I'm modeling a DOAS system in eQuest, and the HVAC control sequence basically calls for delivering 55°F in cooling mode and 70°F in heating mode. The heating/cooling mode is dictated by outside air temperature. This is basically in order to deliver "temperature-neutral" air to the subsystems (and a few corridors with simple ventilation grilles) that are only going to handle the thermal load of the space, and not the outside air load (handled by DOAS).
In E+ it's a pretty simple task, but here I've been struggling on how to properly do this in eQuest.
Right now I've got a PSZ system with a control zone beeing a "dummy zone" for which I've assigned a cooling schedule at constant 55°F and a heating schedule at constant 70°F. But the hourly output indicates that it's basically always providing roughly 62.5°F, so the average of my cooling and heating setpoints.
I've tried multiple ways, and read through the archives of the different mailing lists, but I didn't find a working answer.
Basically, is there a way to model either of these two scenarios in eQuest for a DOAS system? (aside from manually creating an annual schedule that would turn heating or cooling off.)
Midpoint controller:
Hysteresis controller:
