Thermal comfort sensation by local airflow of different temperatures and velocities comparison of summer and winter experiments

In air-conditioning in a hot climate, it is more economical to supply air of higher temperature with higher velocity than the conventional practice. To realize this, a location shall be identified on a body surface, where comfort is attained effectively by the airflow. The present study examined if there exists any difference in the stimulation by local airflow between the back of the neck and ankle of a human subject by directing local airflow with different temperatures and velocities. The results of summer and winter experiments were compared. The results indicated that in summer seasons the necks and ankles felt more comfortably for decreasing temperature. The rise in temperature increased thermal comfort at both locations in winter seasons. In summer seasons, the necks felt more comfortably for the fast airflows; while the ankles were more comfortable for the slow airflows. In winter seasons, the necks and ankles were more comfortable in decreasing of airflows. The percentage of dissatisfied at the necks were smaller than the ankles for both seasons.