The influence of continuous time of the direction of the fluctuating airflow of the front and back on thermal comfort

Abstract

The purpose of this study is to investigate the influence of the direction and continuous time of airflow on thermal comfort. Ten collegiate female subjects were exposed to airflow in twenty types. Air velocity of fluctuating airflow counted for 0〜0.8m/s (mean 0.3m/s) and air velocity of uniform airflow for 0.3m/s. Air temperature was kept constant at 28℃. Relative humidity was kept constant at 50%. Two fans were located before and behind the sedentary subjects. The subjects were measured for the skin temperatures, and they were asked about thermal sensation, thermal comfort and evaluation of airflow. The skin temperatures fell at many parts which were exposed to airflow, and there is statistically some significant differences. The dispersion of general thermal sensation votes was small. The most numerous reports in general thermal sensation were "0:neutral" at any condition. The airflow which blew longer from before than behind obtained higher comfort sensation vote.