Hello, I am deseperately trying to control supply air temperature and humidity ratio without using an EMS program. I am expecting my system to supply air between 19° and 26° all year long, but I am also setting a setpoint to humidify the supply air.
Unfortunately the temperature setpoint managers doesn't seem to be able to take into account the small sensible load from the Humidifier:Steam:Electric. So during cooling season I don't reach my temperature setpoint (+1) and in heating season I overheat my air (+1)
I have set one SM on cooling coil node, one on the supply outlet node, and one SM minimumhumidityratio on the humidfier outlet node. I am also using SM:MixedAir to take into account the fan temperature increase, I tried to do the same with humidifier, but without success.
My branch, is the following (drawthrough configuration):
Branch,
z-7ik1vgwyt|air_loop, ! Name
, ! Pressure Drop Curve Name
fan:systemmodel, ! Component 1 Object Type
z-7ik1vgwyt|air_loop|fan_exhaust, ! Component 1 Name
z-7ik1vgwyt|mechanical_ventilation|return|0, ! Component 1 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|return|1, ! Component 1 Outlet Node Name
airloophvac:outdoorairsystem, ! Component 2 Object Type
z-7ik1vgwyt|air_loop, ! Component 2 Name
z-7ik1vgwyt|mechanical_ventilation|return|1, ! Component 2 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|supply|2, ! Component 2 Outlet Node Name
coilsystem:cooling:dx, ! Component 3 Object Type
z-7ik1vgwyt|air_loop|cta|cooling_coil, ! Component 3 Name
z-7ik1vgwyt|mechanical_ventilation|supply|2, ! Component 3 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|supply|3, ! Component 3 Outlet Node Name
coil:heating:electric, ! Component 4 Object Type
z-7ik1vgwyt|air_loop|cta|heating_coil, ! Component 4 Name
z-7ik1vgwyt|mechanical_ventilation|supply|3, ! Component 4 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|supply|4, ! Component 4 Outlet Node Name
humidifier:steam:electric, ! Component 5 Object Type
z-7ik1vgwyt|humidifier, ! Component 5 Name
z-7ik1vgwyt|mechanical_ventilation|supply|4, ! Component 5 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|supply|5, ! Component 5 Outlet Node Name
fan:systemmodel, ! Component 6 Object Type
z-7ik1vgwyt|air_loop|fan_supply, ! Component 6 Name
z-7ik1vgwyt|mechanical_ventilation|supply|5, ! Component 6 Inlet Node Name
z-7ik1vgwyt|mechanical_ventilation|supply|6; ! Component 6 Outlet Node Name
I am working directly on EnergyPlus 22.1.0.
Looking forward for some clues :)
