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Re: [EnergyPlus_Support] No energy balance and fixed boundary conditions
> > Though I now know how to set the outside wall temperatures I would
> > like to run EnergyPlus without the zonal energy balance, but with
> > fixed inside and outside boundary conditions so heat fluxes can be
> > evaluated. Is there a way to turn-off the zonal energy balance along
> > with all other heating/cooling systems?
What you want to do is beyond the intent of EnergyPlus, so I do not know if the
results will be valid.
There is no way to turn off the zonal energy balance, however, you can describe
a zone with a single heat transfer surface and nothing else. This leaves you
with only two components in the zone energy balance: the surface and the zone
air.
To force the inside surface temperature, you will need to condition the zone.
This can be done using PURCHASED AIR and a set of thermostat objects (see
PurchAir.idf example file). Use the ConvectionCoefficients object to set the
inside convection coefficient to something very large which should result in the
inside surface temperature being nearly equal to the zone air temperature. The
thermostat setpoint is then your inside surface temperature.
Again, scrutinize the results carefully to be sure you are getting what you
want.
Mike
On 27 Jul 2004, at 9:07, tcornell@xxxxxxxx wrote:
> Regarding the slash code error, you can ignore these errors or you
> can download a fixed version of the IDD file from the files area of
> the EnergyPlus_Support group at yahoo:
>
> File : /Updates/Windows/Energy+.idd
> Uploaded by : lklawrie <linda@xxxxxxxxxx>
> Description : The GeometryTransform object had some "minimum" fields that
> showed warning errors when used in the IDF Editor. This file resolves those
> and can replace your Energy+,idd in the V1.2.0.029 release.
>
> You can access the file at the URL
>
> http://groups.yahoo.com/group/EnergyPlus_Support/files/Updates/Windows/
>
>
> On 26 Jul 2004 at 17:06, sope_obadeyi@xxxxxxx wrote:
>
> >
> > Thanks for the replies to the last email sent to the Forum.
> >
> > Though I now know how to set the outside wall temperatures I would
> > like to run EnergyPlus without the zonal energy balance, but with
> > fixed inside and outside boundary conditions so heat fluxes can be
> > evaluated. Is there a way to turn-off the zonal energy balance along
> > with all other heating/cooling systems?
> >
> > Also, I am receiving the following error message every time I open the
> > IDF- Editor
> >
> > ======
> > The following invalid slash codes were found in the Energy+.IDD file:
> >
> > \minimum>0
> > \minimum>0
> > =========
> > I have not tampered with the Energy+.IDD file at all. Does anyone know
> > why I am getting this message
> >
> > Many Thanks
> >
> >
> > Sope Obadeyi
> >
> >
> >
> >
> >
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> The primary EnergyPlus web site is found at:
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>
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>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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