Trouble with the HVAC setting
Dear all,
I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.
Has someone of you any idea how should I do to solve this issue? I attach the idf below.
Thank you very much
Have a nice day
Elena
part of the error message:
************* Beginning System Sizing Calculations
************* Beginning Plant Sizing Calculations
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 2
** ~~~ ** the apparatus dew-point is below the coil design inlet water temperature;
** ~~~ ** the coil outlet design conditions will be changed to correct the problem.
** ~~~ ** The initial design conditions are: Tair,in = 25.9833
** ~~~ ** Wair,in = 9.554298E-003
** ~~~ ** Twater,in = 7.2200
** ~~~ ** Tair,out = 9.2200
** ~~~ ** Wair,out = 6.585921E-003
** ~~~ ** The revised design conditions are: Tair,out = 9.2195
** ~~~ ** Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL
** ~~~ ** no apparatus dew-point can be found for the initial entering and leaving conditions;
** ~~~ ** the coil outlet design conditions will be changed to correct the problem.
** ~~~ ** The initial design conditions are: Tair,in = 25.9845
** ~~~ ** Wair,in = 1.167724E-002
** ~~~ ** Twater,in = 7.2200
** ~~~ ** Tair,out = 9.2200
** ~~~ ** Wair,out = 6.585921E-003
** ~~~ ** The revised design conditions are: Tair,out = 9.2195
** ~~~ ** Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 1
** ~~~ ** the apparatus dew-point is below the coil design inlet water temperature;
** ~~~ ** the coil outlet design conditions will be changed to correct the problem.
** ~~~ ** The initial design conditions are: Tair,in = 25.9901
** ~~~ ** Wair,in = 9.862493E-003
** ~~~ ** Twater,in = 7.2200
** ~~~ ** Tair,out = 9.2200
** ~~~ ** Wair,out = 6.585921E-003
** ~~~ ** The revised design conditions are: Tair,out = 9.2195
** ~~~ ** Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 3
** ~~~ ** the apparatus dew-point is below the coil design inlet water temperature;
** ~~~ ** the coil outlet design conditions will be changed to correct the problem.
** ~~~ ** The initial design conditions are: Tair,in = 25.9832
** ~~~ ** Wair,in = 9.506870E-003
** ~~~ ** Twater,in = 7.2200
** ~~~ ** Tair,out = 9.2200
** ~~~ ** Wair,out = 6.585921E-003
** ~~~ ** The revised design conditions are: Tair,out = 9.2195
** ~~~ ** Wair,out = 6.586107E-003
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-1".
** ~~~ ** No "PEOPLE" object has been specified in the ...
my idf file
@Elena Guidolin please use existing tags whenever possible - e.g. "energyplus" not "energy+". Also, are you using OpenStudio? If not, please remove that tag. Thanks for helping to keep the site organized.
sorry for the "energy+" tag..it has been an oversight..how can I change it? And yes I'm using Openstudio for this project. Thank u for the support.
You can
edit
your question to change the tags or provide updates or additional information.There is also a 'retag' if you only want to modify the tags.
FYI to use the
retag
feature you'll have to hitenter
after making the changes.Also, it will be more helpful to include the severe errors from the ERR file in your question. See this question for a how to.
error file