Re: [EnergyPlus_Support] question about Window 5

[Frederick Winkelmann <FCWinkelmann@xxxxxxx>]

Ned is right. The safest approach is to match the WINDOW 5 window size and EnergyPlus window size should match within 10%.
That is the window heights should agree to 10% and the widths to 10%. Note that the window height and width used in the
EnergyPlus calculation are determined from the window vertices in the EnergyPlus input file; they are NOT the height and
width on the WINDOW 5 file.

Also, in EnergyPlus the calculated height and width are those of the glazed part of the window and exclude the frame. The
height and width on the WINDOW 5 data file also exclude the frame, so are consistent with the EnergyPlus definition.
HOWEVER, I believe that when you run WINDOW 5 the height and width you enter INCLUDES THE FRAME the frame -- will verify.

Fred Winkelmann

Edward Lyon wrote:

> You should change the size of the window in WINDOW 5 and recalculate it
> before using it in EnergyPlus.  You should not have to recalculate the
> frame elements to do this.  EnergyPlus is reading detailed information
> for transparent and opaque sections of the window from the WINDOW 5
> file.  The warning is reasonable because changing the size of the window
> changes the relative contibution of individual component contributions
> to the thermal performance.  Small windows do not have the same U-Value
> as larger windows made from identical components because they have more
> edge and frame area relative to center of glass.  I recall some
> discussionn in the manual for EnergyPlus about what happens when the
> specified WINDOWS 5 window sizes do not match EnergyPlus winndow size.
>
> Ned Lyon
>
> Senior Project Manager
> Simpson Gumpertz & Heger Inc.
>
> 41 Seyon Street
> Building #1, Suite 500
> Waltham, MA  02453
>
> Phone:  781-907-9000
> Fax:  781-907-9009
>
> >>> idoebber@xxxxxx 01/22/04 4:34 PM >>>
>
> 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 are of the Support Web Site.
>
>  -- please post any files to the appropriate folder in the Files are of the Support Web Site.
>
>
>
> Yahoo! Groups Links
>
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>
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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 are of the Support Web Site.




 -- please post any files to the appropriate folder in the Files are of the Support Web Site.




 

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