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Re: [EnergyPlus_Support] An error when applied the UCSD Displacement Ventilation Module
Thanks, Mike.
If I delete all the Room Air Mode for the zones with the UCDS DV, then these errors are gone,even I have the RoomAir Mode inputs for the UCDS UFAD. It seems this error is in the DV mode itself.
I checked the zone inputs for the internal loads. These inputs are based on design data and all seems normal.
Thanks.
Regards,
David
"Michael J. Witte" <mjwitte@xxxxxxxx> wrote: This type of error will trip on the first zone that goes past the limit, so it
is not surprising that fixing one zone will lead to failure in another similar
zone. If you delete all of the room air models, does the simulation run
normally?
Mike
On 4 Feb 2008 at 12:40, Zhen Tian wrote:
> Thanks, Mike.
>
> Actually this error only appears when I add the UCSD DV module into the zones.
> There is no problem when I use the UCSD UFAD module or use conventional mixing
> module.
>
> I tried to delete the RoomAir Model for the zone with errors. Then, another zone
> appears the same error and causes the simulation to crash.
>
> Thanks.
>
> Regards,
>
> David
>
>
>
> "Michael J. Witte" <mjwitte@xxxxxxxx> wrote: It is
> difficult to say without more information. My guess is that there is
> something wrong with the ventilation inputs and the zone is overheating from
> solar or internal gains. Did the simulation progress far enough to report any
> output? Perhaps you can report zone air and surface temperatures and determine
> more about the problem.
>
> Mike
>
> On 29 Jan 2008 at 13:12, Zhen Tian wrote:
>
> > Dear all,
> >
> > I modeled one floor of a building with displacement ventilation builidng. I
> used > the UCSD Displacement ventilation module in my simulaiton model. Then I
> got the > following warnings and error. > > "Warning ** Calculated Relative
> Humidity out of range (PsyRhFnTdbWPb) > ** ~~~ ** Occurrence
> info=CALGARY INT'L AB CAN WYEC2-B-25110 > WMO#=718770, 01/02 05:00 - 05:10
> ** ~~~ ** Dry-Bulb= -333.04 Humidity > Ratio= 1.000E-005 Calculated
> Relative Humidity (fraction)= 844.67 ** ~~~ > ** Relative Humidity being
> reset to 1.0 > ... > > Severe ** Temperature out of bounds (219.18) for
> surface=SUBOBJ:0468 > ** ~~~ ** in Zone=Z106 > ** ~~~ **
> Occurrence info=CALGARY INT'L AB CAN WYEC2-B-25110 > WMO#=718770, 01/02
> 05:05 - 05:06 ** ~~~ ** 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." > > But I did not use
> reguar-r for building materials and construciton. In addition, > the model
> without the UCSD DV module has not problem. > > Does someone has the same
> experiences before and can tell me how to resolve this > issue? > > Thanks a
> lot in advance. > > Regards, > > David > > > >
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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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