Feasibility Study of Rear Door Heat Exchanger for a High Capacity Data Center
Feasibility Study of Rear Door Heat Exchanger for a High Capacity Data Center
复制标题
高容量数据中心后门热交换器的可行性研究
DOI：
10.1115/ipack2022-97494
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
D. Agonafer
中科院分区：
文献类型：
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作者：
Vibin Shalom Simon;Himanshu Modi;K. Sivaraju;P. Bansode;S. Saini;Pradeep Shahi;S. Karajgikar;V. Mulay;D. Agonafer
由于数据中心越来越多地使用高性能计算来满足巨大的工作负载，因此必须不断地用高性能计算服务器替换旧的低性能计算服务器。随着数据中心热足迹或机架密度的增加，传统的空气冷却系统不足以在最佳条件下提供和运行服务器，从而导致热节流。为了满足日益增长的需求，后门热交换器（RDHx）与外围机房空气处理/空调（CRAH/CRAC）装置一起部署在现有的数据中心中。RDHx从机架的后端传递热量，并将其排除到设备的冷冻水中。这项研究将证明RDHx在低密度和高密度机架应用中的适用性。基线CFD模型具有具有外围CRAH/CRAC单元和RDHx的通用数据中心布局。通过分别改变rack和RDHx的空气和液体入口温度，进行了几个案例研究。我们还比较了RDHx的主动和被动运行模式，同时服务器风扇根据IT入口温度提供流量。本文还将讨论设计一个只有RDHx而没有外围CRAC/CRAH单元的数据中心，同时保持热包络的可行性。该研究还将为基于热负荷和服务器设计的RDHx的实现提供指导。
Due to increased use of high-performance computing in datacenters to cater to huge workloads, old low-performance compute servers must be replaced endlessly with high-performance compute servers. Traditional air-cooling systems are insufficient to provision and run the servers in optimal conditions as the datacenter thermal footprint or rack density grows, resulting in thermal throttling. To sustain the growing needs, Rear Door Heat Exchangers (RDHx) are deployed in existing datacenters along with peripheral Computer Room Air Handling/Conditioning (CRAH/CRAC) units. RDHx transfers heat from the rear end of the racks and rejects it into the facility’s chilled water. This study will demonstrate the suitability of RDHx for low density as well as high density rack applications. A baseline CFD model had a generic datacenter layout with peripheral CRAH/CRAC units and RDHx. Several case studies were conducted by varying the air and liquid inlet temperatures for rack and RDHx, respectively. We also compared active and passive modes of operating RDHx while server fans provide flowrate based on the IT inlet temperature. The paper will also discuss the feasibility of designing a datacenter with only RDHx and no peripheral CRAC/CRAH units while maintaining the thermal envelop. The research will also provide a guideline in implementing RDHx based on the heat load and server design.