Re: [EnergyPlus_Support] COMIS_opening factors

["Michael J. Witte" <mjwitte@xxxxxxxx>]

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
> 
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> 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.
> 
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> "search" button.
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 


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





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