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首页> 外文期刊>International Journal of Heat and Mass Transfer >Thermal performance of self-rewetting gold nanofluids: Application to two-phase heat transfer devices
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Thermal performance of self-rewetting gold nanofluids: Application to two-phase heat transfer devices

机译：自重润湿金纳米流体的热性能：应用于两相传热装置

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摘要

This paper presents an experimental analysis of the phenomenon of phase change inside a porous medium using different types of working fluids. It represents the impact of these fluids on improving the characteristics of heat and mass transfer in a Capillary Heat Pipe (CHP). In this study, gold nanoparti-cles (5 nm in diameter with 1% C_v), a self-rewetting binary solution (butanol with 3% C_v), and a mixture of self-rewetting butanol and gold nanofluid are considered to be the operating fluids within the CHP. The experiments are carried out after designing and developing the capillary heat pipe section. It consists of a water tank with a pump, an evaporator attached to a copper porous medium on which thermocouples and power supplies are placed. The experimental results showed the positive influence of gold nanopar-ticles on the thermal system's performance by reducing the thermal resistance by 13% compared to pure water as the base working fluid. In addition, a self-rewetting butanol solution showed improvement in the performance of the capillary evaporator by decreasing its casing temperature. While a mixture of self-rewetting butanol solution (3 % C_v) and gold nanofluid (1% C_v) exhibited the best performance of heat and mass transfer performance by reducing the thermal resistance of the system by approximately 22 %. To explain the mechanism for improving heat transfer, the phase change phenomenon was visualized by an infrared camera for the three working fluids. It is shown that as the applied power increases, the shape of the vapor pocket developed in the wick also increases, for pure water, until it reaches a stable form. Whereas, with respect to nanofluid and self-rewetting fluid, the shape of the vapor pockets was smaller than that of pure water allowing more efficient mass and heat transfer. The thermophysical properties of these fluids such as thermal conductivity, stability, surface tension, Marangoni, wettability, and capillary forces were presented to ensure and validate the decrease in the vapor pocket as well as the enhancement of the CHP thermal system.
机译：本文介绍了使用不同类型的工作流体内部多孔介质内相变现象的实验分析。它代表这些流体对提高毛细管热管（CHP）中的热量和质量传递特性的影响。在该研究中，金纳米氨酸（直径为1％C_V的5nm），一种自重重新润湿二元溶液（丁醇，丁醇，具有3％C_V），以及自重污水丁醇和金纳米流体的混合物被认为是操作CHP内的液体。实验在设计和开发毛细管热管部分后进行。它由带泵的水箱组成，蒸发器附接到铜多孔介质，在该铜多孔介质上放置了热电偶和电源。实验结果表明，与纯水作为基础工作流体相比，通过将热阻降低13％，金纳米铝纸对热系统性能的积极影响。此外，通过降低其壳体温度，自重回润丁醇溶液显示毛细血管蒸发器的性能的改善。而通过将系统的热阻降低约22％，虽然自重润湿丁醇溶液（3％C_V）和金纳米流体（1％C_V）的混合物表现出最佳性能和质量传递性能。为了解释改善传热的机制，通过用于三个工作流体的红​​外相机可视化相变现象。结果表明，随着施加的功率增加，芯片中显影的蒸汽袋的形状也增加，对于纯净水，直到它达到稳定的形式。然而，相对于纳米流体和自重式流体，蒸汽袋的形状小于纯水的形状，允许更有效的质量和热传递。介绍了这些流体的热物理性质，例如导热率，稳定性，表面张力，Marangoni，润湿性和毛细管力，以确保并验证蒸汽袋的减少以及CHP热系统的增强。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第8期|121322.1-121322.9|共9页
  • 作者

    Ibrahim Zaaroura; Souad Harmand; Julien Carlier; Malika Toubal; Aurelie Fasquelle; Bertrand Nongaillard;

  • 作者单位

    Univ. Polytechnique Hauts-de-France CNRS UMR 8201- LAMIH - Laboratoire d'Automatique de Mecanique et d'Informatique Industrielles et Humaines F-59313 Valenciennes France Univ. Polytechnique Hauts-de-France CNRS Univ. Lille YNCREA Centrale Lille UMR 8520 - IEMN -DOAE F-59313 Valenciennes France;

    Univ. Polytechnique Hauts-de-France CNRS UMR 8201- LAMIH - Laboratoire d'Automatique de Mecanique et d'Informatique Industrielles et Humaines F-59313 Valenciennes France;

    Univ. Polytechnique Hauts-de-France CNRS Univ. Lille YNCREA Centrale Lille UMR 8520 - IEMN -DOAE F-59313 Valenciennes France;

    Univ. Polytechnique Hauts-de-France CNRS Univ. Lille YNCREA Centrale Lille UMR 8520 - IEMN -DOAE F-59313 Valenciennes France;

    Jeumont Electric 59460 Jeumont France;

    Univ. Polytechnique Hauts-de-France CNRS Univ. Lille YNCREA Centrale Lille UMR 8520 - IEMN -DOAE F-59313 Valenciennes France;

  • 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

    Gold nanofluids; Self-rewetting fluids; Heat pipes; Phase change; Visualization;

    机译：金纳米流体;自润湿流体;热管;相变;可视化;

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