What is an Active Chilled Beam system?
An Active Chilled Beam is an air-water system that uses the energy conveyed by two fluid streams to achieve the required cooling or heating in a space. The air supplied by the central air handler to the active chilled beams is called primary air. The primary air is supplied to the active chilled beams at a constant volume and at a relatively, low static pressure (typically under 0.5″ wc). Within the Active Chilled Beam terminal unit the primary air is discharged into a mixing chamber through a series of nozzles. A zone of relative low pressure is created within the mixing chamber, thereby inducing room air through the secondary water coil into a mixing chamber. The induced room air is called secondary air. In the cooling mode the primary air is cool and dry, satisfying a portion of the room’s sensible load and all of its latent load. The secondary water coil within the active chilled beam terminal unit is supplied with chilled water to offset the remaining internal sensible load of the
