期刊
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
卷 114, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.icheatmasstransfer.2020.104589
关键词
Nanofluids; Forced convection; Thermal efficiency; Comprehensive performance
资金
- National Natural Science Foundation of China, China [51606214]
- Natural Science Foundation of Jiangsu Province, China [BK20181359]
Thermal efficiency is applied to research the hydraulic and thermal characteristics of nanofluids flowing around the heated circular cylinders with vertical fin in heat sink. The influences of fin heights (H = 2 mm, 3 mm, 4 mm) on the thermo-hydraulic characteristics of Fe3O4-water nanofluids are explored. Moreover, the influences of nano-particle mass fractions (omega = 0.0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%) and Reynolds numbers (Re = 491-1223) are investigated. Research shows that nanoparticle mass fraction (omega = 0.4%) and fin height (H = 3 mm) are the most suitable working conditions for the best heat exchange performance. Furthermore, the thermal efficiency and comprehensive performance index have been used to investigate the comprehensive cooling characteristics of the fin structures and nanofluids in the heat exchange system. It is discovered that thermal efficiency increases with the fin height. Comprehensive performance of the heat exchange system is significantly enhanced by the fin structure in circular cylinder.
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