The Active Chilled Beam system works on the principle of using a chilled water heat exchanger installed in a terminal in the ceiling to cool the occupied space. The system uses primary conditioned air introduced through the chilled beam terminal for ventilation and humidity control and to create the induction of room air through the terminal heat exchanger using special air nozzles.
The system provides substantial energy savings because it uses relatively high chilled water temperatures in the terminal heat exchanger, typically 15 deg C supply water, resulting in large savings in first cost and the running costs for of the system water chillers. It also allows the heat exchanger in the room chilled beam terminals to operate without condensation thereby avoiding the maintenance and hygiene issues associated with the condensate drainage from other terminals like fan coil units.
There are further large savings in fan energy required to move air around the building because the system does not rely on air to offset the cooling loads and therefore the amount of air used can be reduced to only that needed for ventilation, humidity control and to operate the nozzles for the induction process.
The active chilled beam system has become very popular in Europe due to its energy saving capability and also because the amount of air flow required is much reduced compared to other systems that rely on air for cooling the room. This results in excellent air quality and also makes the system very suitable for hospitals and medical facilities which want to eliminate re-circulated air.
Starec has a complete range of active chilled beams with 2 way and 4 way air discharge, with nominal widths of 300mm and 600mm to suit most ceiling configurations. Unit lengths are available from 600mm to 3000mm.