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      暖通空調>期刊目次>2023年>第7期

      基于熱環境評價指標的某高校機房氣流組織優化研究

      Optimization of air distribution in data center of a university based on thermal environment evaluation indexes

      李國輝[1] 段之殷[1][2] 胡然[1]
      [1]北京建筑大學 [2]供熱供燃氣通風及空調工程北京市重點實驗室

      摘要:

       以北京某高校數據機房為研究對象,采用經實驗驗證的CFD模型研究了封閉冷、熱通道和不同空調擺放位置對數據機房熱環境和氣流組織的影響,并基于多個熱環境評價指標對機房熱環境和氣流組織進行了定量分析。研究表明:封閉冷、熱通道均可有效改善機房內的速度場與溫度場,封閉熱通道時機房整體溫度比封閉冷通道低1.5~2.0 ℃;封閉冷、熱通道時,回風溫度指數RTI由110%左右降低到106%左右,兩者優化效果基本相同;封閉冷通道時供熱指數SHI由0.22降至0.10左右,而封閉熱通道后SHI降至0.08,優化效果優于封閉冷通道,但相比封閉冷通道SHI僅降低了0.02左右,綜合考慮,封閉冷通道為最合適的優化改造方案;封閉冷、熱通道后,運行空調1、2或空調2、3時,機房的整體環境最佳,運行空調1、3次之。

      關鍵詞:數據機房;氣流組織;熱環境評價指標;速度場;溫度場;封閉通道;空調擺放位置

      Abstract:

      Taking the data center of a university in Beijing as the research object, the experimentally verified CFD model is used to study the influences of closing the cold or hot aisle and different air conditioning locations on the thermal environment and air distribution of the data center. The thermal environment and air distribution of the data center are quantitatively analysed based on several thermal environment evaluation indexes. The research shows that closing the cold or hot aisle can effectively improve the velocity field and temperature field in the data center. The overall temperature of the data center when the hot aisle is closed is 1.5-2.0 ℃ lower than that when the cold aisle is closed. When the cold or hot aisle is closed, the return heat index (RHI) is reduced from about 110% to about 106%, and the optimization effects of the two ways are basically the same. The supply heat index (SHI) is reduced from 0.22 to about 0.10 when the cold aisle is closed, while the SHI is reduced to 0.08 when the hot aisle is closed and the optimization effect is better, but the SHI is only about 0.02 lower than that of closing the cold aisle. After comprehensive consideration, closing the cold aisle is the most suitable optimization scheme. After closing the cold or hot aisle, running the air conditioner NO.1 and 2 or NO.2 and 3 can achieve the best overall environment of the data center, while running NO.1 and 3 gets poor effect.

      Keywords:datacenter;airdistribution;thermalenvironmentevaluationindex;velocityfield;temperaturefield;closingaisle;airconditioninglocation

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