核电厂综合管廊内火灾探测器对比研究

摘要

搭建了某核电厂综合管廊中具有代表性电缆密集区的全尺寸模型,设定长边区域电缆火、长边区域油盘火、斜坡区域电缆火、交叉区域电缆火等不同的火灾工况,测试了点型感烟火灾探测器、线型感温电缆火灾探测器、分布式光纤火灾探测器和图像型火灾探测器对管廊内早期火灾的探测有效性.试验结果表明,感温电缆与分布式光纤对电缆桥架内的电缆火探测效果较好;图像型火灾探测器易受空间遮挡物的影响;点型感烟火灾探测器的可靠性好,但报警响应时间较长.%A full-scale modeling test of a pipe gallery cable concentrated areain a nuclear power plant was carried out in.The adaptability and effectiveness to the early fire of some popular detectors (point type smoke fire detector,cable type heat fire detector,distributed fiber optic detector,and graphic fire detector) were compared and analyzed under the different experimental fire conditions such as long side area cable fire,long side area oil pan fire,slope area cable fire,cross area cable fire.The experimental results showed that,cable type heat fire detector and distributed fiber optic detector had better effect for detecting cable fire;detecting effect of image detector might affected by occluded objects;response time of point type heat fire detector is long,while the alarm reliability is high.