Improving ducting to increase cooling performance of high-end web servers subjected to significant thermal shadowing – an experimental and computational study
Improving ducting to increase cooling performance of high-end web servers subjected to significant thermal shadowing – an experimental and computational study
复制标题
改进管道以提高遭受严重热阴影的高端网络服务器的冷却性能 - 一项实验和计算研究
DOI：
10.1109/semi-therm.2015.7100180
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
V. Mulay
中科院分区：
文献类型：
--
作者：
Divya Mani;J. Fernandes;R. Eiland;D. Agonafer;V. Mulay
实施机架安装服务器空气冷却的一个关键要求是气流管理，以确保所有组件，尤其是 CPU 等关键设备，根据要求获得足够的气流。此外，底盘内的组件位置对于气流通道起着至关重要的作用，并影响整个系统的阻力。在本文中，机箱管道的显着改进旨在抵消双插槽开放计算网络服务器中热阴影的影响，其中一个 CPU 位于另一个 CPU 的直接下游。部署经过实验校准的详细服务器 CFD 模型来参数化管道的设计和位置，目的是了解气流旁路对 CPU 芯片温度和风扇功耗的影响。通过构建改进机箱的原型对所实现的增强功能进行了实验测试，报告显示风扇功耗节省了 23.4-39.6%，风扇速度降低了 21.6-26%，服务器所需的流量节省了 31.3-37.3%。服务器风扇引起的噪音水平也降低了 6.4% 至 16.7%。
A critical requirement in implementation of air cooling for rack mount servers is management of airflow to ensure that all components, especially critical devices such as CPUs, receive adequate flow as per requirement. In addition, component locations within the chassis play a vital role in passage of airflow and affect the overall system resistance. In this paper, sizeable improvement in chassis ducting is targeted to counteract effects of thermal shadowing in a dual-socket Open Compute web server wherein a CPU is located directly downstream from another. An experimentally-calibrated detailed CFD model of the server is deployed to parameterize design and location of the duct with the objective of understanding the effect of flow bypass on CPU die temperatures and fan power consumption. Enhancements achieved are tested experimentally by constructing a prototype of the improved chassis and reported with 23.4-39.6% savings in fan power consumption, 21.6-26% reduction in fan speeds, and 31.3-37.3% savings in flow rate required by the server. 6.4% to 16.7% reduction in acoustics noise levels caused by server fans is also presented.