School of Energy Science and Engineering, Central South University, Changsha, China.
School of Architecture and Art, Central South University, Changsha, China.
Indoor Air. 2022 Oct;32(10):e13138. doi: 10.1111/ina.13138.
Facial skin temperature has been applied to evaluate thermal comfort in a few studies, but the related theoretical basis is not sufficient. We conducted a climate-controlled experiment in winter. The air temperatures were 12, 15, 18, 21, and 24°C, and the relative humidity was set to 60%. During exposure (140 min), the subjects were in a sedentary state, and their thermal sensation, comfort, and acceptability of perceived thermal environments were documented many times. iButton instruments were used to continuously and automatically record skin temperatures on the forehead, nose, right ear, right cheek, left cheek, left ear, and chin. The measurement accuracy of the corrected skin temperature was within 0.1°C after calibrating each i-Button. The experimental results showed that the skin temperatures at different measurement points varied significantly. The forehead skin temperature was the highest, whereas the nose, being the facial part, exhibited the lowest skin temperature (except 24°C). The uneven degree of the skin temperature distribution increased as air temperature decreased. Correlation analysis confirmed that the facial skin temperature can be used to evaluate thermal sensation. Nose skin temperature and the average skin temperature of the forehead, nose, and chin are the most suitable indicators of thermal sensation. The correlation between facial skin temperature and the thermal sensation was significantly higher after 15 min of exposure time than that during 0-15 min. This study provides a theoretical basis for using facial skin temperature to dynamically monitor thermal sensations.
面部皮肤温度已被应用于评估少数研究中的热舒适度，但相关理论基础还不够充分。我们在冬季进行了一项空调控制实验。空气温度分别为 12、15、18、21 和 24°C，相对湿度设定为 60%。在暴露期间（140 分钟），受试者处于静止状态，多次记录他们的热感觉、舒适度和对感知热环境的可接受性。iButton 仪器用于连续自动记录额、鼻、右耳、右脸颊、左脸颊、左耳和下巴的皮肤温度。在对每个 i-Button 进行校准后，校正后皮肤温度的测量精度在 0.1°C 以内。实验结果表明，不同测量点的皮肤温度差异显著。额部皮肤温度最高，而作为面部的鼻部皮肤温度最低（24°C 除外）。随着空气温度的降低，皮肤温度分布的不均匀程度增加。相关分析证实，面部皮肤温度可用于评估热感觉。鼻皮肤温度和额头、鼻子和下巴的平均皮肤温度是热感觉的最佳指标。暴露 15 分钟后，面部皮肤温度与热感觉之间的相关性明显高于 0-15 分钟期间的相关性。本研究为使用面部皮肤温度动态监测热感觉提供了理论依据。
