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Experimental and numerical investigation of an airflow management system in data center with lower-side terminal baffles for servers

机译：用于服务器的下侧端子挡板的数据中心气流管理系统的实验和数值研究

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摘要

A recent research showed that data centers consumed about 1.3% of total worldwide electricity. Thus, energy conservation in data centers should be paid enough attention to. The impacts of server lower-side terminal baffles (SLTBs) on the thermal environment in data center are optimized by experiments and simulations. In this paper, three different sizes (4 cm x 46 cm, 8 cm x 46 cm and 12 cm x 46 cm) of baffles with six different baffle angles (0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees and 75 degrees) are applied to investigate the optimum airflow distribution. The simulation model was validated by on-site experiments, while the experimental results are in good agreement with numerical results. The measurements show that the use of 45 degrees angle and 8 cm x 46 cm SLTBs can effectively eliminate the heat accumulation and improve the airflow distribution and cooling efficiency in data center. In addition, it can decrease the temperature of the rack hotspot 1.9-2.5K, that reduces significantly the risk of local hotspot and avoid catastrophic damages to the servers. Furthermore, the exhaust air temperature distribution of the upper and lower parts of rack was quite uniform and by using the optimal baffles, the maximum temperature difference reduced from 2.2K to 0.5K.
机译：最近的一项研究表明，数据中心在全球全球电力中消耗了约1.3％。因此，应足够重视数据中心的节能。通过实验和仿真优化了服务器下端端子挡板（SLTB）对数据中心热环境的影响。在本文中，三种不同的尺寸（4厘米x 46cm，8cm x 46cm，12cm x 46cm，12cm×46cm），围裙六个不同的挡板角度（0度，15度，30度，45度，60度和75应用程度以研究最佳气流分布。通过现场实验验证了仿真模型，而实验结果与数值效果吻合良好。测量结果表明，使用45度角和8cm×46cm的SLTB可以有效地消除热量积聚并提高数据中心的气流分布和冷却效率。此外，它还可以降低机架热点1.9-2.5k的温度，这显着降低了本地热点的风险，并避免对服务器的灾难性损坏。此外，齿条的上部和下部的排气温度分布非常均匀，并且通过使用最佳挡板，最高温差从2.2k降低到0.5k。

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  • 来源
    《Building and Environment》 |2019年第5期|308-319|共12页
  • 作者

    Yuan Xiaolei; Zhou Xuetao; Liu Jinxiang; Wang Yu; kosonen Risto; Xu Xinjie;

  • 作者单位

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China|Aalto Univ Sch Engn Dept Mech Engn POB 14400 FI-00076 Aalto Finland;

    Nanjing Tech Univ Coll Urban Construct Dept HVAC POB 76 Nanjing 210009 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Data centers; Airflow distribution; Server lower-side terminal baffles; Local hotspot; Cooling efficiency;

    机译：数据中心;气流分布;服务器下侧端子挡板;局部热点;冷却效率;

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