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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 機械工程學系所 > 依資料類型分類 > 期刊論文 >  Experimental microchannel heat sink performance studies using nanofluids

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標題: Experimental microchannel heat sink performance studies using nanofluids
作者: Chein, Reiyu;Chuang, Jason
Contributors: 國立中興大學機械工程學系
National Chung Hsing University,Department of Mechanical Engineering
Miao-zhen Luo
關鍵字: Microchannel heat sink (MCHS);Nanofluid;Particle volume fraction and particle agglomeration
日期: 2007-1
Issue Date: 2012-10-26 10:26:43 (UTC+8)
Publisher: Elsevier Masson SAS.
摘要: In this study, microchannel heat sink (MCHS) performance using nanofluids as coolants is addressed. We first carried out a simple theoretical analysis that indicated more energy and lower MCHS wall temperature could be obtained under the assumption that heat transfer could be enhanced by the presence of nanoparticles. Experiments were then performed to verify the theoretical predictions. A silicon MCHS was made and CuO-H2O mixtures without a dispersion agent were used as the coolants. The CuO particle volume fraction was in the range of 0.2 to 0.4%. It was found that nanofluid-cooled MCHS could absorb more energy than water-cooled MCHS when the flow rate was low. For high flow rates, the heat transfer was dominated by the volume flow rate and nanoparticles did not contribute to the extra heat absorption. The measured MCHS wall temperature variations agreed with the theoretical prediction for low flow rate. For high flow rate, the measured MCHS wall temperatures did not completely agree with the theoretical prediction due to the particle agglomeration and deposition. It was also found that raising the nanofluid bulk temperature could prevent the particles from being agglomerated into larger scale particle clusters. The experimental result also indicated that only slightly increase in pressure drop due to the presence of nanoparticles in MCHS operation.
Relation: International Journal of Thermal Sciences, Volume 46, Issue 1, Page(s) 57-66.
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