Hello! I am a student who just started working with rhino/grasshopper, and now I have encountered my first problem, which is very high energy usage for heating during summer. I made a geometry for an apartment complex with three floors, and windows to the north and south. There is no internal walls, as the geometry is supposed to be as general as possible. The goal is to keep the amount of hours above cooling setpoint (26 degrees celsius) within a year to 50 at max. There is no active cooling in the building, so I have added window opening control. My ventilation system is ideal, and all heating is happening through there. I have set the values as seen in the pictures, but despite windows closing at 23.9 degrees indoors, it looks like heating is starting (setpoint 21 degrees). Previously, I tried to add an economizer to the ideal HVAC system, but got warnings about overheated surfaces. The same happened when I tried to add a schedule for availability for heating, so it would not be available during summer.
I have also tried to increase the minimum outdoor air temperature, but then the hours exceed 50, and I will have to increase the operable fraction area for the windows, which again leads to more heating.
I have checked my U-values and everything seems fine. The values pictured above are the ones that are needed to reach the goal of less than 50 hours above cooling setpoint. The energy demand for heating at these values is simulated to be 42.7 kWh/m^2.
If there are any questions about any other values please don’t hesitate to ask!
If anyone has any advice on what to try, it would be greatly appreciated!