Effects of surface modifications on pool boiling heat transfer with HFE-7100
Effects of surface modifications on pool boiling heat transfer with HFE-7100
复制标题
表面改性对 HFE-7100 池沸腾传热的影响
DOI：
10.1016/j.ijft.2023.100286
复制
发表时间：
2023
影响因子：
--
通讯作者：
Kharangate, Chirag
中科院分区：
文献类型：
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作者：
Mlakar, Genesis;Huang, Cho-Ning;Kharangate, Chirag
本研究探讨了HFE-7100在铜表面上的池沸腾。本研究的主要目的是研究表面改性对核态沸腾性能的影响。研究的表面增强粗糙度，人工成核网站，以及两者的组合。在0.480 μm ~ 7.564 μm的粗糙度范围内，换热系数随粗糙度的增大而增大。观察孔直径为1 mm至3 mm，孔间距或间距与直径之比为1.75至3.5;与粗糙度为0.480 μm的裸露表面相比，孔径为1 mm且间距为2.5的构造提供了对传热系数的最佳改善，而孔直径为1 mm、孔间距为3.5的结构与粗糙度为0.480 μm的裸表面相比，提供了较差的传热系数。与粗糙度为0.480 μm的裸露表面以及单独的孔图案相比，将粗糙度应用于孔图案也随着粗糙度的增加而提高了传热系数。大多数的表面增强模式产生的传热系数的整体改善。表面强化的引入降低了所有样品的临界热通量。
This study explores pool boiling of HFE-7100 on copper surfaces. The key objective of this study was to examine the effects that surface modifications have on nucleate boiling performance. The surface enhancements studied are roughness, artificial nucleation sites, and a combination of both. Observing roughness between 0.480 μm to 7.564 μm shows that the heat transfer coefficient improves with increasing roughness. Observing hole diameters from 1 mm to 3 mm and hole pitch, or spacing to diameter ratio, from 1.75 to 3.5; a configuration with a hole diameter of 1 mm and pitch of 2.5 provides the best improvement to heat transfer coefficient compared to a bare surface with a roughness of 0.480 μm, while the configuration with a hole diameter of 1 mm and pitch of 3.5 provides worse heat transfer coefficient compared to a bare surface with a roughness of 0.480 μm. Applying a roughness to a hole pattern also improves the heat transfer coefficient with increasing roughness compared to both a bare surface with a roughness of 0.480 μm, as well as to the hole pattern alone. The majority of the surface enhancement modes yield overall improvements in heat transfer coefficient. The introduction of surface enhancement decreases critical heat flux across all samples.