Passive Chilled beams utilise of a heat exchanger for cooling. Traditional passive chilled beam operation is based on natural convection. As the warm room air comes in contact with the cooled surface of the chilled beam it flows downwards through the beam into the room. Passive beams are not connected to the ventilation system. The primary air is supplied to the space using separate diffusers either in the ceiling or wall, or alternatively through the raised floor. A recommended maximum cooling of up to 200 W/m applies to passive convective chilled beams (Circa 95% convective elements) based upon the comfort criteria recommended with BS EN ISO 7730 (PPD <15 per cent).
Cooling Principles of Convective only Passive Chilled Beams
Convection based Passive Chilled Beam Installation Example