Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I think ACB and PCB are normally compared not in terms of energy consumption but in terms of thermal comfort, installation area and installation cost.
If you compare energy consumption of active chilled beam (ACB) and passive chilled beam (PCB) with the same cooling capacity, it's reasonable that you have the same results.
ACB has larger cooling capacity per the coil area than PCB. If you want to compare ACB and PCB with the same coil area, you should hardsize Maximum Total Chilled Water Volumetric Flow Rate, Number of Beams and Beam Length. PCB would have larger unmethours than ACB if the hardsized capacity of PCB is insufficient to handle all the cooling loads.
Model Parameters in AirTerminal:SingleDuct:ConstantVolume:CooledBeam would affect to some extent, but it may not be easy to get the data from the manufacturer.
