• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Development of a sweating thermal skin simulant for heat transfer evaluation of clothed human body under radiant heat hazard
【24h】

Development of a sweating thermal skin simulant for heat transfer evaluation of clothed human body under radiant heat hazard

机译：辐射热危害下衣服体温传热评价的出汗热皮肤模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Human perspiration highly affects body heat dissipation as well as heat and mass transfer in clothing systems. Nevertheless, current skin simulant systems for assessing heat transfer under high heat exposures simply simulate the dry skin state. This fact limits the validity of such systems as perspiration and mass transfer exist during high heat exposure conditions. In this study, an active sweating skin simulant was developed using the polydimethylsiloxane material and with controllable sweat rates for heat transfer assessment under radiant heat hazards, considering mass transfer as well. In the dry state, the temperature and its variation rate of the skin simulant with water-filled sweating channels showed good agreement with the ISO standard numerical model. For sweating conditions, the results showed that the wet conduction facilitated heat transfer towards the skin by 5-8 % at the beginning of sweating. With continuous sweat release, the surface temperature rise was attenuated due to the additional heat capacity induced by additional moisture in the clothing-skin system. The low standard deviations, below 2 degrees C, and coefficients of variation, below 10%, for the temperature measurements under various sweat rates, indicated good reproducibility of the skin simulant. This research provides the first approach to consider active sweating in skin simulant systems under high heat exposures. This further provides new insights into heat transfer in protective clothing-human skin systems under extreme heat exposures, contributing to realistically evaluating the thermal protective performance of clothing materials under sweating conditions.
机译：人的汗水会高度影响身体散热以及服装系统中的热量和传质。然而，用于评估高热曝光下的热传递的当前皮肤模拟系统简单地模拟了干燥的皮肤状态。这一事实限制了这种系统的有效性，因为在高温暴露条件下存在汗水和传质。在该研究中，使用聚二甲基硅氧烷材料开发了活性出汗的皮肤模拟，并在辐射热危害下具有可控的汗液速率，用于考虑质量传递。在干燥状态下，皮肤模拟剂的温度及其变化率与充满水的出汗通道的良好与ISO标准数值模型吻合良好。对于出汗条件，结果表明，在出汗开始时，湿式传导促进了朝向皮肤的热传递5-8％。由于连续汗液释放，由于衣物皮肤系统中的额外水分诱导的额外热容量，表面温度升高被衰减。对于各种汗液速率的温度测量，低标准偏差，低于2摄氏度和变化系数，低于10％，表明皮肤模拟剂的良好再现性。本研究提供了在高热曝光下在皮肤模拟系统中考虑主动出汗的第一种方法。这进一步提供了新的热传递在极端热曝光下对防护服 - 人体皮肤系统的热传递，有助于实际评估衣服材料在出汗条件下的热保护性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号