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Burning behavior of cable tray located on a wall with different cable arrangements

机译：位于具有不同电缆布置的墙壁上的电缆桥架的燃烧行为

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摘要

Cable fire risk analysis is important for fire protection design in nuclear power plants, where multiple horizontal cable trays are mostly located on the walls. Fire experiments using three cable trays with different cable arrangements were conducted in a confined room to investigate the burning behavior of a cable tray on a wall. A corner was formed by the side wall and the cable tray. Hot smoke emitted from the burning cable was trapped in the corner and then ignited the cable on the bottom surface of the upper cable tray. It is found that for cables densely packed together, spread of flame on the bottom surface of cable tray was clearly observed and increased the mass loss of cable burning during the growth stage of a cable tray fire. For cables arranged further apart, vertical propagation from the bottom tray to the top tray was fast and dominated the mass loss of cable burning.
机译：电缆着火风险分析对于核电站的防火设计非常重要，在核电站中，壁上通常有多个水平电缆桥架。在密闭的房间内使用三个带有不同电缆布置的电缆桥架进行了防火实验，以研究电缆桥架在墙壁上的燃烧行为。侧壁和电缆桥架形成一个角。从燃烧的电缆散发出来的热烟被困在角落，然后点燃上电缆桥架底面上的电缆。结果发现，对于紧密堆积在一起的电缆，可以清楚地观察到火焰在电缆桥架底面上的蔓延，并在电缆桥架着火的生长阶段增加了电缆燃烧的质量损失。对于距离较远的电缆，从底部托盘到顶部托盘的垂直传播速度很快，并且主导了电缆燃烧的质量损失。

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