By the mid 1990s, European engineers had fabricated a linear slot diffuser
with induction nozzles and a coil.
With a ceiling slot diffuser
, the air in the room is gradated; at the diffuser, air at approximately 13[degrees]C (55[degrees]F) enters the room and washes the window.
The AC design uses a laminar flow diffuser array over the surgical table with a high velocity slot diffuser
at the perimeter of the sterile field.
locations were determined by an attempt to obtain good room air distribution and allow scanning with the movable instruments.
Air at the inlet vents was supplied into the room through a linear slot diffuser
(Srebric and Chen 2002) with four slots.
As mentioned in a prior article, adjusting a linear slot diffuser
so that it no longer blows down on occupants will invalidate any prior system balance.
Termination Types Tested with Corresponding Duct Sizes and Flex Duct Usage Termination Type Flex Duct Duct Size Terminations Single-slot diffuser
No 6 x 10 Titus ML39 diffuser Open Yes Small Open Rigid (2-layers MDF) Yes Small Rigid Single-slot diffuser
Yes 6 x 10 Titus ML39 diffuser Square-face diffuser Yes 6 x 6, 6 x 10 Titus TDC diffuser Plenum Yes 6 x 10 Plenum Plenum with single- Yes 6 x 10 Plenum + ML39 slot diffuser
Dean also developed a linear slot diffuser
designed to maintain the "coanda effect" without aperture variation throughout the air modulation range.
A linear slot diffuser
almost always be should be set to provide a horizontal air pattern, along the surface to which it is mounted.
These are specially designed because the air curtain must typically have far less velocity than a slot diffuser
used for general ventilation purposes.
Diffuser Type Characteristic Length [angle] High Sidewall Grille Distance to Wall Perpendicular to Jet Circular Ceiling Pattern Distance to Closest Wall or Diffuser Intersecting Air Jet Sill Grille Length of Room in Direction of Jet Flow Ceiling Slot Diffuser
Distance to Wall or Midplane Between Outlets Light Troffer Diffusers Distance to Midplane Between Outlets Plus Distance from Ceiling to Top of Occupied Zone Cross-Flow Pattern Ceiling Distance to Wall or Midplane Between Diffusers Outlets Table 2: Air diffusion performance index (ADPI) selection guide from 2009 Handbook--Fundamentals.
The PLM was then used to predict the flow field in a room with a two-dimensional slot diffuser