A new book from ASHRAE and the Federation of European Heating, Ventilation and Air-Conditioning Associations (REHVA) provides guidance on designing chilled-beam systems.
The Active and Passive Beam Application Design Guide was produced through a collaboration of worldwide experts to give system designers a current, authoritative guide on successfully applying active and passive beam technology. Building on REHVA’s previously published Chilled Beam Application Guidebook, the new guide provides up-to-date tools and advice for designing, commissioning, and operating chilled-beam systems. It includes examples of active and passive beam calculations and selections.
Active and passive beam systems are energy-efficient solutions for spaces that require individual zone control and where internal moisture loads are moderate. “Active and passive beam systems provide good thermal comfort and energy and space saving advantages; and the operation of such systems is simple, with low maintenance requirements,” co-editor John Woollett said. “In a building where the goal is a low energy usage index, beams can be an excellent choice of indoor climate product.”
Although they are often referred to as “chilled” beams, in many cases active beams can be used for both heating and cooling. Active and passive beams are room air recirculation devices that transfer sensible heat to and from the space using water. In addition, conditioned primary air is ducted to active beams. Active and passive beams may be integrated with acoustic ceilings or independently mounted.