The compositions, operating modes and system design key points of indirect dynamic free cooling system for data center are presented. Energy saving analysis about indirect dynamic free cooling system in two old small and medium data centers is carried out, and the actual operation of the system matches the expectation. The actual projects show that indirect dynamic free cooling system which is adopted in the Yangtze River basin and its north area has large energy saving effect. At last the application future of indirect dynamic free cooling system in retrofitting projects is prospected.%介绍了数据中心间接动态自然冷却空调系统的架构, 运行模式及其工程设计要点, 对两个老旧中小型数据中心空调改造项目进行了节能分析, 项目实际运行状况符合预期, 实例证明间接动态自然冷却空调系统在长江流域及其以北地区的数据中心改造中具有极大节能效果, 文章最后展望了该系统在改造数据中心中运用前景.
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