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[EnergyPlus_Support] Re: Warnings

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Warnings
From: "marieodeline" <Layrisse.Marie-Odeline@xxxxxxxxxxx>
Date: Fri, 03 Jun 2005 13:37:33 -0000
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Dear all,

I am trying to simulate my first buidling with EnergyPlus: a very 
basic building with two thermostatic rooms. I am trying to add a 
Night Cycle Manager, but similar alerts occured.

   ************* 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.
   ** Warning ** Enthalpy out of range (PsyTsatFnHPb)
   **   ~~~   **  Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 
00:15 - 00:30
   **   ~~~   **  Enthalpy=-3722890.49462 Pressure= 99433.54
   **   ~~~   **  Initial Resultant Temperature= -59.98
   ** Warning ** Temperature out of range [-100. to 200.] 
(PsyPsatFnTemp)
   **   ~~~   **  Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 
00:15 - 00:30
   **   ~~~   **  Input Temperature=-3710.86
   ** Warning ** Temperature out of range [-100. to 200.] 
(PsyPsatFnTemp)
   **   ~~~   **  Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 
00:15 - 00:30
   **   ~~~   **  Input Temperature=-3722.73

.......

As you adviced, I checked the autosized cooling coil capacity in the 
eio output. But the air volume flow rates doesn't seem reasonable at 
all.

Could you figure out the sources of this problem?

Here is my .eio file.
*******************************
shadowing/Sun Position Calculations, 20
! <Zone Internal Gains/Equipment Information - Nominal>,Zone Name, 
Floor Area {m2}, # Occupants, Area per Occupant {m2/person}, Occupant 
per Area {person/m2}, General Lighting {w/m2}, Task Lighting {w/m2}, 
Electric Load {w/m2}, Gas Load {w/m2}, Other Load {w/m2}, Hot Water 
Eq {w/m2}, Outdoor Controlled Baseboard Heat
 Zone Internal Gains, ZONE 1,  80.000,   
0.000,N/A,0.000E+000,0.000E+000,0.000E+000,0.000E+000,0.000E+000,0.000
E+000,0.000E+000,No 
 Zone Internal Gains, ZONE 2,  80.000,   
0.000,N/A,0.000E+000,0.000E+000,0.000E+000,0.000E+000,0.000E+000,0.000
E+000,0.000E+000,No 
! <AirFlow Model>, Simple/Comis
 AirFlow Model, Simple
! <RoomAir Model>, Zone Name, Mixing/Mundt/ReesHaves/UCSDDV
RoomAir Model,ZONE 2,Mixing/Well-Stirred
! <Zone Volume Capacitance Multiplier, Value>
Zone Volume Capacitance Multiplier,   1.000
! <Load Time Steps in Zone Design Calculation Averaging Window>, Value
 Time Steps in Averaging Window,    4
! <Sizing Factor Information>, Sizing Factor ID, Value
 Sizing Factor, Global,   1.0000    
! <Zone Sizing Information>, Zone Name, Load Type, DesLoad {W}, Calc 
Des Air Flow Rate {m3/s}, UserDes Air Flow Rate {m3/s}, Design Day 
Name, Time of Peak, Temperature at Peak {C}, Humidity Ratio at Peak 
{kgWater/kgAir}
 Zone Sizing, ZONE 1, Cooling,   2061.7    ,   1148.6    ,   
1148.6    , CHICAGO ILLINOIS SUMMER, 19:00:00,   29.076    ,  
0.14507E-01
 Zone Sizing, ZONE 1, Heating,   3122.3    ,  0.81862E-01,  0.81862E-
01, CHICAGO ILLINOIS WINTER, 09:00:00,  -25.650    ,  0.10000E-04
 Zone Sizing, ZONE 2, Cooling,   1038.1    ,  0.84182    ,  
0.84182    , CHICAGO ILLINOIS SUMMER, 18:00:00,   30.491    ,  
0.14507E-01
 Zone Sizing, ZONE 2, Heating,   3351.3    ,  0.93723E-01,  0.93723E-
01, CHICAGO ILLINOIS WINTER, 09:00:00,  -25.650    ,  0.10000E-04
! <System Sizing Information>, System Name, Field Description, Value
 System Sizing, VAV SYS 1, Calculated cooling design air flow rate 
[m3/s],   1149.4    
 System Sizing, VAV SYS 1, Calculated heating design air flow rate 
[m3/s],  0.17559    
! <Environment>,Environment Name,Environment Type, Start Date, End 
Date, Start DayOfWeek, Duration {#days}, Source:Start DayOfWeek,  Use 
Daylight Saving, Use Holidays, Apply Weekend Holiday Rule,  Use Rain 
Values, Use Snow Values
! <Environment:Special Days>, Special Day Name, Special Day Type, 
Source, Start Date, Duration {#days}
! <Environment:Daylight Saving>, Daylight Saving Indicator, Source, 
Start Date, End Date
! <Environment:WarmupDays>, NumberofWarmupDays
Environment,CHICAGO ILLINOIS SUMMER,DesignDay, 7/21, 
7/21,SummerDesignDay,  1,N/A,N/A,N/A,N/A,N/A,N/A
Environment:Daylight Saving,No,DesignDay
! <Environment:Design Day Data>, Max Dry-Bulb Temp {C}, Temp Range 
{dC}, Temp Range Ind Type, Hum Ind Temp at Max {C}, Hum Ind 
Type,Pressure {Pa}, Wind Direction {deg CW from N}, Wind Speed {m/s}, 
Clearness, Rain, Snow
! <Environment:Design_Day_Misc>,DayOfYear,ASHRAE A Coeff,ASHRAE B 
Coeff,ASHRAE C Coeff,Solar Constant-Annual Variation,Eq of Time 
{minutes}, Solar Declination Angle {deg}
Environment:Design Day Data,32.78,10.89,Default multipliers,23.33,Wet-
Bulb,994330,213.,3.8,0.98,No ,No 
Environment:Design_Day_Misc,202,1084.4,0.2082,0.1365,1.0,-6.23,20.6
! <Component Sizing Information>, Component Type, Component Name, 
Input Field Description, Value
 Component Sizing, COIL:GAS:HEATING, SPACE1-1 ZONE COIL, Nominal 
Capacity of the Coil [W],   3024.7    
 Component Sizing, COIL:GAS:HEATING, SPACE2-1 ZONE COIL, Nominal 
Capacity of the Coil [W],   3463.0    
 Component Sizing, BRANCH, VAV SYS 1 MAIN BRANCH, Maximum Branch Flow 
Rate [m3/s],   1149.4    
 Component Sizing, AIR PRIMARY LOOP, VAV SYS 1, Primary air design 
volumetric flow rate [m3/s],   1149.4    
 Component Sizing, COIL:DX:MULTISPEED:COOLINGEMPIRICAL, MAIN COOLING 
COIL 1, rated air volume flow rate [m3/s],   1149.4    
 Component Sizing, COIL:DX:MULTISPEED:COOLINGEMPIRICAL, MAIN COOLING 
COIL 1, Rated Total Cooling Capacity (gross) [W],  0.24461E+08
 Component Sizing, COIL:GAS:HEATING, MAIN HEATING COIL 1, Nominal 
Capacity of the Coil [W],   0.0000    
Environment:WarmupDays,  5
Environment,CHICAGO ILLINOIS WINTER,DesignDay, 1/21, 
1/21,WinterDesignDay,  1,N/A,N/A,N/A,N/A,N/A,N/A
Environment:Daylight Saving,No,DesignDay
Environment:Design Day Data,-15.00,15.00,Default multipliers,-
21.11,Wet-Bulb,99782.,326.,11.6,0.00E+000,No ,No 
Environment:Design_Day_Misc, 21,1229.0,0.1415,5.7310E-002,1.0,-11.15,-
20.1
Environment:WarmupDays, 16
Environment,CHICAGO IL USA TMY2-94846 WMO#=725300,WeatherRunPeriod, 
1/ 1, 1/31,SUNDAY, 31,UseWeatherFile,Yes,Yes,No ,Yes,Yes
Environment:Daylight Saving,No,
Environment:WarmupDays,  4
End of Data




--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@g...> wrote:
> The min flow rate only applies to chilled water coils.  My guess is 
that the 
> coil is way oversized for the airflow it is seeing.  The DX coil 
controls 
> always call the coil at full part-load in order to determine if 
that is 
> adequate to meet the current load.  If the airflow is too low 
relative to the 
> coil capacity, this may be producing the psychrometric errors 
during these 
> intial calls to the coil.  But this does not impact the results 
necessarily.  I 
> would suggest checking the autosized cooling coil capacity in the 
eio output 
> and then report the air volume flow rates to see if these seem 
reasonable.
> 
> Mike
> 
> 
> On 24 May 2005, at 11:58, Ali_Ajmi wrote:
> 
> > Mike my coil is DX:coil: Multispeed and it is outosized, where i 
could find out
> > the min actuated flow rate that you mentioned. Any how the file 
is uploaded
> > under name VAVEnvolpBuild_fivZone could you please have a look to 
it.
> > 
> > Thanks in advance
> > Ali
> > 
> > "Michael J. Witte" <mjwitte@g...> wrote:
> > In some systems, the cooling coil model may generate such errors 
during initial
> > iterations at very low load conditions. Which cooling coil model 
are you using?
> > What is the min actuated flow rate in the controller for this 
coil? If it is
> > zero, try setting it to a small value, such as 0.00001. If this 
does not help,
> > please post the input file.
> > 
> > Mike
> > 
> > 
> > On 23 May 2005, at 15:03, Ali_Ajmi wrote:
> > 
> > > Dear All,
> > > 
> > > I have created file of office building with five zone, this 
file was made to
> > > run without any errors or warning. The load was covered by 
purchased air now I
> > > replace it with VAV system. Now there some sort of error which 
i could not
> > > figure out their sources:
> > > 
> > > ** Warning ** Enthalpy out of range (PsyTsatFnHPb)
> > > ** ~~~ ** Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 -
 18:30
> > > ** ~~~ ** Enthalpy=-699562.92274 Pressure= 99433.54 ** ~~~ ** 
> > > Initial Resultant Temperature= -59.98 ** Warning ** Temperature 
out of range
> > > [-100. to 200.] (PsyPsatFnTemp) ** ~~~ ** Occurrence 
info=CHICAGO ILLINOIS
> > > SUMMER, 07/21 18:15 - 18:30 ** ~~~ ** Input Temperature=-711.86 
** Warning **
> > > Temperature out of range [-100. to 200.] (PsyPsatFnTemp) ** ~~~ 
** Occurrence
> > > info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** ~~~ ** 
Input
> > > Temperature=-713.97 ** Warning ** Temperature out of range [-
100. to 200.]
> > > (PsyPsatFnTemp) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Input Temperature=-713.98 ** Warning ** 
Calculated Relative
> > > Humidity out of range (PsyRhFnTdbWPb) ** ~~~ ** Occurrence 
info=CHICAGO
> > > ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** ~~~ ** Dry-Bulb= -
713.98 Humidity
> > > Ratio= 1.000E-005 Calculated Relative Humidity (fraction)= 
940.37 ** ~~~ **
> > > Relative Humidity being reset to 1.0 ** Warning ** Enthalpy out 
of range
> > > (PsyTsatFnHPb) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Enthalpy=-699562.92274 Pressure= 99433.54 ** 
~~~ ** Initial
> > > Resultant Temperature= -59.98 ** Warning ** Temperature out of 
range [-100. to
> > > 200.] (PsyPsatFnTemp) ** ~~~ ** Occurrence info=CHICAGO 
ILLINOIS SUMMER, 07/21
> > > 18:15 - 18:30 ** ~~~ ** Input Temperature=-711.86 ** Warning ** 
Temperature
> > > out of range [-100. to 200.] (PsyPsatFnTemp) ** ~~~ ** 
Occurrence info=CHICAGO
> > > ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** ~~~ ** Input 
Temperature=-713.97 **
> > > Warning ** Enthalpy out of range (PsyTsatFnHPb) ** ~~~ ** 
Occurrence
> > > info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** ~~~ **
> > > Enthalpy=-699562.92274 Pressure= 99433.54 ** ~~~ ** Initial 
Resultant
> > > Temperature= -59.98 ** Warning ** Temperature out of range [-
100. to 200.]
> > > (PsyPsatFnTemp) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Input Temperature=-711.86 ** Warning ** 
Calculated Relative
> > > Humidity out of range (PsyRhFnTdbWPb) ** ~~~ ** Occurrence 
info=CHICAGO
> > > ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** ~~~ ** Dry-Bulb= -
713.98 Humidity
> > > Ratio= 1.000E-005 Calculated Relative Humidity (fraction)= 
940.37 ** ~~~ **
> > > Relative Humidity being reset to 1.0 ** Warning ** Enthalpy out 
of range
> > > (PsyTsatFnHPb) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Enthalpy=-699562.92274 Pressure= 99433.54 ** 
~~~ ** Initial
> > > Resultant Temperature= -59.98 ** Warning ** Enthalpy out of 
range
> > > (PsyTsatFnHPb) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Enthalpy=-699562.92274 Pressure= 99433.54 ** 
~~~ ** Initial
> > > Resultant Temperature= -59.98 ** Warning ** Calculated Relative 
Humidity out
> > > of range (PsyRhFnTdbWPb) ** ~~~ ** Occurrence info=CHICAGO 
ILLINOIS SUMMER,
> > > 07/21 18:15 - 18:30 ** ~~~ ** Dry-Bulb= -713.98 Humidity Ratio= 
1.000E-005
> > > Calculated Relative Humidity (fraction)= 940.37 ** ~~~ ** 
Relative Humidity
> > > being reset to 1.0 ** Warning ** Enthalpy out of range 
(PsyTsatFnHPb) ** ~~~
> > > ** Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 - 18:30 
** ~~~ **
> > > Enthalpy=-699562.92274 Pressure= 99433.54 ** ~~~ ** Initial 
Resultant
> > > Temperature= -59.98 ** Warning ** Calculated Relative Humidity 
out of range
> > > (PsyRhFnTdbWPb) ** ~~~ ** Occurrence info=CHICAGO ILLINOIS 
SUMMER, 07/21 18:15
> > > - 18:30 ** ~~~ ** Dry-Bulb= -713.98 Humidity Ratio= 1.000E-005 
Calculated
> > > Relative Humidity (fraction)= 940.37 ** ~~~ ** Relative 
Humidity being reset
> > > to 1.0 ** Warning ** Calculated Relative Humidity out of range 
(PsyRhFnTdbWPb)
> > > ** ~~~ ** Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 -
 18:30 ** ~~~
> > > ** Dry-Bulb= -713.98 Humidity Ratio= 1.000E-005 Calculated 
Relative Humidity
> > > (fraction)= 940.37 ** ~~~ ** Relative Humidity being reset to 
1.0 ** Warning
> > > ** Calculated Relative Humidity out of range (PsyRhFnTdbWPb) ** 
~~~ **
> > > Occurrence info=CHICAGO ILLINOIS SUMMER, 07/21 18:15 - 18:30 ** 
~~~ **
> > > Dry-Bulb= -713.98 Humidity Ratio= 1.000E-005 Calculated 
Relative Humidity
> > > (fraction)= 940.37 ** ~~~ ** Relative Humidity being reset to 
1.0
> > > ************* Psychrometric Error Summary ************* 
Routine - Number of
> > > errors ************* PsyTdpFnTdbTwbPb-0 ************* 
PsyRhFnTdbWPb-3970
> > > ************* PsyTwbFnTdbWPb-0 ************* PsyVFnTdbWPb-0 
*************
> > > PsyWFnTdpPb-0 ************* PsyWFnTdbH-0 ************* 
PsyWFnTdbTwbPb-0
> > > ************* PsyWFnTdbRhPb-0 ************* PsyPsatFnTemp-960 
*************
> > > PsyTsatFnHPb-7940 ************* PsyTsatFnPb-0 ************* 
tp12c0-0
> > > ************* tp12c1-0 ************* tp12h0-0 ************* 
tp12h1-0
> > > ************* freeze-0 ************* EnergyPlus Completed 
Successfully-- 21
> > > Warning; 0 Severe Errors; Elapsed Time=00hr 15min 8.00sec
> > > 
> > > Best Regards
> > > Ali 
> > > 
> > > 
> > > 
> > > ---------------------------------
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> > > 
> > > 
> > > The primary EnergyPlus web site is found at:
> > > http://www.energyplus.gov
> > > 
> > > The group web site is:
> > > http://groups.yahoo.com/group/EnergyPlus_Support/
> > > 
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> > > 
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> > > 
> > > 
> > 
> > 
> > 
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support 
> > EnergyPlus-Support@g...
> > 
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
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> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@g...





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