Research on the Ratio between the Convection and Radiation Heat Exchange Amount of the Face and Head of Manikin in the Thermal Comfort Condition

In this paper, the radiation heat exchange coefficient of exposed parts human body is firstly obtained through pre-experiment, which used to separate total output amount manikin. Then manikin under different airflow organizations personal ventilation, mixed ventilation and seat are respectively studied. The value convection face head compared. And variable conditions studied for air temperatures volumes. It concluded that when supply temperature changes between 22? 30°C with thermally comfortable, from 38 W/m 2 137 , range 26 67 . 6 110 ratio 0.5 6.7.