[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[EnergyPlus_Support] Re: CheckForRunawayPlantTemps
Hello
I turned off the HW Loop during the summer season through a schedule in the AvailabilityManager and now it works without fatal error.
Thank you.
Best Regards
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Mário <mneves32@...> wrote:
>
> Hello,
>
> If you set your pump head to 1 Pa the error is gone.
>
> I think the problam is that the energy of the Pump Head is converted in to Heat, thus heating the water loop.
>
> Try using a Manager to turn of the pumps when heating is not needed.
>
> Best Regardes
>
> MN
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, direzionecontraria <direzionecontraria@> wrote:
> >
> > Hello.
> > I am
> > a beginner in using EnergyPlus. I created a model in DesignBuilder and I
> > exported the .idf file in EnergyPlus. I attach the file.
> > I have
> > the following error:
> > Â
> > **
> > Severe ** Plant temperatures are getting
> > far too hot, check controls and relative loads and capacities
> > Â Â **Â Â ~~~Â Â **Â Environment=SPINIGARDOLO, at Simulation
> > time=09/08 08:00 - 08:30
> > Â Â **Â Â ~~~Â Â ** PlantLoop Name
> > (SupplySide)= HW LOOP
> > Â Â **Â Â ~~~Â Â ** PlantLoop Setpoint
> > Temperature=14.0 {C}
> > Â Â **Â Â ~~~Â Â ** PlantLoop Inlet Node
> > (SupplySide) does not have a Setpoint.
> > Â Â **Â Â ~~~Â Â ** PlantLoop Inlet Node
> > (DemandSide) does not have a Setpoint.
> > Â Â **Â Â ~~~Â Â ** PlantLoop Outlet Node
> > (SupplySide) has a Setpoint.
> > Â Â **Â Â ~~~Â Â ** PlantLoop Outlet Node
> > (DemandSide) does not have a Setpoint.
> > Â Â **Â Â ~~~Â Â ** PlantLoop Outlet Node
> > (SupplySide) "HW LOOP SUPPLY SIDE OUTLET" has temperature=299.9 {C}
> >   **  ~~~  ** PlantLoop Inlet Node (SupplySide) "HW LOOP SUPPLY
> > SIDE INLET" has temperature=299.9 {C}
> > (..)
> > ** Fatal ** CheckForRunawayPlantTemps: Simulation terminated because of run away
> > plant temperatures, too hot
> > Â
> > I
> > think that finding an overheating within the HW LOOP in September is
> > strange, because in that period the HW
> > LOOP should not work (see PlantEquipmentOperationSchemes: as â??Control Scheme 1
> > Scheduleâ?? I imposed â??winterâ??, which is on only during the winter season).
> > During the summer season I imposed a low PlantLoop Setpoint Temperature (14.0 °C)
> > because the HW system should not work. Is it sensible?
> > I tried to solve the error changing the schedule in â??SetpointManager:Scheduledâ?? (s.
> > â??winter65â??), but without success.
> > In the discussion
> > http://tech.groups.yahoo.com/group/EnergyPlus_Support/message/24203
> > I read about a similar problem in another model.
> > In that case the problem was the HeaderedPumps object, but in my model there
> > isnâ??t any HeaderedPumps object.
> > As that discussion suggested, I added
> > Output:Variable,HW Loop Demand Side Bypass Pipe
> > Inlet Node,System Node Temp
> > but with that object the simulation crashed
> > without providing fatal error message.
> > In the HVAC loop in correspondence of the boiler
> > there is a bypass. How can I determine how much water flow flows through the
> > bypass?
> > Thank
> > you for your attention!
> > Best
> > Regards
> > Francesco
> > Passerini
> >
>
------------------------------------
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/EnergyPlus_Support/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/EnergyPlus_Support/join
(Yahoo! ID required)
<*> To change settings via email:
EnergyPlus_Support-digest@xxxxxxxxxxxxxxx
EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/