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标题：Study on the flow and heat dissipation of water-based alumina nanofluids in microchannels
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作者：Chunquan Li ; Jian Huang ; Yuling Shang 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2020
卷号：22
页码：100746
DOI：10.1016/j.csite.2020.100746
出版社：Elsevier B.V.
摘要：In this paper, the flow and heat dissipation performance of 0.1–0.5 vol per cent of Al₂O₃ -water nanofluid through serpentine micro-channel was experimentally studied in the Reynolds range 124–1000. By analyzing the experimental results of nanofluid flow and heat dissipation: In the experiment, the Nusselt number of nanofluids is 1.12–1.66 times that of deionized water, which indicates that Al₂O₃ -water nanofluids have significant heat transfer enhancement effect. Nanofluid flow resistance is 1.02–1.80 times that of deionized water, this indicates that Al₂O₃ -water nanofluid has the disadvantage of increasing energy consumption. From a comprehensive performance point of view: all the nanofluids used in the experiment have enhanced heat transfer factors more significant than one, and the enhanced heat transfer effect is better than that of deionized water, this suggests that Al₂O₃ -water nanofluid has the drawback of rising energy consumption. All the nanofluids used in the experiment have enhanced heat transfer factors more significant than one, and the enhanced heat transfer effect is better than that of deionized water. Nano-fluids, with a volume fraction of 0.4%, have an average increased heat transfer factor of 1.4, which is the best overall performance.
关键词：Serpentine microchannel ; Water-based alumina nanofluids ; Liquidity analysis ; Heat dissipation analysis