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Article

A Comparative Study of Cooling of High Power Density Electronics Using Sprays and Microjets

[+] Author and Article Information
Matteo Fabbri, Shanjuan Jiang, Vijay K. Dhir

Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095

J. Heat Transfer 127(1), 38-48 (Feb 15, 2005) (11 pages) doi:10.1115/1.1804205 History: Received May 12, 2004; Revised July 24, 2004; Online February 15, 2005
Copyright © 2005 by ASME
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References

Webb,  B. W., and Ma,  C. F., 1995, “Single-Phase Liquid Jet Impingement,” Adv. Heat Transfer, 26, pp. 105–217.
Elison,  B., and Webb,  B. W., 1994, “Local Heat Transfer to Impinging Liquid Jets in the Initially Laminar, Transitional, and Turbulent Regimes,” Int. J. Heat Mass Transfer, 37(8), pp. 1207–1216.
Jiji, L. J., and Dagan, Z., 1987, “Experimental Investigation of Single-Phase Multijet Impingement Cooling of an Array of Microelectronic Heat Sources,” Proceedings of the International Symposium on Cooling Technology for Electronic Equipment, W. Aung, ed., Hemisphere Publishing Corporation, Washington, D.C., pp. 333–351.
Pan,  Y., and Webb,  B. W., 1995, “Heat Transfer Characteristics of Arrays of Free-Surface Liquid Jets,” ASME J. Heat Transfer, 117, pp. 878–883.
Womac,  D. J., Incropera,  F. P., and Ramadhyani,  S., 1994, “Correlating Equations for Impingement Cooling of Small Heat Sources With Multiple Circular Liquid Jets,” ASME J. Heat Transfer, 116, pp. 482–486.
Womac,  D. J., Ramadhyani,  S., and Incropera,  F. P., 1993, “Correlating Equations for Impingement Cooling of Small Heat Sources With Single Circular Liquid Jets,” ASME J. Heat Transfer, 115, pp. 106–115.
Yonehara, N., and Ito, I., 1982, “Cooling Characteristics of Impinging Multiple Water Jets on a Horizontal Plane,” Technol. Rep. Kansai University, 24 , pp. 267–281.
Oliphant,  K., Webb,  B. W., and McQuay,  M. Q., 1998, “An Experimental Comparison of Liquid Jet Array and Spray Impingement Cooling in the Non-Boiling Regime,” Exp. Therm. Fluid Sci., 18, pp. 1–10.
Jiang, S., 2002, “Heat Removal Using Microjet Arrays and Microdroplets in Open and Closed Systems for Electronic Cooling,” Ph.D. Dissertation, University of California, Los Angeles, CA.
Fabbri, M., Jiang, S., and Dhir, V. K., 2004, “Optimized Heat Transfer for High Power Electronic Cooling Under Arrays of Microjets,” submitted to the ASME J. Heat Transfer, accepted for publication.
Bonacina,  C., Del Giudice,  S., and Comini,  G., 1979, “Dropwise Evaporation,” ASME J. Heat Transfer, 101, pp. 441–446.
Ghodbane,  M., and Holman,  J. P., 1991, “Experimental Study of Spray Cooling With Freon-113,” Int. J. Heat Mass Transfer, 34(4,5), pp. 1163–1174.
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Cho, C., and Ponzel, R., 1997, “Experimental Study on the Spray Cooling of a Heated Solid Surface,” Proceedings of the ASME Fluids Engineering Division, 244 , pp. 265–272.
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Figures

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Schematic of the experimental setup
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Details of the test section
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HAGO nozzle and spray details
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Details of the diode and the jets
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Schematic of the RTDs placement
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Comparison of spray data for two flowrates (a) 50.56 ml/min [2.87 μl/mm2  s] and (b) 81.56 ml/min [4.63 μl/mm2  s], with the predictions of Holman et al. 1213 and Cho et al. 15
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Comparison between spray and micro jets performance for two flowrates (a) 50.56 ml/min [2.87 μl/mm2  s] and (b) 81.56 ml/min [4.63 μl/mm2  s]
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Comparison of process efficiency between spray and micro jets for two flowrates (a) 50.56 ml/min [2.87 μl/mm2  s] and (b) 81.56 ml/min [4.63 μl/mm2  s]
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Comparison between spray and micro jets performance for the same pumping power
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Comparison of the present data with the results by Oliphant et al. 8
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Cooling module test results (4×6 array of jets, dn=140 μm,s=2 mm): heat flux as a function of Tchip−Tliq
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Heat flux as a function of wall superheat
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Equivalent thermal circuit for the cooling module
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Cooling module test results: external resistance versus air flowrate
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Cooling module test results

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