[EnergyPlus_Support] Model too big and too complicated? Part 2 - the E+ model

["jipp06" <jippnojunk@xxxxxxxxx>]

hello again,

So like I said in the other msg I just posted I think I went a bit too hard on the zoning in this model and it complicated the model down the road.
Building is 10 stories of offices with basement for just over 200 000sf. including indoor garage in bsmt.
The model has 61 zones, 1100 BuildingSurface:Detailed, 385 FenestrationSurface:Detailed, 5 main HVAC systems including Perimeter VAV, central VAV, basement (cafeteria) VAV, kitchen 100% make up air and server room LIEBERT, 
There are 1 main chiller on a water tower, 1 auxiliary chiller with DX cooler, and a freecooler with water to water heat exchanger on the cooling water loop for when the weather is below 4*C.

I am considering rezoning the model in a much simpler manner now.

Zoning is:
5 zones per floor (typical) = N,S,E & W perimeter zones and a center zone.
1 extra zone for a server room on ground floor, 
1 main hall
8 zones in the basement for various uses. (I should have made 3 really = garage, kitchen and cafeteria neglecting small admin offices and a mech room)
1 heated mechanical penthouse on the roof.

So the number of zones made it harder especially for the matching of inside surfaces.!! :) also, I cannot mix the central zone with more than one perimeter zone so I need to add heating when there is none.

I have had the model CRASH on me, I re-run the model after a fresh PC bootup and it went through... but with 
EnergyPlus Completed Successfully-- 1387750 Warning; 0 Severe Errors; Elapsed Time=01hr 31min 28.49sec

I don't get the ===== Recurring Error Summary =====.
The temperatures, Enthalpy, Relative Humidity must be insane to get out of range. I ran many previous versions of this model without these particular errors.
I would like some clues.
The error file is posted at the end of this msg.(should I upload a file instead next time?)

Last modifications were:
 - added OtherSideCoefficients and supporting scheduels for the underground surfaces (after I ran the bsmt preprocessor)
 - changed a few output:variable (have 21 in total)
 - changed OutputControl:Table:Style to CommaAndHTML,
 - added heating to central zones with baseboards to the HVACTemplate:Zone:VAV objects
the only thing I think can do that is the OtherSideCoeficients...

(BTW I use WINMERGE free software to compare text files)


QUESTIONS:
#1 - I imagine that model computational and file "weight" is proportional to the number of surfaces and HVAC systems mainly. will it help reduce the crashing if I reduce the number of zones?
#2 - can these type of errors make the model crash in some instances but not allways if we ran the model multiple times?
#3 - I understand that recurring errors can occur at different "places" but this error file doesn't tell us much about where to look.

THANKS a lot!

ERROR FILE POST
Program Version,EnergyPlus 6.0.0.023, 2011-05-05 21:51,IDD_Version 6.0.0.023
   ** Warning ** Output:PreprocessorMessage="ExpandObjects" has the following Warning conditions:
   **   ~~~   ** Warning:  In HVACTemplate:System:PackagedVAV "GARAGE OA" the Heating Coil
   **   ~~~   ** Design Setpoint is greater than the Cooling Coil Design Setpoint. This may
   **   ~~~   ** cause the heating coil and cooling coil to operate simultaneously. Check
   **   ~~~   ** results carefully and adjust controls if needed.
   ************* Beginning Zone Sizing Calculations
   ** Warning ** BuildingSurface:Detailed="E194FF", Sun Exposure="SUNEXPOSED".
   **   ~~~   ** ..This surface is not exposed to External Environment.  Sun exposure has no effect.
   ** Warning ** GetSurfaceData: InterZone Surface Areas do not match as expected and might not satisfy conservation of energy:
   **   ~~~   **   Area=140.4 in Surface=3C6DD1, Zone=ZN-01
   **   ~~~   **   Area=146.6 in Surface=E9AF30, Zone=ZN-02
   ** Warning ** Calculated design cooling load for zone=Z-00-GARAGE is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=Z-00-MECA is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=Z-00-UPS is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=Z-00-ELECT is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=Z-00-EAU is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design heating load for zone=Z-01-TI is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ** Warning ** Calculated design cooling load for zone=Z-11-PH is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ************* Beginning System Sizing Calculations
   ** Warning ** ManageSizing: Calculated Heating Design Air Flow Rate for System=SERVEUR TI is zero.
   **   ~~~   ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
   ************* Beginning Plant Sizing Calculations
   ** Warning ** In calculating the design coil UA for Coil:Cooling:Water VAV CAFET COOLING COIL
   **   ~~~   ** 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 = 28.7591
   **   ~~~   **                                    Wair,in = 1.193842E-002
   **   ~~~   **                                    Twater,in = 7.0000
   **   ~~~   **                                    Tair,out = 14.0000
   **   ~~~   **                                    Wair,out = 8.000000E-003
   **   ~~~   ** The revised design conditions are: Tair,out = 12.9801
   **   ~~~   **                                    Wair,out = 8.411890E-003
   ** Warning ** In calculating the design coil UA for Coil:Cooling:Water 100P100 CUIS COOLING 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 = 26.4072
   **   ~~~   **                                    Wair,in = 1.354281E-002
   **   ~~~   **                                    Twater,in = 7.0000
   **   ~~~   **                                    Tair,out = 19.0000
   **   ~~~   **                                    Wair,out = 8.000000E-003
   **   ~~~   ** The revised design conditions are: Tair,out = 15.0041
   **   ~~~   **                                    Wair,out = 9.611298E-003
   ** Warning ** Output:Meter: invalid Name="PLANTLOOPCOOLINGDEMAND" - not found.
   ************* Testing Individual Branch Integrity
   ************* All Branches passed integrity testing
   ************* Testing Individual Supply Air Path Integrity
   ************* All Supply Air Paths passed integrity testing
   ************* Testing Individual Return Air Path Integrity
   ************* All Return Air Paths passed integrity testing
   ************* No node connection errors were found.
   ************* Beginning Simulation
   ** Warning ** Calculated Relative Humidity out of range (PsyRhFnTdbWPb)
   **   ~~~   **  Routine=CalcMultiSpeedDXCoil:lowspeedoutlet, Environment=MONTREAL INT'L ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:08 - 00:10
   **   ~~~   **  Dry-Bulb= -59.60 Humidity Ratio= 1.000E-005 Calculated Relative Humidity [%]= 142.28
   **   ~~~   ** Relative Humidity being reset to 100.0%
   ** Warning ** Enthalpy out of range (PsyTsatFnHPb)
   **   ~~~   **  Routine=CalcMultiSpeedDXCoil:newdewpointconditions,
   **   ~~~   **  Environment=MONTREAL INT'L ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:10 - 00:11
   **   ~~~   **  Enthalpy=-113338.64975 Pressure= 100893.00
   **   ~~~   **  Initial Resultant Temperature= -59.98
   ** Warning ** Calculated Humidity Ratio invalid (PsyWFnTdbH)
   **   ~~~   **  Routine=CalcMultiSpeedDXCoil:newdewpointconditions,
   **   ~~~   **  Environment=MONTREAL INT'L ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:10 - 00:11
   **   ~~~   **  Dry-Bulb= -59.98 Enthalpy= -131202.349
   **   ~~~   ** Calculated Humidity Ratio= -2.9681E-002 ... Humidity Ratio set to .00001
   ** Warning ** Temperature out of range [-100. to 200.] (PsyPsatFnTemp)
   **   ~~~   **  Routine=CalcMultiSpeedDXCoil:lowspeedoutlet, Environment=MONTREAL INT'L ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:10 - 00:11
   **   ~~~   **  Input Temperature=-130.59
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 01/04 00:00 - 00:15
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings;   to show more details on each max iteration exceeded.
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 01/14 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 01/20 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 01/25 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 01/27 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 02/08 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 02/16 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 02/17 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 02/23 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 02/24 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 03/01 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 03/07 00:00 - 00:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 03/13 23:00 - 23:15
   ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at FULL YEAR RUN, 03/20 23:00 - 23:15
   ** Warning ** Temperature out of range [-100. to 200.] (PsyTwbFnTdbWPb)
   **   ~~~   **  Routine=Unknown, Environment=FULL YEAR RUN, at Simulation time=06/16 10:30 - 10:45
   **   ~~~   **  Input Temperature=672.13
   **   ~~~   **  Resultant Temperature= 99.90
   ************* There are 15 unused schedules in input.
   ************* Use Output:Diagnostics,DisplayUnusedSchedules; to see them.
   *************
   ************* ===== Recurring Surface Error Summary =====
   ************* The following surface error messages occurred.
   *************
   ************* Base Surface does not surround subsurface errors occuring...
   ************* Check that the GlobalGeometryRules object is expressing the proper starting corner and direction [CounterClockwise/Clockwise]
   *************
   ** Warning ** Base surface does not surround subsurface (CHKSBS), Overlap Status=No-Overlap
   **   ~~~   **   The base surround errors occurred 1 times.
   **   ~~~   ** Surface "C42F28" misses SubSurface "A1B53B"
   *************
   **   ~~~   **   The base surround errors occurred 1 times (total).
   *************
   *************
   ************* ===== Recurring Error Summary =====
   ************* The following recurring error messages occurred.
   *************
   *************  ** Warning ** Calculated Relative Humidity out of range (PsyRhFnTdbWPb)
   *************  **   ~~~   **   This error occurred 224810 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************  **   ~~~   **   Max=114573.833292 %  Min=101.03011 %
   *************
   *************  ** Warning ** Enthalpy out of range (PsyTsatFnHPb)
   *************  **   ~~~   **   This error occurred 448750 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************  **   ~~~   **   Max=-42421.12774 J/kg  Min=-31132399.906316 J/kg
   *************
   *************  ** Warning ** Calculated Humidity Ratio invalid (PsyWFnTdbH)
   *************  **   ~~~   **   This error occurred 403350 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************  **   ~~~   **   Max=-2.070452E-004 []  Min=-13.011505 []
   *************
   *************  ** Warning ** Temperature out of range [-100. to 200.] (PsyPsatFnTemp)
   *************  **   ~~~   **   This error occurred 310195 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************  **   ~~~   **   Max=-100.083049 C  Min=-30999.673925 C
   *************
   *************  ** Warning ** SimHVAC: Exceeding Maximum iterations for all HVAC loops, during FULL YEAR RUN continues
   *************  **   ~~~   **   This error occurred 600 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************
   *************  ** Warning ** Temperature out of range [-100. to 200.] (PsyTwbFnTdbWPb)
   *************  **   ~~~   **   This error occurred 16 total times;
   *************  **   ~~~   **   during Warmup 0 times;
   *************  **   ~~~   **   during Sizing 0 times.
   *************  **   ~~~   **   Max=877.753425 C  Min=213.188952 C
   *************
   *************
   ************* ===== Final Error Summary =====
   ************* The following error categories occurred.  Consider correcting or noting.
   ************* InterZone Surface Areas -- mismatch
   ************* ..Area mismatch errors happen when the interzone surface in zone A is
   ************* ..not the same size as it's companion in zone B.
   *************
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 10 Warning; 0 Severe Errors.
   ************* EnergyPlus Completed Successfully-- 1387750 Warning; 0 Severe Errors; Elapsed Time=01hr 31min 28.49sec




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