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Research Papers

Comparison Between Numerical and Experimental Results of Airflow Distribution in Diffuser Based Data Center

[+] Author and Article Information
Qifei Jian

School of Mechanical and Automobile Engineering,  South China University of Technology, Guangzhou 510640,Guangdong, Chinatcjqf@scut.edu.cn

Qiaoli Wang

School of Mechanical and Automobile Engineering,  South China University of Technology, Guangzhou 510640,Guangdong, Chinaqiaoli5891@sina.com

Haoting Wang1

School of Mechanical and Automobile Engineering,  South China University of Technology, Guangzhou 510640,Guangdong, ChinaJWHW2011@163.com

Zheng Zuo

School of Mechanical and Automobile Engineering,  South China University of Technology, Guangzhou 510640,Guangdong, Chinazuozheng@scut.edu.cn

1

Corresponding author.

J. Electron. Packag 134(1), 011006 (Mar 19, 2012) (9 pages) doi:10.1115/1.4005912 History: Received March 08, 2011; Revised December 16, 2011; Published March 07, 2012; Online March 19, 2012

This paper studies the flow and temperature patterns in an overhead diffuser based data center. In-situ measurements of the data center were carried out to validate a mathematic model for predicting the effect of different air distribution systems. With the measured data of temperatures and airflow velocities, the mathematic model is constructed using a commercial Computational Fluid Dynamics (CFD) software and experimental data to present a comparison between test results and numerical simulations. The area of the data center is 311 square meters and the heat load of the equipment is 320~360 watt per square meter. In-situ temperatures and humidity of the data center were measured with an Automatic Temperature and Humidity measuring instrument, whose error is ±0.5 °C. The discrepancy of the temperature and velocity between the numerical and experimental results were within ±2.3 °C and ±1.8 m/s, respectively. In addition, analysis shows that changing the volume flow rate of the cold air delivered to some diffusers can optimize the temperature field and thereby save the energy.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Air outlet measurement points

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Figure 2

Branch ducts parameters in data center: (a) average velocity and (b) average temperature

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Figure 3

Schematic of the measurement points

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Figure 4

Return air outlet measurement points

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Figure 5

Layout of the data center

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Figure 6

Power consumption in data center

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Figure 7

Perspective view of the data center

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Figure 8

Velocity contours of I–IX branch ducts

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Figure 9

Vector plots at planes z  =  0.3 m, 1 m, and 2 m

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Figure 10

Numerical and experimental comparison of rack front velocity at different planes

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Figure 11

Temperature contours at planes z  =  0.3 m, 1 m, and 2 m

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