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RESEARCH PAPERS

Thermal Performance Metrics for Arranging Forced Air Cooled Servers in a Data Processing Cabinet

[+] Author and Article Information
Jeffrey Rambo

G.W. Woodruff School of Mechanical Engineering,  Georgia Institute of Technology, Atlanta, GA 30332jeffrey.rambo@me.gatech.edu

Yogendra Joshi

G.W. Woodruff School of Mechanical Engineering,  Georgia Institute of Technology, Atlanta, GA 30332yogendra.joshi@me.gatech.edu

J. Electron. Packag 127(4), 452-459 (Feb 11, 2005) (8 pages) doi:10.1115/1.2056575 History: Received September 20, 2004; Revised February 11, 2005

The optimal arrangement of various components in a standard data processing cabinet layout is investigated through computational fluid dynamics and heat transfer. Relevant heat transfer performance of candidate designs is measured by newly proposed metrics for systems level electronics cooling. The results are then extended to define a favorable power dissipation profile, the most favorable of which was found to be one where the power dissipation increases in the vertical direction.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Rack airflow patterns

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Figure 2

Rack configurations 1–6

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Figure 3

Geometry of rack model (all dimensions in meters) showing (a, b) equipment location, (c) top exhaust fan, and (d) bottom opening

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Figure 4

1U server model with dominant airflow paths shown, all dimensions in (m)

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Figure 5

Blade server model with dominant airflow paths shown, same legend as Fig. 5

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Figure 6

Y mid-plane velocity vector map for rack configuration 1, (a) top 2 blade servers with 1U servers in between and (b) middle blade server with 1U servers on the top and bottom, with only every third vector shown

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Figure 7

Y mid-plane velocity vector map for rack configuration 3, (a) top 2 blade servers and (b) bottom blade server with 12-1U servers below, with only every third vector shown

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Figure 8

Y mid-plane velocity vector map for rack configuration 6, (a) top 2 blade servers with 2-1U servers in between and (b) bottom blade server with 8-1U servers below, with only every third vector shown

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Figure 9

Velocity vector map of vertical mid-plane of 1U server from (a) topmost server of configuration 2 and (b) bottommost server of configuration 3

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Figure 10

Power profile sketches, (a) upward, (b) downward, (c) concave, (d) convex, (e) half parabola, (f) full parabola, (g) hyperbolic tangent, and (h) uniform

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