Active Chilled Beams

Active Chilled beams are connected to both the ventilation supply air ductwork and the chilled water supply. If required, low temperature hot water (LTHW) can be used in this system for heating. The main air handling unit supplies primary air into the various rooms through the chilled beam. An active chilled beam uses the primary air supply to induce warm room air into the beams cooling battery (heat exchanger). In order to cool or heat the room either cold or warm water is circulated through the beams battery. Active chilled beams are able to induce and condition 4-5 times as much room air as fresh air supplied. The re-circulated air and the primary air are mixed prior to being reintroduced into the room by nozzles or slots along the beam. Best practice for active chilled beam systems is to have highly efficient chilled beams, that can achieve the sensible cooling requirements on the chilled waterside circuit when the corresponding amount of primary fresh air is selected to only handle the latent gains and meet typical respiratory requirements of 12lts/sec/person. Typically a building with an occupancy density of 1 person in every 8m² the amount of primary air should equate to around 1.5lts/sec/m².

More information on Active Chilled Beam products.

Active chilled beams produces spacial conditioning through a combination of airside and waterside cooling.

Active Chilled Beam Cooling Principles

Cooling Principles of an Active Chilled Beam Installed in a Ceiling Grid.

Active Chilled Beam Installation