计算机数据中心液氮防灭火数值模拟

针对液氮喷淋在数据中心防灭火方面研究较少的现状，通过 FDS 对某数据中心进行火灾数值模拟，对比有无液氮灭火系统两种情况，机房内烟气蔓延、火焰控制、温度分布以及能见度等参数的变化规律。结果表明，液氮喷淋系统在控制火灾烟气蔓延方面有分散作用，可提高走道处的能见度；液氮汽化并快速分布到整个空间中，可在 500 s 内将着火点周围的温度降低到 50 ℃以下，对其他设备起到保护作用；与传统 CO 2 灭火相比，液氮灭火具有一定的优越性。

Numerical simulation of liquid nitrogen fireprevention in computer data center

Considering little understanding about liquid nitrogen spray in fire prevention of data center,fire numerical simulation of a data center was carried out by FDS software. The variations of smoke spread, flame control, temperature distribution, visibility and other parameters were analyzed by comparing the two conditions, i.e., whether the liquid nitrogen fire extinguishing system exists or not. The results show that the liquid nitrogen spraying system has dispersive effect on controlling the fire smoke spreading and can improve the visibility in the corridor. Liquid nitrogen is vaporized and distributed rapidly in the whole space, and the temperature around the ignition point can be lowered to below 50 ℃ within 500 s to protect other equipment.Compared with traditional CO 2 extinguishing agent, liquid nitrogen fire extinguishing system has certain advantages.