Coil Operation On/Off
Hello guys,
I am trying to represent a cooling coil that operates on a on/off stage (either on 100% or on 0% of total capacity) in Open Studio. Whenever the room Dry Bulb Temperature is below the Thermostat Setpoint, the coil and the fan turns on (high capacity of 17585 W).
I have modeled an airloop with a fan, a coil, a setpoint manager a diffuser and a thermal zone. I am also using an availability manager to control when I want this system to work, based on a schedule I created (Picture 1)
Happens that my results show that my fan is working on On/Off (which is what I want to represent), but my coil is working with partial load (which is not what I want to represent). (Picture 2)
Does anyone know how I can solve this (make the coil either be at full load (17585 W) or a zero load (0W))?
Thanks
Related question/answer: https://unmethours.com/question/83418...
Hello @shorowit. I am not sure if that is my problem, because I want the coil to be either on 100% of its capacity or in 0% of its capacity.
I have read your answer on the post you mentioned, but I did not understand the relation since I do not have a heating system and my coil is turning on, but is not at its 100% capacity.
Can you explain more what was your ideia and how would it solve my problem?
Your coil is working correctly. Coil:Cooling:DX:SingleSpeed cools at its 100% capacity, but it cycles to meet the zone thermostat setpoint. It cycles even in one hour. That's why your result appears that the coil is not working at 100%. If the coil keep cooling at 100% and does not cycle, it overcools the zone.
Thanks for your answer @Keigo . One other thing I was trying to do is: As I have two
Air loopswith the same configuration (fan, coil, set point manager, diffuser and the Thermal Zone) and bothAir Loopsattend the sameThermal Zone, I was wonnndering if is possible to set up a priority on the coils. E.g. just one coil working until it reaches 100% of its hardsized value for the Cooling Capacity, and if it happens, then the second coil turns on. Do you know if that is possible an how to do that?ZoneHVAC:EquipmentListin EnergyPlus priorities Zone Equipements. If it does not work, you can use EMS (EnergyManagementSystem) in EnergyPlus to write a code of the control you want to do.I'm not quite sure if you know how to model two airloops in one thermal zone in the first place, but I guess you know it since you have been here for seven years.