M&E operations
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Data center power, cooling, water and fire: power distribution, cooling, environment monitoring, fire safety and operations
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Basics
- Power distribution
UPS 冗余架构:N、N+1、分布式冗余、2N
- 按冗余程度从低到高:容量型(N)、隔离冗余、并联冗余(N+1)、分布式冗余(DR)、系统加系统(2N、2N+1)。
- N+1 是多台 UPS 并联分担负载并多配一台;2N 是两套完全独立的 UPS 系统各自能带全部负载,可靠性最高、成本也最高。
- 大型数据中心常用 2N 或分布式冗余:DR 用 3 套以上 UPS 交叉供电,以低于 2N 的成本实现可同时维护。
- Power distributionUnited States
柴油发电机月度带载测试:NFPA 110
- 柴油发电机组每月至少运行一次、不少于 30 分钟,负载不低于铭牌功率的 30%(或达到厂家规定的最低排气温度);暖机、冷机时间不计入。
- 每月达不到 30% 负载的,要每年做一次假负载测试:25% 负载 30 分钟、50% 负载 30 分钟、75% 负载 60 分钟。
- 国内机房一般参照厂家手册和运维规程执行,带载测试能及早发现湿堆积、燃油变质、启动电池老化等问题。
Technical articles
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