高大空间水喷淋灭火试验

Sprinkler Fire Suppression Experiments in Large Space

针对高大空间自动喷水灭火系统的灭火有效性问题,在喷头安装高度为9 m和12 m 2种高度下进行不同喷水强度的灭火试验。结果表明,喷淋喷水强度从5~11 L/(min·m^2)均能扑灭木垛火,但从灭火时间及耗水量角度出发,喷淋喷水强度从8 L/(min·m^2)增加到11 L/(min·m^2),灭火时间及耗水量略微减少,而喷水强度为5 L/(min·m^2)时,对应的灭火时间及耗水量较前两者大很多。建议在净空高度不超过12m的高大空间安装自动喷水灭火系统时,其喷水强度应由标准规范的不低于5 L/(min·m^2)适当增加。

In order to study the effectiveness of sprinkler fire suppression in large space, six fire tests were conducted at 9 m or 12 m with different discharge density of 5 ~ 11 L/minom^2. The results showed that the fire can be extinguished for each ex- periment. But from the perspective of the fire extinguished time and the water consumption, the value is larger for 5 L/minom^2 discharge density than that of 8 L/minom^2 and 11 L/minom^2 discharge density. The fire extinguished time and the water con- sumption decrease slightly with the increase of discharge density from 8 L/minom^2 to 11 L/minom^2. So it is suggested that the discharge density can be increased properly from 5 L/minom^2 in larger space with sprinkler.