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Re: [EnergyPlus_Support] Warnings
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@xxxxxxxx> 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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> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@xxxxxxxx
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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