Computational Fluid Dynamics (CFD) Analysis of Chilled Beams

Active and passive chilled beams can provide energy-efficient operation due to their hydronic sensible cooling, lower fan power requirements, and reduced reheat during low load or part load cooling conditions. Active chilled beams consist of linear diffusers on two sides with a return at the center. The room air is induced through the return which passes through the cooling/heating coils and mixes with the primary air before it is supplied to the room. A passive chilled beam consists of a hydronic coil which through natural convection induces air movement in the room.

Several factors can affect the performance of chilled beam systems such as their capacity, location and orientation, supply airflow rates, associated induction airflow rates, and location and strength of various sensible heat sources in the space.

Our proprietary CFD analysis procedures help our clients optimize the performance of the chilled beam systems by developing their strategic locations and orientations. Our analyses predict airflow patterns; temperature distribution; and importantly, the thermal comfort of the occupants.

Airflow patterns with a passive chilled beam in an office space.

Temperature distribution in a patient room with an active chilled beam.