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Research Papers

Design and Optimization of Multiple Microchannel Heat Transfer Systems

[+] Author and Article Information
Jingru Zhang

Department of Mechanical and
Aerospace Engineering,
Rutgers, The State University of New Jersey,
Piscataway, NJ 08854

Po Ting Lin

Institute of Biomedical Technology,
R&D Center for Microsystem Reliability,
Chung Yuan Christian University,
Chungli City, Taiwan 32032
email: potinglin@cycu.edu.tw

Yogesh Jaluria

Department of Mechanical and
Aerospace Engineering,
Rutgers, The State University of New Jersey,
Piscataway, NJ 08854
e-mail: jaluria@jove.rutgers.edu

Manuscript received January 15, 2013; final manuscript received May 9, 2013; published online October 21, 2013. Assoc. Editor: Mehmet Arik.

J. Thermal Sci. Eng. Appl 6(1), 011004 (Oct 21, 2013) (10 pages) Paper No: TSEA-13-1008; doi: 10.1115/1.4024706 History: Received January 15, 2013; Revised May 09, 2013

In this paper, two different configurations of multiple microchannel heat sinks, with fluid flow, are investigated for heat removal: straight and U-shaped channel designs. Numerical models are utilized to study the multiphysics behavior in the microchannels and these are validated by comparisons with experimental results. The main focus of this work is on the design and optimization of these systems and to outline the methodology that may be used for other similar thermal systems. Three responses, including thermal resistance, pressure drop, and maximum temperature, are parametrically modeled with respect to various design variables and operating conditions such as dimensions of the channels, total number of channels, and flow rate. Multi-objective optimization problems, which minimize the thermal resistance and the pressure drop simultaneously, are formulated and studied. Physical constraints in terms of channel height, maximum temperature, and pressure are further investigated. The Pareto frontiers are studied and the trade-off behavior between the thermal resistance and the pressure drop are discussed. Characteristic results are presented and discussed.

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Figures

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Fig. 1

Sketch of the straight microchannel heat sink model

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Fig. 2

Sketch of the U-shaped microchannel heat sink model

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Fig. 3

Comparison of experimental and numerical results for the outlet temperature

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Fig. 4

Comparison of experimental and numerical results for the pressure drop

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Fig. 5

Surfaces at uniform values of the thermal resistance (isosurfaces) for straight channels

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Fig. 6

Isosurfaces of pressure drop for straight channels

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Fig. 7

Isosurfaces of maximum temperatures for straight channels

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Fig. 8

Isosurfaces of thermal resistance for U-shaped channels

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Fig. 9

Pressure drop for U-shaped channels

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Fig. 10

Maximum temperature for U-shaped channels

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Fig. 11

Pareto frontiers for example 1

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Fig. 12

Pareto frontiers for example 2

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Fig. 13

Pareto frontiers for example 3

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Fig. 14

Pareto frontiers for example 4

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