Sent from my iPhone
Jeannie,
I have an extremely large internal mass set for the only zone in the simulation. The building is a warehouse so the product inside has an outsized impact on the model.
If the critical flows and temps are consistent across each timestep - should I ignore the errors? Would increasing the interation limit help?
Thanks
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, jeannieboef <jeannieboef@...> wrote:
>
> output temp and mass flow on all critical nodes to make sure they
> values make sence. If your output:variable dictionary is set to idf
> format, you can copy paste the output text direct from the rdd file
> and paste it into the idf.
>
> Do you have any very high internal mass constructions, high
> infiltration rates or sharp and big setpoint changes?
>
> Sent from my iPhone
>
> On 03.12.2012, at 22:48, "thevinyldropper" <thevinyldropper@...>
> wrote:
>
> > Can anyone tell me how to decode max iteration errors? My simulation
> > is well controlled and everything seems to be working properly, but
> > I cant fix the max iteration errors. Not sure if I should just
> > ignore them. Below are two of the errors.
> >
> > ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC
> > loops, at RUN PERIOD 1, 04/01 11:05 - 11:10
> > ** ~~~ ** SimFlags=[TFFFF] AirLoops[T],ZoneEq[F],NonZoneEq
> > [F],PlantLoops[F],ElecCircuits[F]..F=ok,T=fail
> > ** ~~~ ** HVAC Tolerance Flags=[0100010] Enthalpy[0],MassFlow
> > [1],HumRat[0],Pressure[0],FlowQual[0],Energy[1],Temp[0]..0=ok,1=fail
> > ** ~~~ ** HVAC Tolerance Values, Most Recent listed first
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2973190.894, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=6.016E-002,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=1479.110, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[8 - NODE:FAN/AIRLOOP OUTLET]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2973190.894, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=6.016E-002,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=1479.110, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[8 - NODE:FAN/AIRLOOP OUTLET]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2973190.894, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** Plant Tolerance Flags=[00000000] Enthalpy[0],MassFlow
> > [0],HumRat[0],Pressure[0],FlowQual[0],Energy[0],Temp
> > [0],PlantFlowMassFlow[0]..0=ok,1=fail
> > ** ~~~ ** Plant Tolerance Values, Most Recent listed first
> > ** ~~~ ** Plant Flow Tolerance Values, Most Recent listed first
> > ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC
> > loops, at RUN PERIOD 1, 04/01 11:10 - 11:15
> > ** ~~~ ** SimFlags=[TFFFF] AirLoops[T],ZoneEq[F],NonZoneEq
> > [F],PlantLoops[F],ElecCircuits[F]..F=ok,T=fail
> > ** ~~~ ** HVAC Tolerance Flags=[0100010] Enthalpy[0],MassFlow
> > [1],HumRat[0],Pressure[0],FlowQual[0],Energy[1],Temp[0]..0=ok,1=fail
> > ** ~~~ ** HVAC Tolerance Values, Most Recent listed first
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2916452.724, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=6.016E-002,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=1451.570, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[8 - NODE:FAN/AIRLOOP OUTLET]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2916452.724, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=6.016E-002,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=1451.570, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[8 - NODE:FAN/AIRLOOP OUTLET]
> > ** ~~~ ** HVAC EnthalpyTol=0.000, MassFlowTol=123.866,
> > HumRatTol=0.0000, PressureTol=0
> > ** ~~~ ** FlowQualTol=0.00, EnergyTol=2916452.724, TempTol=0.00
> > ** ~~~ ** HVAC side outlet node=[14 - NODE 6]
> > ** ~~~ ** Plant Tolerance Flags=[00000000] Enthalpy[0],MassFlow
> > [0],HumRat[0],Pressure[0],FlowQual[0],Energy[0],Temp
> > [0],PlantFlowMassFlow[0]..0=ok,1=fail
> > ** ~~~ ** Plant Tolerance Values, Most Recent listed first
> > ** ~~~ ** Plant Flow Tolerance Values, Most Recent listed first
> >
> >
>
__._,_.___
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.
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___