Investigation of average air velocity and turbulence intensity in a slot ventilated space

Abstract

In HVAC practice in slot ventilated spaces tangential air distribution systems are generally used. The determination of average air velocity and turbulence intensity is most important from the point of view of draught comfort, of effective and economical ventilation.

In this paper the changing of the average air velocity, turbulence intensity and the relative average air velocity at different measurement heights were investigated considering the connection between these quantities in a slot ventilated space. Both the average air velocity and turbulence intensity determine the draught rate (DR), which affects draught comfort in ventilated spaces.

Using the experimental investigation method we found that the changing of the average air velocity and turbulence intensity at the relevant heights may depend on the tangential air distribution system.