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Research Papers

Numerical Modeling of Perforated Tile Flow Distribution in a Raised-Floor Data Center

[+] Author and Article Information
Emad Samadiani

Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30340samadiani@gatech.edu

Jeffrey Rambo

Westhollow Technology Center, Shell Global Solutions (U.S.), Inc., P.O. Box 4327, Houston, TX 77210jeff.rambo@shell.com

Yogendra Joshi

Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30340yogendra.joshi@me.gatech.edu

J. Electron. Packag 132(2), 021002 (May 20, 2010) (8 pages) doi:10.1115/1.4001589 History: Received April 21, 2009; Revised February 17, 2010; Published May 20, 2010; Online May 20, 2010

This paper is centered on quantifying the effect of computer room and computer room air conditioning (CRAC) unit modeling on the perforated tile flow distribution in a representative raised-floor data center. Also, this study quantifies the effect of plenum pipes and perforated tile porosity on the operating points of the CRAC blowers, total CRAC air flow rate, and its distribution. It is concluded that modeling the computer room, the CRAC units, and/or the plenum pipes could make an average change of up to 17% in the tile flow rates with a maximum of up to 135% for the facility with 56% open tiles while the average and maximum changes for the facility with 25% open tiles are 6% and 60%, respectively.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Specification curve of a typical CRAC blower

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Figure 2

Data center laboratory: (a) floor plan and (b) plenum cross section with obstruction vertical location

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Figure 5

Model (e): plenum with pipes and center

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Figure 6

The numerical and experimental tile flow distribution in (a) row 5, (b) row 6, (c) row 12, and (d) row 13

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Figure 7

The pipe effect on tile flow distribution in (a) row 5, (b) row 6, (c) row 12, and (d) row 13

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Figure 8

Perforated tile porosity effect on tile flow distribution in (a) row 5, (b) row 6, (c) row 12, and (d) row 13

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Figure 3

Blockages in the plenum: (a) pipes and (b) stanchions

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Figure 4

Model (b): plenum with pipes

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