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[EnergyPlus_Support] Re: Small School - Modelling Simple Heating and Ventilation Equipment



Dear Group Supporters,

I´m reposting the last post, hoping to get an answer. Unfortunately
I´m still not able to do any "real work" before clarifying the doubts
regarding this simple model.

Thanks for the help
Nuno


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Nuno Costa Brandão
<ncostab@...> wrote:
>
> Hi
> 
> I changed the modelling solution for this building, to a two air loop
> possibility using direct air. I corrected the issues discussed above,
> tried a small period simulation (january month), but it resulted in
> some severe errors. I looked at the issues suggested in the error
> report but I don´t think the problem is related to these suggestions.
> Could it be the HVAC system modelling? The errors are as follow:
> 
> Program Version,EnergyPlus 2.1.0.023, 11-02-2008 16:13,IDD_Version
> 2.1.0.023
>    ************* Beginning Zone Sizing Calculations
>    ** Warning ** Weather file location will be used rather than
> entered Location object.
>    **   ~~~   ** ..Location object=FAMALICAO
>    **   ~~~   ** ..Weather File Location=PORTO - PRT IWEC DATA
WMO#=085450
>    ** Warning ** Calculated design cooling load for zone=EDÍFICIO -
> SALA AULA 3 is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ** Warning ** Calculated design cooling load for zone=EDÍFICIO -
> SALA EDUCADOR is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ** Warning ** Calculated design cooling load for zone=EDÍFICIO -
> SALA AULA 2 is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ** Warning ** Calculated design cooling load for zone=EDÍFICIO -
> SALA AULA 1 is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ************* Beginning System Sizing Calculations
>    ** Warning ** Calculated cooling design air flow rate for
> system=AIR LOOP2 is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ** Warning ** Calculated cooling design air flow rate for
> system=AIR LOOP1 is zero.
>    **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
>    ************* Beginning Plant Sizing Calculations
>    ************* 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 ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =2.493E-003 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 14:30 - 14:31
>    ** Warning ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =9.556E-003 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 14:45 - 14:46
>    ** Warning ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =9.928E-002 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 15:00 - 15:01
>    ** Warning ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =0.824 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 15:15 - 15:16
>    ** Warning ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =246.544 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 15:30 - 15:31
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneHumRat Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:16 - 15:17
>    **   ~~~   **  Input Temperature=200.06
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneAirTemp Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:16 - 15:17
>    **   ~~~   **  Input Temperature=200.06
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneHumRat Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:17 - 15:18
>    **   ~~~   **  Input Temperature=200.34
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneAirTemp Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:17 - 15:18
>    **   ~~~   **  Input Temperature=200.34
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneHumRat Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:17 - 15:18
>    **   ~~~   **  Input Temperature=200.27
>    ** Warning ** Temperature out of range [-100. to 200.]
(PsyPsatFnTemp)
>    **   ~~~   **  CorrectZoneAirTemp Occurrence info=PORTO - PRT IWEC
> DATA WMO#=085450, 01/03 15:17 - 15:18
>    **   ~~~   **  Input Temperature=200.27
>    ** Warning ** Inside surface heat balance did not converge with Max
> Temp Difference [C] =264.266 vs Max Allowed Temp Diff [C] =2.000E-003
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 15:45 - 15:46
>    ** Severe  ** Temperature out of bounds (-102.22) for surface=R_
> EDÍFICIO - SALA AULA 3_1_0_0
>    **   ~~~   ** in Zone=EDÍFICIO - SALA AULA 3
>    **   ~~~   **  Occurrence info=PORTO - PRT IWEC DATA WMO#=085450,
> 01/03 16:00 - 16:01
>    **   ~~~   ** A temperature out of bounds problem can be caused by
> several things.  The user
>    **   ~~~   ** should check the weather environment, the level of
> internal gains with respect
>    **   ~~~   ** to the zone, and the thermal properties of their
> materials among other things.
>    **   ~~~   ** A common cause is a building with no thermal mass --
> all materials with
>    **   ~~~   ** Regular-R definitions.
>    **  Fatal  ** EnergyPlus has exited due to the reason stated above
>    ...Summary of Errors that led to program termination:
>    ..... Reference severe error count=1
>    ..... Last severe error=Temperature out of bounds (-102.22) for
> surface=R_ EDÍFICIO - SALA AULA 3_1_0_0
>    ************* EnergyPlus Terminated--Fatal Error Detected. 19
> Warning; 1 Severe Errors; Elapsed Time=00hr 00min  7.17sec
> 
> I´m uploanding the file so that you can have a look at it.
> 
> Thanks for the help
> Nuno Brandão
>




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