火灾救生舱多层隔热材料降温效果试验研究

Study on cooling effects of insulation layers of life rescue capsule

为提升火灾救生舱舱体结构隔热层隔热性能,利用多层蛇形管路、硅酸铝纤维板等组成的多层气体隔热结构,搭建隔热性能高温测试平台,测试高温环境下添加铝箔前后各层的隔热效果;然后在不同内层温度下向隔热结构管路中分别通入低温二氧化碳气体和常温空气;最后探究2种气体对各层降温效果的影响。结果表明:在隔热结构中添加铝箔可以提高隔热效率,在加热温度为600℃时效果最好,隔热效率提高了39. 3%,温度继续升高,隔热效率逐渐下降;气体降温效果取决于气体与隔热层温差,温差越大降温效果越明显,低温气体降温效果优于常温气体。

In order to improve thermal insulation performance of heat-protective layers of fire rescue capsule structure,a high temperature test platform for insulation performance was built based on multilayer gas insulated construction with multi-layer serpentine pipelines and aluminum silicate fiberboards to test thermal insulation effect of each layer before and after adding aluminum foil in high temperature environment.Then,low temperature carbon dioxide gas and normal temperature air were injected into thermal insulation pipelines at different inner temperature.At last,influences of the two gases on cooling effects of each layer were explored.The results show that adding aluminum foil in insulation structure can improve thermal insulation efficiency,and it will be most effective when heating temperature reaches 600℃with an increase of 39.3%for insulation efficiency which will gradually decrease as temperature continues to rise.Cooling effects of gases depend on temperature difference between the gas and insulation layers,the greater temperature difference is,the more obvious cooling effects are,and low temperature gas works better than normal temperature gas.