Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Yong-Dong Zhang, Miao-Ru Chen, Jung-Hsien Wu, Kuo-Shu Hung and Chi-Chuan Wang
Additional contact information
Yong-Dong Zhang: Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
Miao-Ru Chen: Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan
Jung-Hsien Wu: Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan
Kuo-Shu Hung: Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan
Chi-Chuan Wang: Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan

Energies, 2021, vol. 14, issue 12, 1-23

Abstract: This study proposes a novel design having dense fins with lesser thickness at the upper layer and comparatively spare fins with greater thickness in the lower layer to further improve the overall thermal performance of a double-layer microchannel heat sink. The design can effectively direct more low temperature fluid flow toward the lower layer to improve heat transfer while the sparse fin structure at low layer can ease pressure drop penalty. At the same time, the thicker fins at the lower layer ensure higher fin efficiency to facilitate high heat transfer. Parametric and detailed analysis is conducted for the proposed double-layer microchannel heat sink in comparison with the traditional one. After optimization, the thermal resistance of the proposed double-layer microchannel heat sink at the same pumping power is found to be reduced by 9.42% when compared to the traditional double-layer microchannel heat sink. Yet at the same Reynolds number, the Nusselt number of the proposed design exceeds the traditional value by 13%.

Keywords: double-layer microchannel heat sink; different geometry; computational fluid dynamics; thermal resistance; pumping power; response surface methodology (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/12/3585/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/12/3585/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:12:p:3585-:d:575971

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().