0
Research Papers

Single-Phase and Two-Phase Hybrid Cooling Schemes for High-Heat-Flux Thermal Management of Defense Electronics

[+] Author and Article Information
Myung Ki Sung

Boiling and Two-Phase Flow Laboratory (BTPFL), Purdue University International Electronic Cooling Alliance (PUIECA), Mechanical Engineering Building, 585 Purdue Mall, West Lafayette, IN 47907-2088

Issam Mudawar1

Boiling and Two-Phase Flow Laboratory (BTPFL), Purdue University International Electronic Cooling Alliance (PUIECA), Mechanical Engineering Building, 585 Purdue Mall, West Lafayette, IN 47907-2088mudawar@ecn.purdue.edu

1

Corresponding author.

J. Electron. Packag 131(2), 021013 (Apr 21, 2009) (10 pages) doi:10.1115/1.3111253 History: Received July 01, 2008; Revised January 08, 2009; Published April 21, 2009

This study examines the cooling performance of two hybrid cooling schemes that capitalize on the merits of both microchannel flow and jet impingement to achieve the high cooling fluxes and uniform temperatures demanded by advanced defense electronics. The jets supply HFE 7100 liquid coolant gradually into each microchannel. The cooling performances of two different jet configurations, a series of circular jets and a single slot jet, are examined both numerically and experimentally. The single-phase performances of both configurations are accurately predicted using 3D numerical simulation. Numerical results point to complex interactions between the jets and the microchannel flow, and superior cooling performance is achieved by optimal selection of microchannel height. The two-phase cooling performance of the circular-jet configuration is found superior to that of the slot jet, especially in terms of high-flux heat dissipation. Unprecedented cooling fluxes, as high as 1127W/cm2, are achieved with the circular jets without incurring CHF.

FIGURES IN THIS ARTICLE
<>
Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of flow control system

Grahic Jump Location
Figure 2

(a) Test module construction and (b) cross section of module assembly

Grahic Jump Location
Figure 3

Schematics of unit cells for (a) circular jets and (b) slot jet

Grahic Jump Location
Figure 4

Numerical predictions of coolant velocity for Hch=1 mm and microchannel bottom wall temperature for Hch=1 and 3 mm along the centerline of microchannel for (a) Ujet=1 m/s and (b) Ujet=5 m/s

Grahic Jump Location
Figure 5

Numerical predictions of coolant velocity for Hch=6 mm and microchannel bottom wall temperature for Hch=3 and 6 mm along the centerline of microchannel for (a) Ujet=1 m/s and (b) Ujet=5 m/s

Grahic Jump Location
Figure 6

Thermocouple readings inside heater block versus jet Reynolds number for (a) circular jets and (b) slot jet

Grahic Jump Location
Figure 7

(a) Slot-jet pressure drop versus Reynolds number for q″eff=32 and 80 W/cm2 and (b) comparisons of pressure drops for circular jets and slot jet

Grahic Jump Location
Figure 8

Numerical predictions of microchannel sidewall temperature distribution for (a) circular jets at q″eff=162.15 W/cm2 and Q=3.71×10−5 m3/s, and (b) slot jet at q″eff=76.37 W/cm2 and Q=4.51×10−5 m3/s

Grahic Jump Location
Figure 9

Boiling curves measured at xtc1, xtc2, xtc3, and xtc4 for (a) circular jets at ΔTsub=68.2°C and Q=8.77×10−6 m3/s, and (b) slot jet at ΔTsub=68.1°C and Q=7.15×10−6 m3/s

Grahic Jump Location
Figure 10

Effects of subcooling on boiling curve for (a) circular jets at Q=2.15×10−5 m3/s and (b) slot jet at Q=3.53×10−6 m3/s

Grahic Jump Location
Figure 11

Effects of flow rate on boiling curve for (a) circular jets at ΔTsub=68.2°C and (b) slot jet at ΔTsub=68.1°C

Grahic Jump Location
Figure 12

Bubble growth and condensation inside hybrid module for (a) circular jets and (b) slot jet

Grahic Jump Location
Figure 13

Comparison of predictions of two-phase heat transfer coefficient correlation with HFE 7100 data for circular jets and slot jet

Grahic Jump Location
Figure 14

Boiling curves for circular jets with Ujet=2.75 m/s and Ujet=6.01 m/s

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In