Scholarlink

<p>Recent research has focused on improving the performance of thermal management systems. Dispersing composite nanoparticles in the traditional heat transfer fluid known as hybrid nanofluids&#xa0;(HNF) has been an idea engaged for the augmentation of their thermophysical properties and thus their thermal performance. This work focused on the consequence of mass percentage ratio and temperature on the thermophysical properties of ZnO-MWCNT/deionized water (DIW) HNF. ZnO (20&#xa0;nm) nanoparticles hybridized with MWCNT (30–50&#xa0;nm) nanotube have been dispersed in DIW to synthesize composite nanoliquids at 0.1&#xa0;vol.% and by various mass% ratio of (ZnO: MWCNT) 20:80, 40:60, 60:40, and 80:20. The morphology of the prepared&#xa0;composite nanoliquids (NF) samples was monitored via standard instruments to assess their stability condition. The composite nanoliquids were detected to be stable. Then viscosity (<i>µ</i>), thermal conductivity (<i>κ</i>), and electrical conductivity (EC) (<i>σ</i>) of this HNF have been measured in temperatures ranging from 20 to 55&#xa0;°C. With the&#xa0;cumulative ratio of MWCNT and the temperature, while <i>µ</i> of this nanoliquid was noticed to decrease, an increase in <i>κ</i> was detected. The <i>σ</i> was slightly enhanced as the temperature and the&#xa0;ratio of ZnO nanoparticles increased with a decrease in the ratio of MWCNT. The minimum and maximum enhancements obtained are, respectively, 12.27% and 33.33% at 80:20 for the viscosity, 10.17% and 23.11% at 20:80 for the thermal conductivity, and 325.93% and 386.10% at 80:20 for the EC of ZnO-MWCNT/DIW hybrid nanoliquids in comparison with the based fluid. New correlations have been established to approximate the thermal conductivity of these composite nanoliquids as a function of temperature for all percentage ratios. The proposed correlations have been compared with existing correlations from literature. The HNF was found to have a lower viscosity than that of the single NF and is suitable for thermal management&#xa0;applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Preparation and measurement of thermophysical and electrical properties of ZnO-MWCNT/DIW hybrid nanofluid

  • 期刊论文

  • 发表日期：

    2025年3月15日

查看全文
  • M. Momin,
  • M. Sharifpur,
  • J. P. Meyer,
  • S. M. S. Murshed,
  • H. Yasmin

摘要

Recent research has focused on improving the performance of thermal management systems. Dispersing composite nanoparticles in the traditional heat transfer fluid known as hybrid nanofluids (HNF) has been an idea engaged for the augmentation of their thermophysical properties and thus their thermal performance. This work focused on the consequence of mass percentage ratio and temperature on the thermophysical properties of ZnO-MWCNT/deionized water (DIW) HNF. ZnO (20 nm) nanoparticles hybridized with MWCNT (30–50 nm) nanotube have been dispersed in DIW to synthesize composite nanoliquids at 0.1 vol.% and by various mass% ratio of (ZnO: MWCNT) 20:80, 40:60, 60:40, and 80:20. The morphology of the prepared composite nanoliquids (NF) samples was monitored via standard instruments to assess their stability condition. The composite nanoliquids were detected to be stable. Then viscosity (µ), thermal conductivity (κ), and electrical conductivity (EC) (σ) of this HNF have been measured in temperatures ranging from 20 to 55 °C. With the cumulative ratio of MWCNT and the temperature, while µ of this nanoliquid was noticed to decrease, an increase in κ was detected. The σ was slightly enhanced as the temperature and the ratio of ZnO nanoparticles increased with a decrease in the ratio of MWCNT. The minimum and maximum enhancements obtained are, respectively, 12.27% and 33.33% at 80:20 for the viscosity, 10.17% and 23.11% at 20:80 for the thermal conductivity, and 325.93% and 386.10% at 80:20 for the EC of ZnO-MWCNT/DIW hybrid nanoliquids in comparison with the based fluid. New correlations have been established to approximate the thermal conductivity of these composite nanoliquids as a function of temperature for all percentage ratios. The proposed correlations have been compared with existing correlations from literature. The HNF was found to have a lower viscosity than that of the single NF and is suitable for thermal management applications.