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首页> 外文期刊>Heat Transfer Engineering >An Experimental Investigation on the Effect of Ferrofluids on the Efficiency of Novel Parabolic Trough Solar Collector Under Laminar Flow Conditions
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An Experimental Investigation on the Effect of Ferrofluids on the Efficiency of Novel Parabolic Trough Solar Collector Under Laminar Flow Conditions

机译：铁磁流体对层流条件下新型抛物面槽太阳能收集器效果的实验研究

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摘要

The paper is related to the use of magnetic nanofluids (ferrofluids) in a direct absorption solar parabolic trough collector, which enhances thermal efficiency compared to conventional solar collectors. By applying the right magnetic intensity and magnetic field direction, the thermal conductivity of the fluid increased higher than typical nanofluids. Moreover, the ferrofluids exhibit excellent optical properties. The external magnetic source is installed to alter the thermo-physical properties of the fluid, and the absorber tube does not have selective surface allowing ferrofluids to absorb the incoming solar irradiance directly. In this paper, an experimental investigation of the performance of small scale direct absorption solar collector using ferrofluids as an absorber was conducted. Nanoparticle concentrations of 0.05 vol% at the operational temperatures between 19 degrees C and 40 degrees C were used in the current study. The results show that using ferrofluids as a heat transfer fluid increases the efficiency of solar collectors. In the presence of the external magnetic field, the solar collector efficiency increases to the maximum, 25% higher than the conventional parabolic trough. At higher temperatures, the ferrofluids show much better efficiency than conventional heat transfer fluid. The study indicated that nanofluids, even of low-content, have good absorption of solar radiation, and can improve the outlet temperatures and system efficiencies. The study shows the potential of using ferrofluids in the direct absorption solar collector.
机译：本文涉及在直接吸收太阳能抛物线收集器中使用磁性纳米流体（铁磁石），这与传统的太阳能收集器相比增强了热效率。通过施加正确的磁强度和磁场方向，流体的导热率高于典型的纳米流体。此外，铁磁流体表现出优异的光学性质。外部磁源被安装以改变流体的热物理性质，并且吸收管不具有选择性表面，使得铁物流体直接吸收进入的太阳辐照度。本文采用了使用铁氟流作为吸收器的小尺度直接吸收太阳能收集器的性能的实验研究。在目前的研究中使用了在19℃和40℃之间的操作温度下0.05体积％的纳米粒子浓度。结果表明，使用铁磁石作为传热流体增加了太阳能收集器的效率。在外部磁场的存在下，太阳能收集器效率增加到最大值，比传统的抛物线槽高25％。在较高的温度下，铁磁流体显示出比传统的传热流体更好的效率。该研究表明，纳米流体甚至低含量，具有良好的太阳辐射吸收，可以改善出口温度和系统效率。该研究表明了在直接吸收太阳能收集器中使用替铜流体的潜力。

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  • 来源
    《Heat Transfer Engineering》 |2019年第12期|753-761|共9页
  • 作者

    Alsaady Mustafa; Fu Rong; Yan Yuying; Liu Zeyu; Wu Shenyi; Boukhanouf Rabah;

  • 作者单位

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England|Univ Jeddah Chem Engn Dept Fac Engn Jeddah Saudi Arabia;

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England;

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England|Univ Nottingham Ningbo Ctr Fluids & Thermal Engn Res Ningbo Zhejiang Peoples R China;

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England;

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England;

    Univ Nottingham Fluids & Thermal Engn Res Grp Fac Engn Lenton Firs Bldg Univ Pk Nottingham NG7 2RD England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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