A new approach to demonstrate the exothermic behavior of textiles by using a thermal manikin: Correction methods of manikin model

In high humidity environments, certain textile fibers, such as wool, viscose, cotton, and polyester, demonstrate a tendency for exothermic heat generation. Utilizing a comprehensive thermal manikin model, this study sought to examine the intricate heat flux patterns across the manikin's torso post an 1800-s transition under fluctuating humidity levels, ranging from 35% to 80%. Initial findings highlighted a dichotomy: some segments exhibited a marked decrease in heat, subsequently recovering, whereas others showed a rapid escalation. Notably, to maintain a skin temperature of 35 degrees C on the manikin, there was a transient heat reduction in select segments, emphasizing the pivotal role textiles play in ensuring thermal comfort during transient conditions. The research incorporated two distinct data correction methodologies: the first calibrated heat flux measurements based on steady-state values pre and post humidity alteration, and the second drew upon a consistent reference segment, such as the head, which remained unaffected by the fabric. Intriguingly, these heat flux behaviors correlate directly with a fabric's moisture buffering capability, with wool emerging as the most adept, showcasing a buffering efficiency 26%, 45%, and 96% superior to viscose, cotton, and polyester, respectively. Furthermore, the microclimate-a critical layer between garment and skin-plays a determinant role, with wool's microclimate witnessing a sharp 58% surge when external humidity reached 80% after the stipulated transition period. This investigation highlights the unique thermal insulation properties of wool in varying humidity contexts, providing a strong basis for future scholarly investigations into the intricate thermal characteristics of textiles.

Automated summary

In high humidity environments, certain textile fibers exhibit exothermic heat generation tendencies. This study used a thermal manikin model to analyze the heat flux patterns across the manikin's torso under varying humidity levels. The research highlights the importance of textiles in ensuring thermal comfort, with wool demonstrating superior moisture buffering capabilities. The microclimate between the garment and skin also plays a significant role in heat flux behaviors.