ABSTRACT

Pool boiling of ethanol and Cu-nanofluid was investigated on bare and novel supersonic nanoblown polymer nanofiber nanotextured copper surface. Significant improvement in early ONB (2°C reduction), CHF (23.5%), and BHTC (~2–2.5 times) were achieved in nanotextured surface than bare one. Boiling of nanofluids led to the degradation of ONB and BHTC, with an increase in CHF by 16.7%. Synergistic effect of nanofluid boiling on nanotextured surface led to remarkable enhancement of CHF (44%), BHTC (>2.5 times), and ONB (3°C reduction). The nanofluid and nanotexture aided in ONB and CHF via enhancing nucleation sites, liquid overheating, bubble chopping, and surface wettability.

摘要

在裸露和新型超音速纳米吹塑聚合物纳米纤维纳米纹理铜表面上研究了乙醇和铜纳米流体的池沸腾。与裸表面相比，纳米纹理表面的早期 ONB（降低 2°C）、CHF（23.5%）和 BHTC（~2-2.5 倍）显着改善。纳米流体的沸腾导致 ONB 和 BHTC 的降解，使 CHF 增加了 16.7%。纳米流体沸腾对纳米纹理表面的协同作用导致 CHF (44%)、BHTC (>2.5 倍) 和 ONB (降低 3°C) 的显着增强。纳米流体和纳米纹理通过增强成核位点、液体过热、气泡破碎和表面润湿性来辅助 ONB 和 CHF。