Journal
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Volume 134, Issue -, Pages 27-39Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2018.07.043
Keywords
Hybrid heat sink; Microchannel; Pinfin; Hotspot thermal management; Energy efficient; Electronic cooling
Categories
Funding
- Inha University
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An energy-efficient micro heat sink is presented for the thermal management of microprocessors with heterogeneous power distributions. The performance of the proposed microchannel-pinfin hybrid heat sink was evaluated numerically and compared with that of a simple microchannel heat sink. The hybrid heat sink was designed with two separate zones: rectangular microchannels were used over the low-heat-flux zone (background area), and an array of cylindrical pinfins were incorporated over the high-heat-flux zone (hotspot area) of the heat sink. Conjugate heat transfer analysis was performed by solving the three-dimensional Navier-Stokes and energy equations with the temperature-dependent thermophysical properties of the fluid. The thermal resistance, pumping power, temperature non-uniformity, and maximum temperature rise at the hotspot were selected as the performance parameters. The hybrid heat sink exhibited remarkable improvement in the thermal performance compared to the non-hybrid heat sink with a reasonable increase in the pumping power.
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