冷却装置嵌入式数据中心机柜供冷效果研究

Aiming at the problems such as high energy consumption and poor cooling effect that are普遍存在 in the cold supply link of the air conditioning system in the current data center, this paper proposes to embed the cooling device inside the cabinet to实现定量精确供冷 to the server. Using the CFD simulation platform that has been verified by experiments, the influence of the arrangement方式 and operating parameters of the cooling device on the cooling effect has been studied. The results show that when the cooling device is located in the middle of two rows of servers, the cooling effect is the best, and the temperature qualification coefficient is 100%. Compared with the initial structure where the cooling device is located under two rows of servers, the standard deviation and the uniformity coefficient have both decreased by 66.67%. After the rated air volume of the fan reaches 2,000 m³/h, the improvement of the cooling effect by increasing the rated air volume is明显减弱. In the range of 2,000 - 2,400 m³/h, the changes in the average temperature and the maximum temperature are both around 0.5 °C; when the rated air pressure of the fan is 250 Pa, the cooling effect of the cabinet is the best, and the standard deviation and the uniformity coefficient are the smallest, being 0.66 °C and 0.016 respectively; when the inlet air temperature rises from 25 °C to 29 °C, the overall temperature of the server increases, but the temperature uniformity is几乎不受影响, and the maximum change amplitudes of the standard deviation and the uniformity coefficient are only 0.05 °C and 0.002 respectively.

针对目前数据中心空调系统在冷量供应环节普遍存在的能耗大、冷却效果差等问题,本文提出将冷却装置嵌入机柜内部以实现对服务器的定量化精确供冷,利用已通过实验验证的CFD仿真平台,研究了冷却装置的排布方式和运行参数对供冷效果的影响。结果表明:当冷却装置位于两排服务器中间时冷却效果最好,温度合格系数为100%,相比于冷却装置位于两排服务器之下的初始结构,标准差和均匀系数均下降了66. 67%。在风机的额定风量达到2 000 m~3/h后,增大额定风量对冷却效果的提升明显减弱,在2 000~ 2 400 m~3/h范围内,平均温度和最高温度的变化量均在0. 5 ℃左右;当风机的额定风压为250 Pa时,机柜的冷却效果最好,标准差和均匀系数最小,分别为0. 66 ℃和0. 016;当进风温度由25 ℃升至29 ℃时,服务器整体温度提高,但温度均匀性几乎不受影响,标准差和均匀系数的变化幅度最大值分别仅为0. 05 ℃和0. 002。