Understanding mechanism of transmitted and stored heat in porous materials was extremely important for improving thermal protective performance of clothing. A coupled heat and moisture transfer model in a three-layer fabric system while exposing to a low-level thermal radiation was developed in this study. The model simulated the transmitted and stored heat in porous materials, and considered the effect of moisture transport on the transmitted and stored heat. The predicted results from the coupled model were validated with the experimental results, and compared with the predicted results from the previous model without considering the moisture effect. It was found that the prediction accuracies in skin burn and skin temperature through the coupled model were further improved. The coupled model was used to examine the moisture effect on heat transport and storage in porous materials. The results demonstrated that the moisture within porous materials increased the heat storage and discharge, but decreased the heat transport. The increases in initial moisture content and fiber moisture regain, while increasing the thermal hazardous effect, greatly enhanced the thermal protective performance of clothing. Therefore, it suggested that the moisture management in porous materials was a key consideration for thermal functional design of fabric.

中文翻译：

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暴露于热辐射的多孔材料中热湿传输模拟的耦合模型

了解多孔材料中传递和储存热量的机制对于提高服装的热防护性能极为重要。本研究开发了暴露于低水平热辐射的三层织物系统中的耦合热湿传递模型。该模型模拟了多孔材料中传递和储存的热量，并考虑了水分输送对传递和储存热量的影响。耦合模型的预测结果与实验结果进行了验证，并与不考虑水分效应的先前模型的预测结果进行了比较。发现通过耦合模型进一步提高了皮肤烧伤和皮肤温度的预测精度。耦合模型用于检查水分对多孔材料中传热和储存的影响。结果表明，多孔材料中的水分增加了热量的储存和排放，但降低了传热。初始含水量和纤维回潮率的增加，在增加热危害效应的同时，大大增强了服装的热防护性能。因此，这表明多孔材料中的水分管理是织物热功能设计的关键考虑因素。在增加热危害作用的同时，大大增强了服装的热防护性能。因此，这表明多孔材料中的水分管理是织物热功能设计的关键考虑因素。在增加热危害作用的同时，大大增强了服装的热防护性能。因此，这表明多孔材料中的水分管理是织物热功能设计的关键考虑因素。