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首页> 外文期刊>Journal of Heat Transfer >Experimental Study of Thermal Performance of Nanofluid-Filled and Nanoparticles-Coated Mesh Wick Heat Pipes
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Experimental Study of Thermal Performance of Nanofluid-Filled and Nanoparticles-Coated Mesh Wick Heat Pipes

机译：纳米流体填充和纳米涂层网状芯吸热管热性能的实验研究

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摘要

The enhancements in thermal performance of mesh wick heat pipe (HP) using TiO _( 2 ) /H _( 2 ) O nanofluid (0.5, 1.0, and 1.5 vol %) as working fluid for different (50, 100, and 150 W) power input were investigated. Results showed maximum 17.2% reduction in thermal resistance and maximum 13.4% enhancement in thermal efficiency of HP using 1.0 vol % nanofluid as compared to water. The wick surface of the HP was then coated with TiO _( 2 ) nanoparticles by physical vapor deposition method. The experimental investigation had been also carried out on coated wick HP using water as working fluid. Results showed 12.1% reduction in thermal resistance and 11.9% enhancement in thermal efficiency of the HP as compared to uncoated wick HP using water. Temporal deteriorations in thermal performance during prolonged working (2, 4, and 6 months) of HP were also studied. Temporal deterioration in thermal performance of HP filled with nanofluid depends upon the deterioration in thermophysical properties of nanofluids. The deterioration is due to the agglomeration and sedimentation of nanoparticles with respect to the time. Comparative study shows that after a certain time of operation, thermal performance of HP with nanoparticle coated wick superseded that of the HP filled with nanofluid. Therefore, nanoparticle coating might be a good substitute for nanofluid to avoid the stability issues. The present paper provides incentives for further research to develop nanofluids that avoid the encountered sedimentation or agglomeration.
机译：使用TiO _（2）/ H _（2）O纳米流体（0.5、1.0和1.5 vol％）作为不同（50、100和150 W）工作流体的网状芯吸热管（HP）的热性能增强）的电源输入进行了调查。结果显示，与水相比，使用1.0 vol％的纳米流体可以使HP的最大热阻降低17.2％，最大提高热效率13.4％。然后，通过物理气相沉积法，用TiO_（2）纳米粒子涂覆HP的灯芯表面。还使用水作为工作液，对涂覆的灯芯HP进行了实验研究。结果表明，与不带涂层的芯吸水相比，HP的耐热性降低了12.1％，HP的热效率提高了11.9％。还研究了HP长时间工作（2、4和6个月）期间热性能的暂时下降。填充纳米流体的HP的热性能随时间的变化取决于纳米流体的热物理性能的下降。劣化是由于纳米粒子相对于时间的附聚和沉降。对比研究表明，经过一定时间的操作，纳米颗粒包裹芯的HP的热性能取代了纳米流体填充的HP的热性能。因此，纳米粒子涂层可能是纳米流体的良好替代品，以避免稳定性问题。本文为进一步研究开发避免遇到沉淀或团聚的纳米流体提供了动力。

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  • 来源
    《Journal of Heat Transfer》 |2018年第10期|102403.1-102403.7|共7页
  • 作者

    Naveen Kumar Gupta; Arun Kumar Tiwari; Subrata Kumar Ghosh;

  • 作者单位

    Department of Mechanical Engineering,Indian Institute of Technology (ISM),Department of Mechanical Engineering,Institute of Engineering and Technology,GLA University;

    Department of Mechanical Engineering,Institute of Engineering andTechnology Lucknow;

    Department of Mechanical Engineering,Indian Institute of Technology (ISM);

  • 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

    Nanoparticles; Heat pipes; Nanofluids; Water; Stability; Fluids;

    机译：纳米颗粒;热管;纳米流体;水;稳定性;流体;

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