在工业热交换器中使用氧化石墨烯纳米流体进行热传递增强
Omid Khouri1, Hamid Reza Goshayeshi1, Seyed Borhan Mousavi2
1Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad 19585-466, Iran.
ACS omega
|June 10, 2024
概括
这项研究表明,氧化石墨烯 (GO) 纳米流体通过增加热导率来提高换热器性能. 优化的GO度和温度显著提高了传热效率.
科学领域:
- 材料科学 材料科学 材料科学
- 热力学是一种热力学.
- 热传递工程 热传递工程
背景情况:
- 工业换热器对于能源效率至关重要.
- 纳米流体具有提高热性能的潜力.
- 石墨烯氧化物 (GO) 是热传递应用的有前途的纳米材料.
研究的目的:
- 综合评估基于水的GO纳米流体的传热特性.
- 为了研究温度和GO度对纳米流体特性的影响.
- 为预测热传递增强开发一种相关性.
主要方法:
- 建造一个缩小规模的工业换热器设备.
- 对GO纳米流体特性 (导热率,比热,粘度等) 的实验检查. 在不同的条件下.
- 导出一个新的努塞尔特数相关方程.
主要成果:
- 热导率随着温度和GO度的增加而增加,达到0.380 W m-1 K-1.
- 特定热容量随着温度的上升而上升,但随着更高的GO含量而下降.
- 粘度随着GO度的增加而增加,在更高的温度下观察到的最低值.
结论:
- GO纳米流体显著提高了热交换器中的传热率.
- 导出的努塞尔特数相关性准确地预测了热传递增强.
- 这些发现支持纳米流体的优化,以提高热系统性能.
更多相关视频
07:32Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
Published on: April 10, 2017
9.0K
10:39Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
Published on: January 15, 2016
12.6K
相关概念视频
01:14Mechanisms of Heat Transfer I
4.2K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.2K
01:20Mechanisms of Heat Transfer II
3.2K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.2K