I am modeling direct evaporative cooling and notice the RH in the zones getting high. I am modeling this in OpenStudio, and work in Colorado where this is almost always a design consideration for a building in this climate. As such, I would like to better understand how this system operates in OpenStudio and specifically how to control humidity.
Does the Outside Air Damper open to 100% when the direct evaporative cooling is enabled? This is typically a real-world control strategy to control RH.
Open Studio has humidity set-points that the user can set at the zone level. This was the approach I first took, however the software to me appears to either have a bug or I am incorrectly using it. When I enter a set-point schedule into the fields and the tab refreshes, the schedule disappears. Any help?
What are some output variables to report to better understand the direct evap operation?
It would be great to hear any other suggestions you have when modeling direct evaporative cooling.
Thanks!
