An experimental investigation on pool boiling heat transfer enhancement using sol-gel derived nano-CuO porous coating 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics
年/卷/期
2019 / 103 /
页码
37-50
ISSN号
0894-1777
作者单位
Sree Buddha Coll Engn, Dept Mech Engn, Pattoor PO Nooranad, Alappuzha 690529, Kerala, India;Natl Inst Technol, Sch Nanosci & Technol, Calicut 673601, Kerala, India;Natl Inst Technol, Dept Mech Engn, Calicut 673601, Kerala, India;Curtin Univ, Dept Mech Engn, Perth, WA 6102, Australia;Natl Inst Technol, Sch Nanosci & Technol, Calicut 673601, Kerala, India;Natl Inst Technol, Dept Mech Engn, Tiruchchirappalli 620015, Tamil Nadu, India;Natl Inst Technol, Dept Mech Engn, Tiruchchirappalli 620015, Tamil Nadu, India;
作者
Mohan, Sreejith;Joseph, Albin;Kumar, C. S. Sujith;Mathew, Arun;Thomas, Shijo;Vishnu, B. R.;Sivapirakasam, S. P.;
摘要
This paper presents an experimental investigation aimed at studying the influence of nano-CuO coating on the pool boiling heat transfer enhancement of SS 316 LN stainless steel. The coating was developed using the sol-gel dip coating technique. The Scanning Electron Microscopic and X-Ray Diffraction apparatus were used to analyze morphological and structural characteristics of the coating. The complex interaction of coating process parameters on the boiling heat transfer coefficient was studied using the concept of design of experiment. The results reveal as much as 30% increase in the boiling heat transfer coefficient for the sol-gel derived CuO coated boiling surface compared to its uncoated counterpart. The coating was found to tailor the porosity, roughness and wettability of the surface. The heat transfer coefficient increased with an increase in porosity, roughness and decrease in wettability of the boiling surface. Analysis of variance results revealed that the molar concentration of the CuO sol was the most significant parameter influencing the heat transfer coefficient while sintering temperature was the least significant parameter.
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关键词/主题词
Nano-CuO;Sol-gel;Pool boiling;Heat transfer coefficient;Topography;Chemistry;
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