High performance heat sink with counter flow diverging microchannels
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 120344 |
Number of pages | 15 |
Journal / Publication | International Journal of Heat and Mass Transfer |
Volume | 162 |
Online published | 26 Aug 2020 |
Publication status | Published - Dec 2020 |
Link(s)
Abstract
Effective thermal management of high-power electronics is urgently demanded for the further development of electric vehicles. Two-phase flow boiling in microchannels is well recognized as a prominent approach for high density heat dissipation. This study develops a novel high performance heat sink with counter flow diverging microchannels to further enhance the flow boiling performance. A unique and significant heat exchange between the neighboring channels is demonstrated to dramatically alter the flow pattern transition in the counter-flow microchannel manifold. In particular, as the flowing bubbles in the microchannels can shrink or even disappear before exiting, no back flow or partial dry-out is observed throughout all the tested conditions. Therefore, this additional heat transfer mechanism in the present design enables significant enhancement of temperature uniformity, up to a heat flux of 2677 kW·m−2 with 45.1% increment of heat transfer coefficient, 73.8% reduction of pressure drop and 123.1% increment of coefficient of performance when compared with those of traditional co-current flow design. Overall, with the excellent flow boiling performance, the present study offers a highly promising microchannel design for a variety of applications requiring high heat flux dissipation.
Research Area(s)
- Coefficient of performance, Counter flow, Flow boiling, High heat dissipation, Microchannels heat sink
Citation Format(s)
High performance heat sink with counter flow diverging microchannels. / Jiang, Xingchi; Zhang, Shiwei; Li, Yuanjie et al.
In: International Journal of Heat and Mass Transfer, Vol. 162, 120344, 12.2020.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review