[Equest-users] Unconditioned Zones -> Interior Walls

[Dakota Kelley]

Taylor,

In a word, no.  The best way to model your porch is to delete the porch zones and add building shades in detailed mode.  This will make your exterior walls truly exterior and allow you to add windows wherever they need to be.  I specify building shades because they will rotate with the structure if you adjust the azimuth.  Fixed shades are considered permanent site fixtures and are not affected by changes to the building's orientation.  

If your porch has a lot of vertical walls/columns that you feel are important to include, I would again use building shades to represent them.  However, I would first consider whether or not their shading effect is truly worth the time.  You could spend a couple hours adding them in only to see a 0.001% impact.  

With respect to your proposed strategy, changing the construction type has no effect on whether eQUEST treats a wall as interior or exterior.  By DOE2.2 definition, interior walls never communicate thermally with the building exterior.  "Wall type" dictates where heat is transferred (with "interior" enabling the NEXT-TO keyword, or allowing the wall to be adiabatic).  "Construction" simply controls the rate at which the transfer occurs.

Regards,
		
		DAKOTA KELLEY				
		Project Designer

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-----Original Message-----
From: Taylor Sharpe [mailto:newspectrum at gmail.com] 
Sent: Wednesday, January 13, 2010 2:28 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Unconditioned Zones -> Interior Walls

In experimenting with the best way to simulate a porch with extended
overhangs, I created a shell that had a perimeter of unconditioned
space to represent the porch.  The problem with this approach seems to
be that all of the N, NE and E walls default to "IWall" defaults,
including IWall Construction etc.  My question is: will the program
treat these walls as if they were originally exterior in the model if
I change the construction type of each to an "EWall" default
construction?

Image details:
On the right side, you see default EWall construction.  All of the
lighter walls that fall under the building shades defaulted to IWall,
but are now EWall Adiabatic constructions.

Will this solve my problem?

Regards,
-Taylor Sharpe

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