Physiological comfort evaluation under different airflow directions in a heating environment

• DOI: 10.1186/s40101-022-00289-x
• Publication Date: 2022-04-15T06:02:41Z
• Authors: Kaori Tamura; Sayaka Matsumoto; Yu Hsuan Tseng; Takayuki Kobayashi; Jun’ichi Miwa; Ken’ichi Miyazawa; Soichiro Matsumoto; Seiji Hiramatsu; Hiroyuki Otake; Tsuyoshi Okamoto
• Keywords: Comfort evaluation; Respiration; GN49-298; Temperature; Electroencephalography; Airflow direction; Physical anthropology. Somatology; Heating; Electroencephalogram; 03 medical and health sciences; 0302 clinical medicine; Respiratory Physiological Phenomena; Humans; Original Article; Heating environment; Skin Temperature

Abstract Background Indoor airflow and thermal comfort are difficult to assess through subjective evaluations because sensations can differ based on various factors, such as personal characteristics, interests, preferences, the current state of mind. Thus, should be combined with objective assessments, physiological measurements. This study evaluated measurements, including skin temperature, electroencephalography, respiration, electrocardiography, in addition evaluations. Methods Twenty participants entered a test room at 30 °C after staying an acclimation 18 for 20 min. They were exposed indirect direct toward their faces performed four tasks under each condition: resting, counting 10 s following time alerts, mind, mental calculation. The mean speed air directed participants’ was 0.123 m/s 0.225 conditions, respectively. Results gamma beta bands electroencephalograms taken left-temporal (T3) left-parietal (P7) sites showed significantly lower amplitudes condition (gamma, T3: p = 0.034, P7: 0.030; beta, 0.051, 0.028). Similarly, variability respiration ( < 0.010). waves significant correlations anxiousness levels r 0.41; 0.35). Conclusions Our results suggest that heating causes stress fatigue than those induced by flow, which is equivalent more comfort. this measurements used evaluation unconscious indoor comfort, cannot detected alone.