeon-ri, Eonyang-eup, Ulju-gun,Ulsan Metropolitan City 689-798, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanofluids; reflood; severe accident; zeta potential; cooling performance;

    机译：纳米流体;回注;严重事故;ζ电位;冷却性能;

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