[Bldg-sim] Equest: Solarwall, Trombe Wall modeling

[Kingsley, Michael L.]

Undoubtedly the SolarWall will save energy, but due to the intermittency
of solar (especially at night!) I would be surprised if you could
actually downsize the heating capacity of your air handlers just by
adding the SolarWall.  Perhaps your model results are eluding to this.
It certainly deserves careful consideration.

Best Regards,

Michael L. Kingsley, PhD, PE, LEED AP
Senior Engineer/ Project Manager
SAIC
6390 Fly Road
East Syracuse, New York 13057


-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Kevin Kyte
Sent: Wednesday, May 28, 2008 8:29 AM
To: 'Karen Walkerman'; 'Eric Wilson'
Cc: equest-users at lists.onebuilding.org; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Equest: Solarwall, Trombe Wall modeling

Yes, I have used RETScreen and understand a solar wall can be modeled
within it.  In fact, Conserval has already done this for us.  In
considering SolarWall(r), all the air handlers have been sized down and
when I enter in the system inputs for capacity there isn't enough juice
so I have to incorporate solar air heating into this model.  Either that
or autosize everything to get 300 and subtract the retscreen model as an
ECM.

 

So create a plenum for each air handler and then make all the plenum
walls Trombe-wall and just fiddle with it until it works, maybe.  I can
spend a minute on it and try.  Either way its modeling reality, right?
There should be a lot more discussion on this.  Someone must have
submitted an energy model with solar air heating to USGBC using equest.

 

 

Kevin

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Karen
Walkerman
Sent: Tuesday, May 27, 2008 4:07 PM
To: Eric Wilson
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Equest: Solarwall, Trombe Wall modeling

 

You could also experiment with creating a space of type "plenum" with
the dimensions and properties of a solar wall.  If I were taking the
experimentation route, this is where I would start.

~karen~

On Tue, May 27, 2008 at 4:04 PM, Eric Wilson <ejwilsn1 at uiuc.edu> wrote:

Kevin,

I've modeled a SolarWall, aka "Solar Air Heating" or transpired air
collectors using RETScreen <http://www.retscreen.net/> .  They have a
Solar Air Heating module that is included in the RETScreen 4 download.
If you don't mind modeling the SolarWall separate from the rest of the
building, then that should work pretty well.


Eric Wilson
Smart Energy Design Assistance Center
University of Illinois - Urbana-Champaign
www.sedac.org
(217) 244-4671
(800) 214-7954



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