Re: [EnergyPlus_Support] Re: Plant temperatures are getting far too cold

On Thu, Aug 22, 2013 at 7:48 AM, energyplus_mimis <welma.pereira@xxxxxxxxx> wrote:

Do you have a boiler or other water heater in the plant loop? If there is one there the water should be heated as much as you set

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Maria Sole <mariasole297@...> wrote:
>
> I have already tried to change the CHW Loop Setpoint Manager but the severe error is always the same, i mean the outlet temperature is every time different but is always too low.
>
>
> ________________________________
> From: energyplus_mimis <welma.pereira@...>

> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Thursday, August 22, 2013 2:57 PM
> Subject: [EnergyPlus_Support] Re: Plant temperatures are getting far too cold
>
>
>
> Â
>
> It seems like your set point temperature for the plant loop is very low, check the temperature schedule in the SetpointManager:Scheduled
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "mariasole297" <mariasole297@> wrote:
> >
> > Hi,
> > i'm tring to simulate the following heating and cooling system:
> >
> > Groung heat exchanger+ heat pump+ heating/cooling floor
> >
> > When I start the simulation E+ always returns this sever error.
> >
> > ** Severe ** Plant temperatures are getting far too cold, check controls and relative loads and capacities
> > ** ~~~ ** Environment=SENZA TITOLO, at Simulation time=05/08 19:16 - 19:19
> > ** ~~~ ** PlantLoop Name (SupplySide)= CHW LOOP
> > ** ~~~ ** PlantLoop Setpoint Temperature=6.7 {C}
> > ** ~~~ ** PlantLoop Inlet Node (SupplySide) does not have a Setpoint.
> > ** ~~~ ** PlantLoop Inlet Node (DemandSide) does not have a Setpoint.
> > ** ~~~ ** PlantLoop Outlet Node (SupplySide) has a Setpoint.
> > ** ~~~ ** PlantLoop Outlet Node (DemandSide) does not have a Setpoint.
> > ** ~~~ ** PlantLoop Outlet Node (SupplySide) "CHW LOOP SUPPLY SIDE OUTLET" has temperature=-105.3 {C}
> > ** ~~~ ** PlantLoop Inlet Node (SupplySide) "CHW LOOP SUPPLY SIDE INLET" has temperature=7.1 {C}
> > ** ~~~ ** PlantLoop Minimum Temperature=1.0 {C}
> > ** ~~~ ** PlantLoop Maximum Temperature=98.0 {C}
> > ** ~~~ ** PlantLoop Flow Request (SupplySide)=0.0 {kg/s}
> > ** ~~~ ** PlantLoop Flow Request (DemandSide)=0.1 {kg/s}
> > ** ~~~ ** PlantLoop Node (SupplySide) "CHW LOOP SUPPLY SIDE OUTLET" has mass flow rate =0.1 {kg/s}
> > ** ~~~ ** PlantLoop PumpHeat (SupplySide)=3.4 {W}
> > ** ~~~ ** PlantLoop PumpHeat (DemandSide)=0.0 {W}
> > ** ~~~ ** PlantLoop Cooling Demand=218.9 {W}
> > ** ~~~ ** PlantLoop Heating Demand=0.0 {W}
> > ** ~~~ ** PlantLoop Demand not Dispatched=0.0 {W}
> > ** ~~~ ** PlantLoop Unmet Demand=62323.8 {W}
> > ** ~~~ ** PlantLoop Capacity=120000.0 {W}
> > ** ~~~ ** PlantLoop Capacity (SupplySide)=120000.0 {W}
> > ** ~~~ ** PlantLoop Capacity (DemandSide)=0.0 {W}
> > ** ~~~ ** PlantLoop Operation Scheme=CHW LOOP OPERAZIONE
> > ** ~~~ ** PlantLoop Operation Dispatched Load = 218.9 {W}
> > ** ~~~ ** PlantLoop Operation Dispatched Load (SupplySide)= 218.9 {W}
> > ** ~~~ ** PlantLoop Operation Dispatched Load (DemandSide)= 0.0 {W}
> > ** ~~~ ** Branches on the Loop.
> >
> >
> > I've tried to check the GSHPSimple-GLHE in the ExampleFile and get some changes but it doesn't work... Any ideas????
> > Maria
> >
>

Edwin Lee, PhD

Engineer, Commercial Buildings Research Staff

National Renewable Energy Laboratory