Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The NREL Radiance Measure has a facility for this, via the 3-phase method; you have to set up two constructions that represent the glazing Tvis in the tinted and bleached states, and there's a simple window-mounted controller (you can change the setpoint) that dictates which state is used for each (hourly) timestep. For EnergyPlus only, you could use EMS to change the Tvis to your heart's content.
