Experimentally Validated Numerical Model of a Fully-Enclosed Hybrid Cooled Server Cabinet
Experimentally Validated Numerical Model of a Fully-Enclosed Hybrid Cooled Server Cabinet
复制标题
经过实验验证的全封闭混合冷却服务器机柜数值模型
DOI：
10.1115/ipack2015-48244
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发表时间：
2015
影响因子：
1.6
通讯作者：
M. Seymour
中科院分区：
文献类型：
--
作者：
K. Nemati;H. Alissa;B. Murray;B. Sammakia;M. Seymour
由于数据中心数量的快速增长以及IT和电信设备中的高密度散热，数据中心的节能热管理已成为电子封装界的重点研究热点。传统的传统数据中心仍然很大程度上依赖于通过高架地板静压室的穿孔瓷砖输送到 IT 设备机架的冷气流。当给定通道中的机架散热量存在较大差异时，标准空气冷却方法需要过度配置。当相邻机架的散热量存在较大差异时，局部混合空气-水冷却是更有效地控制冷却的一种方法。在封闭式空气-水冷混合服务器机柜中，产生的热量通过独立系统消除，该系统不与房间级空气冷却系统相互作用。在本研究中，描述了在紧耦合混合冷却封闭柜中进行 CFD 验证的综合程序。在早期的研究中，商业围护结构已通过实验进行了表征，其中有效性值被用作紧凑型热交换器模型的边界条件。在这里，先前获得的实验数据用于验证计算模型的结果。比较了不同空气流量的两种情况。达到了非常好的一致性，最大总体平均误差小于 4%。由于柜内压力相对较高，柜内漏气可能是模型与实验结果之间存在差异的原因。对经过验证的模型进行了敏感性研究，以调查泄漏对机柜性能的影响。版权所有 © 2015 ASME
Because of the rapid growth in the number of data centers combined with the high density heat dissipation in the IT and telecommunications equipment, energy efficient thermal management of data centers has become a key research focus in the electronics packaging community. Traditional legacy data centers still rely largely on chilled air flow delivered to the IT equipment racks through perforated tiles from the raised floor plenum. When there is large variation in the amount of heat dissipated by the racks in a given aisle, the standard air cooling approach requires over-provisioning.Localized hybrid air-water cooling is one approach to more effectively control the cooling when there is wide variation in the amount of dissipation in neighboring racks. In a closed hybrid air-water cooled server cabinet, the generated heat is removed by a self-contained system that does not interact with the room level air cooling system. In this study, a comprehensive procedure for CFD validation in a close coupled hybrid cooled enclosed cabinet is described. The commercial enclosure has been characterized experimentally in an earlier study, where the effectiveness values were applied as boundary conditions to the compact heat exchanger model.Here, the previously obtained experimental data are used to validate the results from computational modeling. Two cases with different air flow rates are compared. Very good agreement is achieved, with the maximum overall average error less than 4%. Due to relatively high pressure inside the cabinet, it is possible that air leakage from the cabinet may be responsible for the discrepancy between the model and experimental results. A sensitivity study was applied to the validated model to investigate the effect leakage had on the cabinet’s performance.Copyright © 2015 by ASME