DISTRIBUTION OF SKIN SURFACE TEMPERATURE OF A MANIKIN IN THE SPACE WITH DISPLACEMENT VENTILATION SYSTEM

摘要

The objective of this study is to investigate the distribution of different body parts' surface temperatures in the space served by displacement ventilation (DV) system. The experiment was conducted in a Field Environmental Chamber in the tropics. The manikin has a female body with 26 individually heated and controlled body segments.It was exposed to 3 levels of vertical air temperature gradients (nominally 1, 3 & 5 K/m) between 0.1 and 1.1 m heights and 3 room air temperatures of 20, 23 & 26°C with constant relative humidity of 50% at 0.6 m height.During the experiment, air velocity near the manikin was maintained at less than 0.2 m/s. The results show that room temperature has greater influence on overall and local thermal comfort than temperature gradient. The possibility of local thermal discomfort is much lower at whole-body thermally neutral state than at whole-body non-neutral state.