What approaches have people used in EnergyPlus or OpenStudio to model active chilled beams with a variable primary air flow rate? The EnergyPlus components are constant volume resulting in excess fan consumption and incorrect cooling/heating behaviour at the chilled beam. I've been thinking that using VAV with fan coil units that have their fan-power zeroed out is a good solution for space types where load strongly follows occupancy/ventilation requirements, but this breaks down in instances where load and ventilation aren't strongly coupled.

What approaches have people used in EnergyPlus or OpenStudio to model active chilled beams with a variable primary air flow rate? The EnergyPlus components are constant volume resulting in excess fan consumption and incorrect cooling/heating behaviour at the chilled beam. I've been thinking that using VAV with fan coil units that have their fan-power zeroed out is a good solution for space types where load strongly follows occupancy/ventilation requirements, but this breaks down in instances where load and ventilation aren't strongly coupled.