• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer efficiency of Al_2O_3-MWCNT/thermal oil hybrid nanofluid as a cooling fluid in thermal and energy management applications: An experimental and theoretical investigation
【24h】

Heat transfer efficiency of Al_2O_3-MWCNT/thermal oil hybrid nanofluid as a cooling fluid in thermal and energy management applications: An experimental and theoretical investigation

机译：Al_2O_3-MWCNT /导热油杂化纳米流体作为冷却液在热能管理中的传热效率：实验和理论研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The main objective of the present study is to assess the heat transfer efficiency of Al_2O_3-MWCNT/thermal oil hybrid nanofluid over different temperatures (25-50 ℃) and solid concentrations (O.125%-1.5%). To this end, first of all, the stability of the nano-oil has been studied through the Zeta potential analysis. Then, the dynamic viscosity and thermal conductivity of the nanofluid have been experimentally investigated. It was found that the nanofluid showed Newtonian behavior over the studied range of temperatures and solid concentrations. The dynamic viscosity showed increasing trend as the solid concentration increased. It is found that the minimum increase in dynamic viscosity is at the temperature of 50 ℃ in all the studied solid concentrations except 0.5% and 1%. As for the thermal conductivity, it showed increasing trend as the temperature and solid concentration increased. The maximum enhancement was at the temperature of 50 ℃ and solid concentration 1.5% by approximately 45%. Based on the experimental data, two new highly precise correlations to predict the dynamic viscosity and thermal conductivity of the studied nanofluid have been proposed. Moreover, the heat transfer efficiency of the nanofluid has been evaluated based on different figures of merit. It is revealed that using this nanofluid instead of the base fluid can be beneficial in all the studied solid concentrations and temperatures for both the internal laminar and turbulent flow regimes except the solid concentrations of 1 and 1.5% in internal turbulent flow regimes. The effect of adding nanoparticles on pumping power and convective heat transfer coefficient has also been theoretically investigated.
机译：本研究的主要目的是评估Al_2O_3-MWCNT /导热油杂化纳米流体在不同温度（25-50℃）和固体浓度（O.125％-1.5％）下的传热效率。为此，首先，通过Zeta电势分析研究了纳米油的稳定性。然后，通过实验研究了纳米流体的动态粘度和热导率。发现在研究的温度和固体浓度范围内，纳米流体表现出牛顿行为。随着固体浓度的增加，动态粘度显示出增加的趋势。研究发现，在所有研究的固体浓度中，除了0.5％和1％以外，动态粘度的最小增加都在50℃的温度下。至于热导率，随着温度和固体浓度的增加，它表现出增加的趋势。最大的增强作用是在50℃的温度和1.5％的固体浓度下增加约45％。基于实验数据，已提出了两个新的高精度关联来预测所研究的纳米流体的动态粘度和导热系数。此外，已经基于不同的品质因数评估了纳米流体的传热效率。结果表明，在内部层流和湍流状态下，使用这种纳米流体代替基础流体在所有研究的固体浓度和温度下都是有益的，但内部湍流状态下的固体浓度分别为1％和1.5％。从理论上也研究了添加纳米颗粒对泵浦功率和对流传热系数的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号