(0:12 m=s) and another opening at the top right from which the air heated by the human occupant is vented as shown in Fig. 7. In this study, there is a single occupant, and the three postures of standing, sitting and sleeping1 are examined in order to evaluate inhalation features according to posture as is shown in Table 2. The standing posture represents an occupant working at the center of an o?ce and facing the air supply opening (Fig. 7(1)). The sleeping posture represents a human occupant lying on its back in the center of the room. To avoid direct in8uence of supply air 8ow on the region of inhalation, the feet of the occupant are facing the supply opening (Fig. 7(2)). Although breathing is an irregular phenomenon, it was assumed to be steady for the purposeofthestudy,becausetheamountofairexhaledfrom the mouth is too small to in8uence the indoor air 8ow.2
1 The body shape in the sleeping model is basically the same as that for standing except that the body surface in contact with the 8oor is 8at. Some modeling was applied to make the volume of the body the same as that when standing. 2 In this study, the breathing phenomenon was assumed to be steady inhalation. This assumption was considered appropriate in line with the following results. We measured the velocity distribution in the region of air inhalation for a thermal mannequin with a PIV anemometer and con4rmed that the 8ow structure in the region of air inhalation was little a&ected by irregular breathing.