I am running a simple ideal air HVAC test to see if a given set of temperature and humidity setpoints can be achieved and visualizing the results in hourly plots. The simulation is for a museum so the setpoints need to be met at all times.
I am getting two distinct errors but nothing is flagging on the components.
Unmet hrs are showing 0 even though the temperature plot shows temperatures outside the temperature setpoint range (and outside of 1.1 deg C tolerance). It also does this when i use the custom outputs of:
Zone Heating Setpoint Not Met Time
Zone Cooling Setpoint Not Met Time
Do unmet setpoints hrs only analyse occupied hrs?
Do unmet hrs analyse and report time periods when the HVAC system is off?
is there a way of reporting total hrs outside of a temperature and humidity range?
Based on the temperature hourly plot, the ideal air system seems to be switching off during unoccupied times or times of low occupancy. Its my understanding that this should not be happening. (I have constant schedules for temperature and humidity) What could be the cause of this?
Hi @chris, @mostapha, @AbrahamYezioro I wanted to bump this as i have run in to more issues with the hourly plot. This time i am showing temperature above a range as red, within the range as green and under the range as blue. This is what the hourly plot looks like. This being pulled straight from the EPW file.
However when i interrogate the data with a conditional statement like this which should correlate with the green in the hourlyplot you can see i am getting very different results.
The default thermostats in Ladybug Tools are set to control air temperature (like most real-worlds thermostats). Not operative temperature, which includes the effects of all the surfaces in the room. So it’s very common to have the air setpoint met but the operative temperature is outside of those range because of sun falling on the surfaces, heat conducting out of poorly insulated glass, etc.
This is one of the many reasons why simply meeting the thermostat setpoint does not guarantee thermal comfort of the occupants.
