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Airflow distribution through perforated tiles in raised-floor data centers

机译：通过活动地板数据中心中的多孔砖进行气流分配

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摘要

Raised-floor data centers are the most commonly used facilities for housing computer and telecommunication equipment. To adequately cool this equipment, the cooling air through perforated tiles must be distributed properly. The airflow distribution depends on the pressure distribution or the flow field in the space under the raised floor (plenum); it is a complex function of a large number of variables, including the size of the plenum, the open area of the perforated tiles, the locations and flow rates of the computer room air conditioner (CRAC) units, and the size and location of the under-floor obstructions like cables and pipes. In this article, the effect of these parameters on the airflow distribution is studied using an idealized one-dimensional computational model. Within the one-dimensional framework, the airflow distribution is governed by two dimensionless parameters: one related to the pressure variation in the plenum and the other to the frictional resistance. Results, in terms of distributions of pressure in the plenum and flow rates through the perforated tiles, are presented over a range of values of these two parameters. These results provide an understanding of the fundamental fluid mechanical processes controlling the airflow distribution through the perforated tiles. The one-dimensional model is used to calculate flow rates for two possible arrangements of the CRAC units, and these results are compared with those given by a three-dimensional model.
机译：高层数据中心是容纳计算机和电信设备的最常用设施。为了充分冷却该设备，必须正确分配通过多孔砖的冷却空气。气流分布取决于活动地板（气室）下方空间的压力分布或流场；它是由许多变量组成的复杂函数，其中包括气室的大小，打孔砖的开放区域，计算机机房空调（CRAC）单元的位置和流量，以及机房空调的大小和位置。地板下的障碍物，例如电缆和管道。在本文中，使用理想化的一维计算模型研究了这些参数对气流分布的影响。在一维框架内，气流分布受两个无因次参数控制：一个与气室中的压力变化有关，另一个与摩擦阻力有关。在这两个参数的取值范围内，显示了充气室中压力分布和通过多孔砖的流量的结果。这些结果提供了对控制穿过穿孔砖的气流分布的基本流体力学过程的理解。一维模型用于计算CRAC单元的两种可能布置的流速，并将这些结果与三维模型给出的结果进行比较。

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