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首页> 外文期刊>Energy Conversion & Management >Rheological and thermophysical properties of ultra-stable kerosene-based Fe3O4/Graphene nanofluids for energy conservation
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Rheological and thermophysical properties of ultra-stable kerosene-based Fe3O4/Graphene nanofluids for energy conservation

机译：超稳定煤油基Fe3O4 /石墨烯纳米流体的流变学和热物理性质

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摘要

This research deals with a novel synthesis method for preparation of Fe3O4 decorated Graphene and its application as a kerosene-based nanofluid with the purpose of heat transfer enhancement. In order to stabilize the Graphene-Fe3O4 nanoparticles, oleic acid was grafted on the surface of nanoparticles by chemisorption. Synthesized nanohybrid was characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), Dynamic light scattering (DLS) and UV-Vis spectrophotometer. The nanofluid remains stable for more than five months without any sedimentation. Moreover, rheological and thermal properties of nanofluids were measured. Viscosity increment, especially in low concentrations of nanoparticles was negligible enough for industrial applications and density enhancement is completely negligible even in high concentrations. The thermal conductivity was improved 31% at 50 degrees C, compared to the base fluid. In order to examine convective heat transfer enhancement, an experimental setup was designed and measurements were examined in Reynolds numbers between 2166 and 4553. The maximum heat transfer enhancement was 66% at Reynolds number of 4553 and 0.3 wt.% of nanoparticle. Increase in particles loading and Reynolds number causes convective heat transfer coefficient to improve. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究涉及一种新的合成方法，用于制备装饰有Fe3O4的石墨烯，并将其用作煤油基纳米流体，以提高传热的目的。为了稳定石墨烯-Fe 3 O 4纳米颗粒，通过化学吸附将油酸接枝到纳米颗粒的表面上。通过X射线粉末衍射（XRD），傅立叶变换红外光谱（FTIR），透射电子显微镜（TEM），动态光散射（DLS）和UV-Vis分光光度计对合成的纳米杂化物进行了表征。纳米流体保持稳定超过五个月没有任何沉淀。此外，测量了纳米流体的流变学和热学性质。对于工业应用，粘度增加，特别是在低浓度的纳米颗粒中，可以忽略不计，而即使在高浓度下，密度增加也可以忽略不计。与基础流体相比，在50摄氏度时导热系数提高了31％。为了检查对流传热的增强，设计了一个实验装置，并检查了2166至4553之间的雷诺数。在4553的雷诺数和纳米粒子的0.3 wt％时，最大传热增强为66％。颗粒载荷和雷诺数的增加导致对流传热系数的提高。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy Conversion & Management》 |2016年第11期|134-144|共11页
  • 作者

    Askari S.; Lotfi R.; Rashidi A. M.; Koolivand H.; Koolivand-Salooki M.;

  • 作者单位

    RIPI, Nanotechnol Res Ctr, West Blvd Azadi Sports Complex,POB 14665-1998, Tehran, Iran;

    RIPI, Nanotechnol Res Ctr, West Blvd Azadi Sports Complex,POB 14665-1998, Tehran, Iran|Penn State Univ, Dept Mech Engn, Univ Pk,POB 16803, State Coll, PA 16801 USA;

    RIPI, Nanotechnol Res Ctr, West Blvd Azadi Sports Complex,POB 14665-1998, Tehran, Iran;

    RIPI, Nanotechnol Res Ctr, West Blvd Azadi Sports Complex,POB 14665-1998, Tehran, Iran;

    RIPI, Gas Res Div, West Blvd Azadi Sports Complex,POB 14665-1998, Tehran, Iran;

  • 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

    Nanofluid; Fe3O4; Graphene; Hybrid; Kerosene; Heat transfer;

    机译：纳米流体;Fe3O4;石墨烯;杂化;煤油;传热;

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