Measurements are performed at heights of 0.02 m to 0.26 m (0.8 in to 10.2 in) above the floor, in the vertical longitudinal plan through the center of the diffuser, in the vertical transversal plan at 2.16 m (8.5 ft) from the diffuser, and in the horizontal plane at 0.05 m (2 in) above the floor. In this experimental study, the air velocity and temperature fields produced by a wall-mounted DV air diffuser are measured in three perpendicular planes. In order to understand and prevent the local discomfort, complete assessment of the air velocity and temperature in the DV jet is required. Local discomfort such as draft or excessive temperature difference between head and ankle are common complaints associated with DV. Abstract : Displacement Ventilation (DV) is an air distribution method recognized to enhance indoor air quality, while having a potential for energy savings due to stratification, higher supply air temperature and opportunity of free cooling.
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