Evaluation model of individual thermal comfort based on mean skin temperature

The local skin temperatures of 22 subjects at air temperatures of 21,24,26,29 ℃ are measured,and the mean skin temperatures are calculated by ten skin temperature measuring points.The thermal comfort levels and the thermal sensations of these subjects are also investigated by a questionnaire.The Mahalanobis distance discrimination method is applied to establish the evaluation model for the thermal comfort based on the mean skin temperature.The experimental results indicate that the difference of the mean skin temperatures between the comfort level and the discomfort level is significant.Using the evaluation model,the mean skin temperature at the thermal comfort level is 32.6 to 33.7 ℃,and the thermal comfort levels of 72% of the subjects are correctly evaluated.The accuracy of the evaluation model can be improved when the effects of sex of the subject on the mean skin temperature and the thermal comfort are considered.It can be concluded that the mean skin temperature can be used as an effective physiological indicator to evaluate human thermal comfort in a steady thermal environment.

面料性能对防静电无尘服热湿舒适性的影响

本文主要探索了面料性能对防静电无尘服热湿舒适性的影响。选择了两种常用的防静电无尘服面料,对其组织结构、厚度、经纬密度、透气性、透湿性进行测试。将这两种面料制成防静电无尘服,进行真人着装实验。实验是模拟工人的活动,先静坐30min,然后是30min的低速行走,最后又休息30min,在这个过程中测量了上臂、前胸、大腿、小腿的皮肤表面温度和前胸的湿度。实验在恒温恒湿气候室内进行,温湿度分别为22±1℃,55±5%RH。结果表明密度小、透气性好的面料制作的服装平均皮肤温度以及湿度变化都比较小,在轻度劳动下服装微气候的环境比较稳定。