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RE: [EnergyPlus_Support] Handling Windows in E+
E+ will adjust the dimensions just fine (using the geometry in the E+ surface input object). Strickly speaking, the Window5 model results for center of glass performance will vary with size of the product (because of how convection is modeled inside the gap). Although this subtle feature leads to including a disclaimer/warning on the dimension missmatch, I think most would agree that it can be safely ignored for annual energy modeling. Matching the height dimension is more important than matching width. You could play with sizes in Window5 to see the magnitude of the impact on window performance levels.
Brent
-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]On Behalf Of Mike Moon
Sent: Monday, March 20, 2006 3:27 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Handling Windows in E+
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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