摘要
水下数据中心是海洋战略中重要的信息处理枢纽.针对水下数据中心高热密度散热和高能效需求,开发一种完全利用自然冷源、无主机低能耗的新型水冷背板系统,并通过搭建3.5∶1缩比试验平台进行了水下测试.结果表明,环境水温为25℃,负载为2.4 kW与3.6 kW时,水下数据中心服务器进/出风温度小于45 ℃/55℃,系统冷却效果良好.为了推导全尺寸工程样机实际环境下的工作性能,建立一维稳态换热模型.模拟结果表明:在功率为50～70 kW,水下环境温度为25 ℃时,系统能效评价指标PUE(power usage efficiency)低于1.075.分析新型水冷背板系统在不同海域的水下数据中心适用性,当系统服务器功率为70 kW、环境水温为5～25℃时,系统PUE为1.051～1.068.
Abstract
Underwater data centers are important information processing hubs in ocean strategy.A new type of water-cooled backboard system that fully utilized natural cooling sources and operates with no host and low energy consumption was developed to meet the high heat density and energy efficiency requirements of underwater data centers,and a 3.5∶1 scaled test platform was built for underwater testing.The results show that when the ambient water temperature is 25 ℃ and the load is 2.4 kW and 3.6 kW,the inlet/outlet air temperature of the underwater data center server is less than 45 ℃/55 ℃,and the cooling effect of the system is good.In order to deduce the operational performance of full-scale engineering prototypes in actual environments,a one-dimensional steady-state heat transfer model was established.The simulation results show that the system power usage efficiency(PUE)is below 1.075 when the power is 50～70 kW and the underwater ambient temperature is 25 ℃.The applicability of the new water-cooled backplate system in underwater data centers was analyzed in different sea areas.When the system server power is 70 kW and the ambient water temperature is 5～25 ℃,the system PUE is 1.051～1.068.
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