含水率对消防服用多层织物系统热蓄积的影响

为全面准确地评估湿态下消防服用多层织物系统的热防护性能,通过改进现有的热防护性能测试仪器,采用传统热防护性能实验与蓄积热实验2种方法,利用模拟人体皮肤传感器取代标准测试中的铜片热流传感器,基于Pennes热量传递方程,根据Henriques人体皮肤烧伤模型做出烧伤预测,并利用迭代法获得二度烧伤最少热暴露时间。分析了织物系统含水率对二度烧伤最少热暴露时间及热蓄积指数的影响。实验结果表明:2种实验方法测得的二度烧伤最少热暴露时间随含水率的增大明显降低,热蓄积指数也呈降低趋势;二度烧伤最少热暴露时间与含水率之间存在显著的线性负相关关系。

Influence of moisture content on heat storage performance of multilayer fabric assemblies for firefighters

In order to evaluate the influence of moisture content on thermal protective performance of fabric for firefighters, burning predication was proposed according to the Henriques human body skin burn model by using the modified existing thermal protective performance tester, adopting two kinds of method of conventional thermal protective performance test and thermal storage test, and utilizing the skin simulant sensor to replace the copper sheet sensor. The influence of the moisture content of the fabric assembly on second degree skin burn ( MET) and stored energy index ( SEI) were investigated. The results show that the MET obtained by these two methods reduces with the increase of the moisture content and the SEI also decreases. A negative correlation relationship exists between the moisture content and MET. Simple linear regression equations are developed between SET and the moisture content.