A thermal comfort study on displacement ventilation in the tropics

Yu W.J., Cheong K.W, Kosonen R., Xie Y.H, Leow H.C.
thermal comfort, displacement ventilation, environmental chamber, hot climate
Year:
2003
Bibliographic info:
Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 2, pp 42-47, 2 Fig., 3 Tab., 6 Ref.

This paper presents the performance of a displacement ventilation system in a thermalchamber with tropical subjects. The chamber is served by an Air-Conditioning andMechanical Ventilation (ACMV) system in either Mixing or Displacement Ventilation modes.In the experiments, tropical subjects were surveyed with respect to their thermal sensationsunder different room conditions in either displacement ventilation or mixing ventilation.Objective measurements such as room air temperature, air velocity and relative humidity weremeasured at different heights in the chamber. The results show that the room neutraltemperature for a displacement ventilation system is higher than the conventional mixingventilation system. Subjects in the tropics can accept supply air temperature as low as 16.2Cand relative humidity as high as 77% with room temperature of 23C.

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