Abstract

Microencapsulated phase change materials (MPCMs) are increasingly seen as an adequate tool for heat management. The addition of a MPCM layer into a typical firefighters’ protective clothing can be used to mitigate burn injuries, increasing the time to second degree burns. A numerical approach is introduced to simulate the heat transfer in multilayer fabrics with MPCM. An overview of temperature field and total heat flux distribution for the multilayer fabric system with and without the MPCM is presented. Additionally, the effects of MPCM mass fraction, latent heat, specific heat and thickness are investigated to assess the thermal protective performance. The results demonstrate that the addition of a MPCM layer into the multilayer fabric assembly can be used to decrease the temperature obtained at the comfort liner boundary. Effect of heat intensity and radiation distance between the fabric system and heating source is also analyzed and discussed. The findings obtained in this study can provide some useful information on the beneficial design of clothing containing MPCMs.

摘要

微囊化相变材料（MPCM）日益被视为热量管理的适当工具。在典型的消防员防护服中增加MPCM层可用于减轻烧伤，从而增加了二级烧伤的时间。引入了一种数值方法来模拟带有MPCM的多层织物中的传热。概述了带或不带MPCM的多层织物系统的温度场和总热通量分布。此外，还研究了MPCM质量分数，潜热，比热和厚度的影响，以评估热防护性能。结果表明，在多层织物组件中添加MPCM层可用于降低在舒适衬里边界处获得的温度。还分析和讨论了热强度和织物系统与热源之间的辐射距离的影响。这项研究中获得的发现可以为含有MPCM的衣服的有益设计提供一些有用的信息。