A chilled beam is a terminal air conditioning unit intended primarily to cool air convectively in a room using ice water. It can be passive or active. Active beams can also be used to heat the room.
Passive chilled beams are in the form of a very long heat exchanger. Active chilled beams additionally have a fresh air supply connected to an external ventilation system. The fresh air is injected by small nozzles, creating a secondary draught coming from the room. The convection in the exchanger is thus reinforced.
Chilled beams are coupled with a chilled water production unit (cooling) to supply the water into the thermal batteries at the correct temperature.
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Thermal comfort for buildings