Re: [EnergyPlus_Support] Re: water to water heat pump

Usually when PlantLoops get too hot or too cold the central plant systems are undersized or not operating properly.

On Mar 7, 2013 3:59 AM, "aleph_venturini" <aleph.venturini@xxxxxxxxx> wrote:

Actually I used DesignBuilder to set up the plant loops and now I'm trying to get it running with E+, but I get the same errors:

** Severe ** Plant temperatures are getting far too cold, check controls and relative loads and capacities
** ~~~ ** During Warmup, Environment=EDIFICIO DI PROVA GSHP, at Simulation time=01/01 00:05 - 00:07
** ~~~ ** PlantLoop Name (SupplySide)= GRUPPO FRIGO
** ~~~ ** PlantLoop Setpoint Temperature=10.0 {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) "GRUPPO FRIGO SUPPLY SIDE OUTLET" has temperature=-140.1 {C}
** ~~~ ** PlantLoop Inlet Node (SupplySide) "GRUPPO FRIGO SUPPLY SIDE INLET" has temperature=10.1 {C}
** ~~~ ** PlantLoop Minimum Temperature=0.0 {C}
** ~~~ ** PlantLoop Maximum Temperature=80.0 {C}
** ~~~ ** PlantLoop Flow Request (SupplySide)=0.0 {kg/s}
** ~~~ ** PlantLoop Flow Request (DemandSide)=3.7E-002 {kg/s}
** ~~~ ** PlantLoop Node (SupplySide) "GRUPPO FRIGO SUPPLY SIDE OUTLET" has mass flow rate =3.7E-002 {kg/s}
** ~~~ ** PlantLoop PumpHeat (SupplySide)=0.9 {W}
** ~~~ ** PlantLoop PumpHeat (DemandSide)=0.0 {W}
** ~~~ ** PlantLoop Cooling Demand=9.9 {W}
** ~~~ ** PlantLoop Heating Demand=0.0 {W}
** ~~~ ** PlantLoop Demand not Dispatched=0.0 {W}
** ~~~ ** PlantLoop Unmet Demand=23349.3 {W}
** ~~~ ** PlantLoop Capacity=39890.9 {W}
** ~~~ ** PlantLoop Capacity (SupplySide)=39890.9 {W}
** ~~~ ** PlantLoop Capacity (DemandSide)=0.0 {W}
** ~~~ ** PlantLoop Operation Scheme=GRUPPO FRIGO OPERAZIONE
** ~~~ ** PlantLoop Operation Dispatched Load = 9.9 {W}
** ~~~ ** PlantLoop Operation Dispatched Load (SupplySide)= 9.9 {W}
** ~~~ ** PlantLoop Operation Dispatched Load (DemandSide)= 0.0 {W}

Any idea?

Alessandro

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jeremiah Crossett <jcrossett@...> wrote:
>
> Possibly you would need to use a branch to connect your nodes. You know
> design builder recently added GSHP to its latest beta. With it you could
> have heating floor, wall or ceilings fluid loops connected to your GSHP
> with nodes automatically, then export to E+ to fine tune..
>
> On Wed, Mar 6, 2013 at 9:24 AM, Hanumesh <hanumeshreddy@...> wrote:
>
> > **
> >
> >
> > i am trying to create nodes but how can i connect floor heater to heatpump
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jeremiah Crossett wrote:
> > >
> > > You might post your errors--- did you check your node connections?
> > >
> > > On Wed, Mar 6, 2013 at 8:48 AM, aleph_venturini
> > > wrote:
> > >
> > > > **
> >
> > > >
> > > >
> > > > Hello! Did you eventually solve your problem with the GSHP?
> > > > I am trying to simulate both a cooling and a heating plant with
> > > > ground-coupled water to water heat pumps, but I always get errors or
> > the
> > > > plant does not work.
> > > > I have tried the following:
> > > > - GroundHeatExchanger:Vertical
> > > > - GroundHeatExchanger:Pond
> > > > - HeatPump:WaterToWater:EquationFit:Heating & Cooling
> > > > - HeatPump:WaterToWater:ParameterEstimation:Cooling & Heating
> > > >
> > > > in all cases I copy/pasted the GSHP objects from the E+ example files
> > into
> > > > my idf, but i cannot get a working simulation and I don't understand
> > where
> > > > the errors i get could come from.
> > > > I'd be very glad to know if someone of you did get some GSHP plant
> > > > actually running... thanks
> > > >
> > > > Alessandro
> > > >
> > > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "direzionecontraria" wrote:
> > > > >
> > > > > Thank you very much to both! I think that I'll use those
> > spreadsheets a
> > > > lot.
> > > > >
> > > > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie wrote:
> > > > > >
> > > > > > And if you want to look for where specific objects are found in the
> > > > > > example files, click on the Example Files Links to Objects
> > spreadsheet.
> > > > > >
> > > > > > At 07:02 AM 9/6/2012, Dru Crawley wrote:
> > > > > >
> > > > > >
> > > > > > > From your Start button, go to: All Programs, EnergyPlus V7-1-0,
> > and
> > > > > > > click on Example Files Summary Spreadsheet. That lists all the
> > > > > > > example files that ship with EnergyPlus along with a short
> > summary.
> > > > > > >
> > > > > > >You're looking for GSHP (ground source heat pump).
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >On Thu, Sep 6, 2012 at 3:31 AM, FrancescoP
> > > > > > >< direzionecontraria@> wrote:
> > > > > > >
> > > > > > >
> > > > > > >What example files regarding geothermal water to water heat pumps
> > > > > > >are available?
> > > > > > >Regards
> > > > > > >
> > > > > > >--- In
> > > > > > >EnergyPlus_Support@xxxxxxxxxxxxxxx,
> > > > > > >Germana Regis wrote:
> > > > > > > >
> > > > > > > > Dear all,
> > > > > > > >
> > > > > > > > I'm trying to simulate a geothermal water to water (equation
> > fit)
> > > > > > > heat pump.
> > > > > > > > I used the example file as a reference but something doesn't
> > work
> > > > > > > and I can't
> > > > > > > > explain why.
> > > > > > > > I have two loops, a cooling and a heating one and they work
> > > > separately in
> > > > > > > > different seasons.
> > > > > > > > In summer conditions the heat pump works correctly but in the
> > > > > > > heating mode it
> > > > > > > > doesn't start at all.
> > > > > > > > The pump works, there is fluid circulation into the low
> > > > > > > temperature radiant
> > > > > > > > floor but the heat pump doesn't contibute to rise up the
> > > > > > > temperature of the
> > > > > > > > water.
> > > > > > > > I also tried to put a boiler beside and, of course, it
> > satisfies
> > > > > > > the heating
> > > > > > > > demand of the zone, although it doesn't have the priority.
> > > > > > > > It seems like the HP is not connected at all, but branches
> > don't
> > > > > > > produce any
> > > > > > > > error message.
> > > > > > > > Is there anybody who has an idea on what (maybe) is going
> > on?!?!
> > > > > > > > Thank you very much!
> > > > > > > > Germana
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > > --
> > > *Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions*
> >
> > > *
> > > 120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951
> > > www.phasechange.com
> > > *
> > >
> >
> >
> >
>
>
>
> --
> *Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions*
> *
> 120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951
> www.phasechange.com
> *
>