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Re: [EnergyPlus_Support] Handling Windows in E+
In the I/O Ref, beginning on p. 184 (pdf p. 220), there is a description of the
contents of the Window5 Data file. The quantities used in EnergyPlus are show
in bold.
The glazing system properties are all for center of glass and do not change
with the window dimensions. The window subsurface dimensions in the EnergyPlus
input file are the glass dimensions, and the glazing properties from the
Window5 data file are applied to this glass area (less any dividers, frames are
outside the subsurface dimensions).
The only quantities that are dependent on actual window dimensions are the
average frame and dividier characteristics. If the frame is uniform on all
sides, then the average properties will be the same no matter what the window
dimensions are.
So, yes, for a window with a uniform frame, E+ adjusts these dimensions with no
loss of accuracy.
Mike
On 20 Mar 2006 at 22:26, Mike Moon wrote:
> Mike,
>
> Thanks for the suggestion. I guess I am not still clear how does E+ adjusts
> the dimensions. The text pdf p. 218 states "If there is one glazing system,
> the glazing system height and width from the Window5 data file are not used."
> Lets say my window in idf file (actual size in my building) is 1000 mm x 1600
> mm but in WINDOW5 I had modeled it as Fixed (picture) window 1200 mm x 1500
> mm. Will E+ adjust these diemsnions with reasonable accuracy? I guess I am
> trying to reduce my work, if I could, of creating E+ reports from WINDOW5.
>
> Mike
>
>
>
>
> "Michael J. Witte" <mjwitte@xxxxxxxx> wrote:
> It depends on the window details. Some windows will scale well, others will
> not. See discussion in Input Output Reference titled "Importing Windows from
> WINDOW 5" beginning on p. 180 (pdf p. 216), especially the top of p. 180 (pdf
> p. 218).
>
> Mike
>
>
> On 20 Mar 2006 at 19:30, Mike Moon wrote:
>
> > Hi,
> > I accidently send a blank mail with this subject line. I apologise.
> >
> > I wanted to ask the following question to the group:
> >
> > I am using WINDOW5 to create a window. Do I need to create exactly the
> same
> > size window in .idf? If I do not; then E+ issues a warning. I was
> wondering
> > if this is just a warning or will it affect the results as well. How does
> E+
> > handle size variations?
> >
> > thanks
> > Mike
> >
> >
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> >
> >
> >
>
>
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@xxxxxxxx
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> Attachments are not allowed -- please post any files to the appropriate folder
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
The primary EnergyPlus web site is found at:
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The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
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