[Bldg-sim] Interior window creation

[Nick Caton]

Alan,  

 

To my understanding, you simply cannot put a window on an interior wall.
The best approximation may be as follows:

1.       Keep the internal wall in it's entirety - this will model heat
transfer to the adjoining space correctly... if it's a large internal
window consider adjusting the internal partition's properties to match
the effective thermal mass/U-value.

2.       Create a new external wall, of any construction layers, on top
of the interior wall with the exact (maybe rounded) area of the window

3.       Create a window on that exterior wall with that exact area and
with matching properties to the real glazing with one exception:  Give
it a ridiculously low U-value to effectively eliminate what would be the
modeled thermal transfer interactions with the exterior.

4.       Assign window shades to model the solar shading effects of the
adjacent space (ceiling/walls).

 

Best of luck!

 

~Nick

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jackson,
Alan
Sent: Thursday, May 27, 2010 5:47 PM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Interior window creation

 

I am attaching the pd2 and inp, just so someone can confirm they get the
same error. I am on a 64-bit machine so I have been getting weird
warnings and error to begin with back when I was using the wizard.

 

Alan Jackson, LEED AP
KlingStubbins

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jackson,
Alan
Sent: Thursday, May 27, 2010 6:43 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Interior window creation

 

I am attempting to create an interior window to allow solar gains to
pass through a sunspace to an adjacent space. I am getting to the
following warning when attempting to create a window component on the
interior wall.

 

 

 

As a work around I changed the wall to EXTERIOR-WALL in order to add the
windows then planned on changing back to INTERIOR-WALL but when I open
the project I get a warning saying "A PARENT EXTERIOR-WALL must be
defined before .."

 

I know you can create interior windows and use them in conjunction with
sunspaces as the DOE2 manual specifically calls out this scenario. 

 

What am I doing wrong?

 

 

Alan Jackson, LEED AP
KlingStubbins

 

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