[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] COMIS_opening factors



Are you reporting at the TIMESTEP reporting frequency?  The opening factor can 
change at every zone time step, so if the reporting frequency is longer than 
the zone time step, you will see the opening factor averaged over that time 
period.

Mike


On 28 Mar 2006 at 16:20, friedl decock wrote:

> Thanks, but still the problem isn't solved.
> 
> Even if I leave the following field blank "Limit Value on Multiplier for
> Modulating Venting Open Factor", E+ don't take the openingfactors I defined
> in Comis:AirFlow:Opening. If I give the 'window open factor for ventilation'
> a value 0.2, the openingfactor varies between 0 and 0.2. I only want to have
> 0 and 0.2.
> 
> Friedl
> 
> On 3/28/06, Michael J. Witte <mjwitte@xxxxxxxx> wrote:
> >
> >  1.  Modulation of the vent opening can be disabled.  From the Input
> > Output
> > Reference, just before the field "Limit Value on Multiplier for Modulating
> >
> > Venting Open Factor":  Note that the default values of the following
> > fields are
> > such that, if none of the fields are specified, modulation will not occur.
> > (p.
> > 350, pdf p. 386).
> >
> > 2.  The only way I can think of to turn off venting when high wind or rain
> > is
> > present would be to use the "Venting Schedule".  By reporting the wind
> > speed
> > and rain flag from a weather file run (or by converting the epw file to a
> > csv
> > file), one could use a spreadsheet to create a set of schedule values
> > which are
> > zero when high wind or rain is present.  This set of schedule values could
> > be
> > saved as a text file with 8784 rows for use with Schedule:File:Comma.
> > NOTE:
> > There is a known bug:  "Schedule:File:Comma only takes 8760 values.  The
> > 24
> > values after Feb 28 are always assumed to be for Feb 29, and Dec 31 is
> > always
> > zero.  For non-leap year simulations, this results in value for March 1
> > being
> > skipped and all remaining values shifting up.  Workaround:  A partial
> > workaround is to include values for Feb 29 in the csv file.  This will
> > ensure
> > that the March 1 values are used for March 1 and no shift occurs.  But
> > this
> > still results in zero values for Dec 31.  There is no workaround for that
> > part
> > of the problem."  (This has been fixed for the next release.)
> >
> > Mike
> >
> >
> >
> > On 24 Mar 2006 at 18:17, friedl decock wrote:
> >
> > > Hi,
> > >
> > > I'm also trying to simulate a zone with night cooling. When night
> > cooling is
> > > needed I want to have the windows open at opening factor 0.2 and when it
> > > isn't needed just closed windows. That means that I only want to have
> > two
> > > opening factors.
> > >
> > > E+ takes an opening factor in function of the temperature difference
> > between
> > > indoor and outdoor, so the opening factor is variable.
> > > Does anyone know how I can have fixed opening factors? (or a little
> > trick
> > > with the value on multiplier, ...?)
> > >
> > >  Is it possible to stop the night cooling when it starts raining or when
> > the
> > > windspeed is too high?
> > >
> > > Friedl
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > > The primary EnergyPlus web site is found at:
> > > http://www.energyplus.gov
> > >
> > > The group web site is:
> > > http://groups.yahoo.com/group/EnergyPlus_Support/
> > >
> > > Attachments are not allowed -- please post any files to the appropriate
> > folder
> > > in the Files area of the Support Web Site.
> > >
> > > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and
> > press the
> > > "search" button.
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support
> > EnergyPlus-Support@xxxxxxxx
> >
> >
> >
> >
> >
> >  The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> >
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> >
> > Attachments are not allowed -- please post any files to the appropriate
> > folder in the Files area of the Support Web Site.
> >
> > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press
> > the "search" button.
> >
> >
> >
> >  ------------------------------
> > YAHOO! GROUPS LINKS
> >
> >
> >    -  Visit your group
> "EnergyPlus_Support<http://groups.yahoo.com/group/EnergyPlus_Support>"
> >    on the web.
> >
> >    -  To unsubscribe from this group, send an email to:
> >    
> EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx<EnergyPlus_Support-unsubscribe@
> yahoogroups.com?subject=Unsubscribe>
> >
> >    -  Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> >    Service <http://docs.yahoo.com/info/terms/>.
> >
> >
> >  ------------------------------
> >
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the
> "search" button.
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/