带有辐射冷却材料的背心可以改善户外工作者的热舒适度:一项实验研究
Yao Wang1, Bohao Zhao1, Hengxuan Zhu1
1School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
Nanomaterials (Basel, Switzerland)
|July 13, 2024
概括
带有辐射冷却涂层的新背心在高温下显著提高了户外热舒适度. 最佳的涂层厚度提高了性能,降低了表面温度,即使在更温暖的条件下也增加了舒适度.
科学领域:
- 热舒适度可以提供热舒适度.
- 材料科学是一种材料科学.
- 人类生理学 人类生理学
背景情况:
- 高环境温度对人类健康和舒适性构成风险.
- 个人冷却策略对于减轻热应激至关重要.
- 辐射冷却材料为热管理提供了被动的方法.
研究的目的:
- 调查带有辐射冷却涂层的背心的有效性,以提高户外高温环境中的人类热舒适度.
- 为了确定最佳的涂层厚度,以最大限度地提高辐射冷却性能.
- 评估辐射冷却背心在不同的环境条件下对热感和舒适度的影响.
主要方法:
- 辐射冷却涂层的性能是根据不同的涂层厚度进行评估的.
- 人体受试者 (n=6) 参加了评估热舒适度的受控实验.
- 试验对象经历了两个条件:穿着辐射冷却涂层背心和标准背心.
- 记录了背心表面的温度变化和主观的热舒适度 (TSV,TCV).
- 实验是在不同的环境温度下进行的,考虑到湿球球体温度 (WBGT).
主要成果:
- 对于辐射冷却背心,确定了160微米的最佳涂层厚度.
- 与标准背心相比,涂层背心的内外表面温度分别降低了5.54°C和4.37°C.
- 穿着辐射冷却背心显著改善了热舒适度,热感觉投票 (TSV) 的百分比从29.2%增加到66.7% (范围从0到1),WBGT为26°C.
- 平均热舒适度 (TCV) 在涂层背心上从-0.5增加到-0.2.
- 冷却背心对热舒适度的积极影响显示,随着湿球球体温度 (WBGT) 的增加,趋势下降.
结论:
- 结合辐射冷却涂层的背心在炎热的户外条件下有效提高人类的热舒适度.
- 优化的辐射冷却背心显示了个人热应激管理的巨大潜力.
- 辐射冷却背心的有效性在中等高温下最明显,在极热和潮湿的环境中可能会减弱.
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